| LBDWFLLC | Fluoride, water comment code | FLDW_K_R | Fluoride - Water | 2019 | 2020 | Laboratory | RDC Only |
| LBXWFL | Fluoride, water (mg/L) | FLDW_K_R | Fluoride - Water | 2019 | 2020 | Laboratory | RDC Only |
| SEQN | Respondent sequence number. | FLDW_K_R | Fluoride - Water | 2019 | 2020 | Laboratory | RDC Only |
| LBDATGLC | Thyroglobulin antibodies Comment Code | THYD_K_R | Thyroid Profile - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBDTGNLC | Thyroglobulin Comment Code | THYD_K_R | Thyroid Profile - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBDTPOLC | Thyroid Peroxidase (TPO) antibodies Comment Code | THYD_K_R | Thyroid Profile - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBXATG | Thyroglobulin antibodies (pmol/L) | THYD_K_R | Thyroid Profile - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBXT3F | Triiodothyronine, free (FT3) (pmol/L) | THYD_K_R | Thyroid Profile - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBXT4F | Thyroxine, free (FT4) (ng/dL) | THYD_K_R | Thyroid Profile - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBXTGN | Thyroglobulin (ng/mL) | THYD_K_R | Thyroid Profile - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBXTPO | Thyroid Peroxidase (TPO) antibodies (IU/mL) | THYD_K_R | Thyroid Profile - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBXTSH1 | Thyroid stimulating hormone (TSH) (mIU/L) | THYD_K_R | Thyroid Profile - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBXTT3 | Triiodothyronine, total (TT3) (ng/dL) | THYD_K_R | Thyroid Profile - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBXTT4 | Thyroxine, total (TT4) (nmol/L) | THYD_K_R | Thyroid Profile - Serum | 2019 | 2020 | Laboratory | RDC Only |
| SEQN | Respondent sequence number | THYD_K_R | Thyroid Profile - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBXTB1 | TB1 Antigen result - Primarily detects CD4 T cell response | TB_K_R | Tuberculosis - Quantiferon TB Gold Plus | 2019 | 2020 | Laboratory | RDC Only |
| LBXTB2 | TB2 Antigen result - Optimized for detection of CD4 and CD8 T cell responses | TB_K_R | Tuberculosis - Quantiferon TB Gold Plus | 2019 | 2020 | Laboratory | RDC Only |
| LBXTBIN | TB coded result | TB_K_R | Tuberculosis - Quantiferon TB Gold Plus | 2019 | 2020 | Laboratory | RDC Only |
| LBXTBM | TB Mitogen control result - Positive Control | TB_K_R | Tuberculosis - Quantiferon TB Gold Plus | 2019 | 2020 | Laboratory | RDC Only |
| LBXTBN | TB Nil control result - Negative Control | TB_K_R | Tuberculosis - Quantiferon TB Gold Plus | 2019 | 2020 | Laboratory | RDC Only |
| SEQN | Respondent sequence number. | TB_K_R | Tuberculosis - Quantiferon TB Gold Plus | 2019 | 2020 | Laboratory | RDC Only |
| LBD17HLC | 17α-hydroxyprogesterone Comment Code | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBD17HSI | 17α-hydroxyprogesterone (nmol/L) | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBDAMHLC | Anti-Mullerian hormone Comment Code | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBDAMHSI | Anti-Mullerian hormone (pmol/L) | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBDANDLC | Androstenedione Comment Code | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBDANDSI | Androstenedione (nmol/L) | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBDDHELC | Dehydroepiandrosterone Comment Code | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBDDHESI | Dehydroepiandrosterone (µmol/L) | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBDES1LC | Estrone Sulfate Comment Code | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBDES1SI | Estrone Sulfate (pmol/L) | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBDESOLC | Estrone Comment Code | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBDESOSI | Estrone (pmol/L) | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBDESTLC | Estradiol Comment Code | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBDESTSI | Estradiol (pmol/L) | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBDFSHLC | Follicle Stimulating Hormone Comment Code | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBDLUHLC | Luteinizing Hormone Comment Code | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBDPG4LC | Progesterone Comment Code | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBDPG4SI | Progesterone (nmol/L) | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBDSHGLC | Sex Hormone Binding Globulin Comment Code | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBDTSTLC | Testosterone comment code | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBDTSTSI | Testosterone, total (nmol/L) | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBX17H | 17α-hydroxyprogesterone (ng/dL) | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBXAMH | Anti-Mullerian hormone (ng/mL) | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBXAND | Androstenedione (ng/dL) | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBXDHE | Dehydroepiandrosterone (µg/dL) | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBXES1 | Estrone Sulfate (pg/mL) | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBXESO | Estrone (ng/dL) | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBXEST | Estradiol (pg/mL) | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBXFSH | Follicle Stimulating Hormone (mIU/mL) | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBXLUH | Luteinizing Hormone (mIU/mL) | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBXPG4 | Progesterone (ng/dL) | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBXSHBG | Sex Hormone Binding Globulin (SHBG, nmol/L) | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| LBXTST | Testosterone, total (ng/dL) | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| SEQN | Respondent sequence number. | TST_K_R | Sex Steroid Hormone Panel - Serum | 2019 | 2020 | Laboratory | RDC Only |
| AIALANGA | Language of the MEC ACASI Interview Instrument | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| DMDEDUC2 | What is the highest grade or level of school {you have/SP has} completed or the highest degree {you have/s/he has} received? | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| DMDEDUC3 | What is the highest grade or level of school {you have/SP has} completed or the highest degree {you have/s/he has} received? | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| DMDFMSIZ | Total number of people in the Family | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| DMDHHSIZ | Total number of people in the Household | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| DMDHHSZA | Number of children aged 5 years or younger in the household | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| DMDHHSZB | Number of children aged 6-17 years old in the household | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| DMDHHSZE | Number of adults aged 60 years or older in the household | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| DMDHRAGZ | HH reference person's age in years | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| DMDHREDZ | HH reference person's education level | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| DMDHRGND | HH reference person's gender | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| DMDHRMAZ | HH reference person's marital status | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| DMDHSEDZ | HH reference person's spouse's education level | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| DMDMARTL | Marital status | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| DMDYRUSZ | Length of time the participant has been in the US. | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| DMQ135 | {Were you/Was {SP}} born in the United States or a United States territory | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| DMQADFC | Did {you/SP} ever serve in a foreign country during a time of armed conflict or on a humanitarian or peace-keeping mission? (This would include National Guard or reserve or active duty monitoring or conducting peace keeping operations in Bosnia and Kosovo, in the Sinai between Egypt and Israel, or in response to the 2004 tsunami or Haiti in 2010.) | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| DMQMILIZ | {Have you/Has SP} ever served on active duty in the U.S. Armed Forces, military Reserves, or National Guard? (Active duty does not include training for the Reserves or National Guard, but does include activation, for service in the U.S. or in a foreign country, in support of military or humanitarian operations.) | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| FIAINTRP | Was an interpreter used to conduct the Family interview? | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| FIALANG | Language of the Family Interview Instrument | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| FIAPROXY | Was a Proxy respondent used in conducting the Family Interview? | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| INDFMIN2 | Total family income (reported as a range value in dollars) | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| INDFMPIR | A ratio of family income to poverty guidelines. | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| INDHHIN2 | Total household income (reported as a range value in dollars) | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| MIAINTRP | Was an interpreter used to conduct the MEC CAPI interview? | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| MIALANG | Language of the MEC CAPI Interview Instrument | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| MIAPROXY | Was a Proxy respondent used in conducting the MEC CAPI Interview? | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| RIAGENDR | Gender of the participant. | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| RIDAGEMN | Age in months of the participant at the time of screening. Reported for persons aged 24 months or younger at the time of exam (or screening if not examined). | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| RIDAGEYR | Age in years of the participant at the time of screening. Individuals 80 and over are topcoded at 80 years of age. | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| RIDEXAGM | Age in months of the participant at the time of examination. Reported for persons aged 19 years or younger at the time of examination. | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| RIDEXMON | Six month time period when the examination was performed - two categories: November 1 through April 30, May 1 through October 31. | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| RIDEXPRG | Pregnancy status for females between 20 and 44 years of age at the time of MEC exam. | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| RIDRETH1 | Recode of reported race and Hispanic origin information | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| RIDRETH3 | Recode of reported race and Hispanic origin information, with Non-Hispanic Asian Category | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| RIDSTATR | Interview and examination status of the participant. | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| SDDSRVYR | Data release cycle | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| SEQN | Respondent sequence number. | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| SIAINTRP | Was an interpreter used to conduct the Sample Person (SP) interview? | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| SIALANG | Language of the Sample Person Interview Instrument | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| SIAPROXY | Was a Proxy respondent used in conducting the Sample Person (SP) interview? | DEMO_K_R | Demographic Variables | 2019 | 2020 | Demographics | RDC Only |
| DBD030 | How old was {SP} when {he/she} completely stopped breastfeeding or being fed breastmilk? | DB24_K_R | Diet Behavior & Nutrition - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| DBD041 | How old was {SP} when {he/she} was first fed formula? | DB24_K_R | Diet Behavior & Nutrition - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| DBD050 | How old was {SP} when {he/she} completely stopped drinking formula? | DB24_K_R | Diet Behavior & Nutrition - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| DBD055 | This next question is about the first thing that {SP} was given other than breast milk or formula. Please include juice, cow's milk, sugar water, baby food, or anything else that {SP} might have been given, even water. How old was {SP} when {he/she} was first fed anything other than breast milk or formula? (Days) | DB24_K_R | Diet Behavior & Nutrition - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| DBD061 | How old was {SP} when {he/she} was first fed milk? | DB24_K_R | Diet Behavior & Nutrition - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| DBQ010 | Now I'm going to ask you some general questions about {SP's} eating habits. Was {SP} ever breastfed or fed breastmilk? | DB24_K_R | Diet Behavior & Nutrition - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| DBQ035 | Some children might drink breast milk from a bottle, cup (including sippy cup), or spoon as well as at the breast. How was {SP} drinking breast milk in the past 2 weeks? | DB24_K_R | Diet Behavior & Nutrition - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| DBQ073A | What type of milk was {SP} first fed? Was it . . . | DB24_K_R | Diet Behavior & Nutrition - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| DBQ073B | What type of milk was {SP} first fed? Was it . . . | DB24_K_R | Diet Behavior & Nutrition - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| DBQ073C | What type of milk was {SP} first fed? Was it . . . | DB24_K_R | Diet Behavior & Nutrition - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| DBQ073D | What type of milk was {SP} first fed? Was it . . . | DB24_K_R | Diet Behavior & Nutrition - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| DBQ073E | What type of milk was {SP} first fed? Was it . . . | DB24_K_R | Diet Behavior & Nutrition - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| DBQ073U | What type of milk was {SP} first fed? Was it . . . | DB24_K_R | Diet Behavior & Nutrition - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| DBQ158 | In the past 2 weeks, was {SP} fed formula mixed with breast milk in the same bottle? | DB24_K_R | Diet Behavior & Nutrition - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| DBQ161 | How were the formula and breast milk usually mixed? | DB24_K_R | Diet Behavior & Nutrition - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| DBQ167 | In the past 2 weeks, how often was water added to breast milk before feeding it to {SP}? | DB24_K_R | Diet Behavior & Nutrition - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| DBQ173 | In the past 2 weeks, how often did you add more water to the formula than the instructions on the package say? | DB24_K_R | Diet Behavior & Nutrition - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| DBQ176 | In the past 2 weeks, was baby cereal added to {SP}'s bottle of formula or breast milk? | DB24_K_R | Diet Behavior & Nutrition - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| DBQ179 | In the past 2 weeks, was a sweetener, such as juice, honey, sugar, or flavored beverage, added to {SP}'s bottle of formula or breast milk? | DB24_K_R | Diet Behavior & Nutrition - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| DBQ182 | In the past 2 weeks, were vitamins or minerals added to {SP}'s bottle of formula or breast milk? | DB24_K_R | Diet Behavior & Nutrition - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| DBQ185 | In the past 30 days, was medicine such as acetaminophen, ibuprofen, gas drops, colic drops, or antibiotics added to {SP}'s bottle of formula or breast milk? | DB24_K_R | Diet Behavior & Nutrition - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| DBQ660 | How old was {SP} when {he/she} was first fed grains, such as cereal, puffs, teething biscuits, crackers, bread, pasta, or rice? Include baby cereal added to a bottle. | DB24_K_R | Diet Behavior & Nutrition - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| DBQ665 | How old was {SP} when {he/she} was first fed a vegetable, including jarred baby food or cooked, pureed, cut up or mashed vegetables, or vegetable juice? | DB24_K_R | Diet Behavior & Nutrition - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| DBQ670 | How old was {SP} when {he/she} was first fed a fruit including jarred baby food or cooked, pureed, cut up, or mashed fruits or fruit juice? | DB24_K_R | Diet Behavior & Nutrition - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| DBQ675 | How old was {SP} when {he/she} was first fed dairy products other than milk, such as yogurt, cottage cheese, or cheese? | DB24_K_R | Diet Behavior & Nutrition - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| DBQ680 | How old was {SP} when {he/she} was first fed an egg, meat, poultry, or seafood (for example, beef, pork, chicken, turkey, sausage, fish, eggs)? | DB24_K_R | Diet Behavior & Nutrition - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| DBQ685 | How old was {SP} when {he/she} was first fed legumes, such as black beans, kidney beans, pinto beans or lentils? | DB24_K_R | Diet Behavior & Nutrition - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| DBQ690 | How old was {SP} when {he/she} was first fed soy products such as tofu, soy beans, meat substitutes made with soy, or other foods prepared with soy ingredients? | DB24_K_R | Diet Behavior & Nutrition - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| DBQ695 | How old was {SP} when {he/she} was first fed nuts or seeds, such as peanuts or peanut butter, almonds, or other nut or seed products? On this card are other examples. | DB24_K_R | Diet Behavior & Nutrition - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| SEQN | Respondent sequence number. | DB24_K_R | Diet Behavior & Nutrition - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| LBDSL1LC | Iodine, salt - 1st collection comment code | IODS_K_R | Iodine - Salt | 2019 | 2020 | Laboratory | RDC Only |
| LBDSL2LC | Iodine, salt – 2nd collection comment code | IODS_K_R | Iodine - Salt | 2019 | 2020 | Laboratory | RDC Only |
| LBXSL1 | Iodine, salt - 1st collection (mg/kg) | IODS_K_R | Iodine - Salt | 2019 | 2020 | Laboratory | RDC Only |
| LBXSL2 | Iodine, salt - 2nd collection (mg/kg) | IODS_K_R | Iodine - Salt | 2019 | 2020 | Laboratory | RDC Only |
| SEQN | Respondent Sequence Number | IODS_K_R | Iodine - Salt | 2019 | 2020 | Laboratory | RDC Only |
| ECD010 | First I have some questions about {SP NAME's} birth. How old was {SP NAME's} biological mother when {s/he} was born? | EC24_K_R | Early Childhood - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| ECD035 | How much did {SP NAME's} biological mother weigh before she was pregnant with {him/her} in pounds? | EC24_K_R | Early Childhood - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| ECD045 | How tall is {SP NAME's} biological mother without shoes in inches? | EC24_K_R | Early Childhood - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| ECD070A | How much did {SP NAME} weigh at birth? | EC24_K_R | Early Childhood - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| ECD070B | How much did {SP NAME} weigh at birth? | EC24_K_R | Early Childhood - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| ECQ020 | Did {SP NAME's} biological mother smoke at any time while she was pregnant with {him/her}? | EC24_K_R | Early Childhood - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| ECQ080 | Did {SP NAME} weigh . . . | EC24_K_R | Early Childhood - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| ECQ090 | Did {SP NAME} weigh . . . | EC24_K_R | Early Childhood - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| SEQN | Respondent sequence number. | EC24_K_R | Early Childhood - B24 Project | 2019 | 2020 | Questionnaire | RDC Only |
| LBDVAPLC | Blood a-pinene Comment Code | VCWB_K_R | Volatile Organic Compounds - A-Pinene - Blood | 2019 | 2020 | Laboratory | RDC Only |
| LBXVAPN | Blood a-pinene (ng/mL) | VCWB_K_R | Volatile Organic Compounds - A-Pinene - Blood | 2019 | 2020 | Laboratory | RDC Only |
| SEQN | Respondent sequence number. | VCWB_K_R | Volatile Organic Compounds - A-Pinene - Blood | 2019 | 2020 | Laboratory | RDC Only |
| FNQ400 | Now I am going to ask you some questions about {your/SP’s} ability to do different activities, and how {you have/he has/she has} been feeling. {Do you/Does SP} wear glasses or contact lenses? | FNQA_K_R | Functioning - Adult | 2019 | 2020 | Questionnaire | RDC Only |
| FNQ410 | {Do you/Does SP} have difficulty seeing {even if wearing glasses or contact lenses}? Would you say no difficulty, some difficulty, a lot of difficulty, or {you/he/she} cannot do this at all? | FNQA_K_R | Functioning - Adult | 2019 | 2020 | Questionnaire | RDC Only |
| FNQ420 | {Do you/Does SP} use a hearing aid? | FNQA_K_R | Functioning - Adult | 2019 | 2020 | Questionnaire | RDC Only |
| FNQ430 | {Do you/Does SP} have difficulty hearing {even if using a hearing aid}? Would you say no difficulty, some difficulty, a lot of difficulty, or {you/he/she} cannot do this at all? | FNQA_K_R | Functioning - Adult | 2019 | 2020 | Questionnaire | RDC Only |
| FNQ440 | {Do you/Does SP} have difficulty walking or climbing steps? [Would you say no difficulty, some difficulty, a lot of difficulty, or {you/he/she} cannot do this at all?] | FNQA_K_R | Functioning - Adult | 2019 | 2020 | Questionnaire | RDC Only |
| FNQ450 | Using {your/his/her} usual language, {do you/does SP} have difficulty communicating, for example, understanding or being understood? [Would you say no difficulty, some difficulty, a lot of difficulty, or {you/he/she} cannot do this at all?] | FNQA_K_R | Functioning - Adult | 2019 | 2020 | Questionnaire | RDC Only |
| FNQ460 | {Do you/Does SP} have difficulty remembering or concentrating? [Would you say no difficulty, some difficulty, a lot of difficulty, or {you/he/she} cannot do this at all?] | FNQA_K_R | Functioning - Adult | 2019 | 2020 | Questionnaire | RDC Only |
| FNQ470 | {Do you/Does SP} have difficulty with self-care, such as washing all over and dressing? [Would you say no difficulty, some difficulty, a lot of difficulty, or {you/he/she} cannot do this at all?] | FNQA_K_R | Functioning - Adult | 2019 | 2020 | Questionnaire | RDC Only |
| FNQ480 | {Do you/Does SP} have difficulty raising a 2 liter bottle of water or soda from waist to eye level? [Would you say no difficulty, some difficulty, a lot of difficulty, or {you/he/she} cannot do this at all?] | FNQA_K_R | Functioning - Adult | 2019 | 2020 | Questionnaire | RDC Only |
| FNQ490 | {Do you/Does SP} have difficulty using {your/his/her} hands and fingers, such as picking up small objects, for example, a button or pencil, or opening or closing containers or bottles? [Would you say no difficulty, some difficulty, a lot of difficulty, or {you/he/she} cannot do this at all?] | FNQA_K_R | Functioning - Adult | 2019 | 2020 | Questionnaire | RDC Only |
| FNQ500 | Because of a physical, mental, or emotional condition, {do you/does SP} have difficulty doing errands alone such as visiting a doctor’s office or shopping? [Would you say no difficulty, some difficulty, a lot of difficulty, or {you/he/she} cannot do this at all?] | FNQA_K_R | Functioning - Adult | 2019 | 2020 | Questionnaire | RDC Only |
| FNQ510 | How often {do you/does SP} feel worried, nervous, or anxious? Would you say… | FNQA_K_R | Functioning - Adult | 2019 | 2020 | Questionnaire | RDC Only |
| FNQ520 | Thinking about the last time {you/SP} felt worried, nervous, or anxious, how would {you/he/she} describe the level of these feelings? Would you say… | FNQA_K_R | Functioning - Adult | 2019 | 2020 | Questionnaire | RDC Only |
| FNQ530 | How often {do you/does SP} feel depressed? Would you say… | FNQA_K_R | Functioning - Adult | 2019 | 2020 | Questionnaire | RDC Only |
| FNQ540 | Thinking about the last time {you/SP} felt depressed, how depressed did {you/he/she} feel? Would you say… | FNQA_K_R | Functioning - Adult | 2019 | 2020 | Questionnaire | RDC Only |
| FNQ550 | {Do you/Does SP} have difficulty participating in social activities such as visiting friends, attending clubs and meetings, going to parties? Would you say no difficulty, some difficulty, a lot of difficulty, or {you/he/she} cannot do this at all? | FNQA_K_R | Functioning - Adult | 2019 | 2020 | Questionnaire | RDC Only |
| FNQ560 | {Are you/Is SP} limited in the kind or amount of work {you/he/she} can do because of a physical, mental, or emotional problem? | FNQA_K_R | Functioning - Adult | 2019 | 2020 | Questionnaire | RDC Only |
| SEQN | Respondent sequence number. | FNQA_K_R | Functioning - Adult | 2019 | 2020 | Questionnaire | RDC Only |
| FNQ010 | I would like to ask you some questions about difficulties {you/SP} may have. {Do you/Does SP} wear glasses or contact lenses? | FNQC_K_R | Functioning - Child | 2019 | 2020 | Questionnaire | RDC Only |
| FNQ020 | {When wearing {your/his/her} glasses or contact lenses}, {do you/does SP} have difficulty seeing? Would you say {you have/SP has}: no difficulty, some difficulty, a lot of difficulty, or cannot do at all? | FNQC_K_R | Functioning - Child | 2019 | 2020 | Questionnaire | RDC Only |
| FNQ030 | {Do you/Does SP} use a hearing aid? | FNQC_K_R | Functioning - Child | 2019 | 2020 | Questionnaire | RDC Only |
| FNQ040 | {When using {your/his/her} hearing aid}, {do you/does SP} have difficulty hearing sounds like peoples’ voices or music? [Would you say {you have/SP has}: no difficulty, some difficulty, a lot of difficulty, or cannot do at all?] | FNQC_K_R | Functioning - Child | 2019 | 2020 | Questionnaire | RDC Only |
| FNQ050 | {Do you/Does SP} use any equipment or receive assistance for walking? | FNQC_K_R | Functioning - Child | 2019 | 2020 | Questionnaire | RDC Only |
| FNQ060 | Without {your/his/her} equipment or assistance, {do you/does SP} have difficulty walking 100 yards/meters on level ground? That would be about the length of 1 football field. Would you say {you have/SP has}: some difficulty, a lot of difficulty, or cannot do at all? | FNQC_K_R | Functioning - Child | 2019 | 2020 | Questionnaire | RDC Only |
| FNQ070 | Without {your/his/her} equipment or assistance, {do you/does SP} have difficulty walking 500 yards/meters on level ground? That would be about the length of 5 football fields. [Would you say {you have/SP has}: some difficulty, a lot of difficulty, or cannot do at all?] | FNQC_K_R | Functioning - Child | 2019 | 2020 | Questionnaire | RDC Only |
| FNQ080 | Compared with children of the same age, {do you/does SP} have difficulty walking 100 yards/meters on level ground? That would be about the length of 1 football field. [Would you say {you have/SP has}: no difficulty, some difficulty, a lot of difficulty, or cannot do at all?] | FNQC_K_R | Functioning - Child | 2019 | 2020 | Questionnaire | RDC Only |
| FNQ090 | Compared with children of the same age, {do you/does SP} have difficulty walking 500 yards/meters on level ground? That would be about the length of 5 football fields. [Would you say {you have/SP has}: no difficulty, some difficulty, a lot of difficulty, or cannot do at all?] | FNQC_K_R | Functioning - Child | 2019 | 2020 | Questionnaire | RDC Only |
| FNQ100 | When {you speak/SP speaks}, {do you/does he/does she} have difficulty being understood by people inside of this household? [Would you say {you have/SP has}: no difficulty, some difficulty, a lot of difficulty, or cannot do at all?] | FNQC_K_R | Functioning - Child | 2019 | 2020 | Questionnaire | RDC Only |
| FNQ110 | When {you speak/SP speaks}, {do you/does he/does she} have difficulty being understood by people outside of this household? [Would you say {you have/SP has}: no difficulty, some difficulty, a lot of difficulty, or cannot do at all?] | FNQC_K_R | Functioning - Child | 2019 | 2020 | Questionnaire | RDC Only |
| FNQ120 | Compared with children of the same age, {do you/does SP} have difficulty learning things? [Would you say {you have/SP has}: no difficulty, some difficulty, a lot of difficulty, or cannot do at all?] | FNQC_K_R | Functioning - Child | 2019 | 2020 | Questionnaire | RDC Only |
| FNQ130 | Compared with children of the same age, {do you/does SP} have difficulty controlling {your/his/her} behavior? [Would you say {you have/SP has}: no difficulty, some difficulty, a lot of difficulty, or cannot do at all?] | FNQC_K_R | Functioning - Child | 2019 | 2020 | Questionnaire | RDC Only |
| FNQ140 | How often {do you feel/does SP seem} very anxious, nervous or worried? Would you say daily, weekly, monthly, a few times a year or never? | FNQC_K_R | Functioning - Child | 2019 | 2020 | Questionnaire | RDC Only |
| FNQ150 | How often {do you feel/does SP seem} very sad or depressed? Would you say daily, weekly, monthly, a few times a year or never? | FNQC_K_R | Functioning - Child | 2019 | 2020 | Questionnaire | RDC Only |
| SEQN | Respondent sequence number. | FNQC_K_R | Functioning - Child | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ311 | The next questions are about dizziness sensations and difficulty with balance. {Have you/Has SP} ever had a problem with dizziness, light-headedness, feeling as if {you are/SP is} going to pass out or faint, or with unsteadiness or feeling off-balance? Do not include times when drinking alcohol, using recreational drugs, or taking medications that cause dizziness. | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ320a | The next questions are about symptoms of dizziness, light-headedness, or balance problems. Do not include times when drinking alcohol, using recreational drugs, or taking medications that cause dizziness. In the past 12 months, {have you/has SP} experienced...vertigo - a sensation of spinning, tilting, swaying or rocking of {yourself/himself/herself} or {your/his/her} surroundings? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ320b | The next questions are about symptoms of dizziness, light-headedness, or balance problems. Do not include times when drinking alcohol, using recreational drugs, or taking medications that cause dizziness. In the past 12 months, {have you/has SP} experienced...blurring of {your/his/her} vision when {you move your/he moves his/she moves her} head? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ320c | The next questions are about symptoms of dizziness, light-headedness, or balance problems. Do not include times when drinking alcohol, using recreational drugs, or taking medications that cause dizziness. In the past 12 months, {have you/has SP} experienced...unsteady - a feeling of being off-balance or not stable when standing or sitting upright? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ320D | The next questions are about symptoms of dizziness, light-headedness, or balance problems. Do not include times when drinking alcohol, using recreational drugs, or taking medications that cause dizziness. In the past 12 months, {have you/has SP} experienced...light-headed - a feeling {your/his/her} sense of space is mildly distorted, or not quite sharp, but not that {you/he/she} or objects around {you/him/her} are moving? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ320E | The next questions are about symptoms of dizziness, light-headedness, or balance problems. Do not include times when drinking alcohol, using recreational drugs, or taking medications that cause dizziness. In the past 12 months, {have you/has SP} experienced...fainting - a feeling {you are/he is/she is} going to pass out or faint? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ320F | The next questions are about symptoms of dizziness, light-headedness, or balance problems. Do not include times when drinking alcohol, using recreational drugs, or taking medications that cause dizziness. In the past 12 months, {have you/has SP} experienced...disconnected - a detached, floating, or spacey sensation? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ320G | The next questions are about symptoms of dizziness, light-headedness, or balance problems. Do not include times when drinking alcohol, using recreational drugs, or taking medications that cause dizziness. In the past 12 months, {have you/has SP} experienced...other - problems with balance, dizziness or light-headedness that are not well-described by the symptoms already mentioned? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ340 | This next section focuses on {your/the SP's} most bothersome symptom in the past 12 months.
During the past 12 months, which one of these problems with dizziness, balance, or light-headedness bothered {you/SP} the most? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ350 | About how old {were you/was SP} when {RESPONSE FOR BAQ.340} first happened? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ360 | During the past 12 months, how long from the beginning-to-end did each occurrence - episode, bout, or attack - of {your/SP's} {RESPONSE FOR BAQ.340} usually last? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ370 | During the past 12 months, about how often {have you/has SP} had the {RESPONSE FOR BAQ.340}? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ380a | During the past 12 months, were {your/SP's} episodes for {your/his/her} {RESPONSE FOR BAQ.340} triggered by any of the following? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ380b | During the past 12 months, were {your/SP's} episodes for {your/his/her} {RESPONSE FOR BAQ.340} triggered by any of the following? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ380c | During the past 12 months, were {your/SP's} episodes for {your/his/her} {RESPONSE FOR BAQ.340} triggered by any of the following? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ380d | During the past 12 months, were {your/SP's} episodes for {your/his/her} {RESPONSE FOR BAQ.340} triggered by any of the following? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ380e | During the past 12 months, were {your/SP's} episodes for {your/his/her} {RESPONSE FOR BAQ.340} triggered by any of the following? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ380f | During the past 12 months, were {your/SP's} episodes for {your/his/her} {RESPONSE FOR BAQ.340} triggered by any of the following? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ380g | During the past 12 months, were {your/SP's} episodes for {your/his/her} {RESPONSE FOR BAQ.340} triggered by any of the following? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ380h | During the past 12 months, were {your/SP's} episodes for {your/his/her} {RESPONSE FOR BAQ.340} triggered by any of the following? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ380i | During the past 12 months, were {your/SP's} episodes for {your/his/her} {RESPONSE FOR BAQ.340} triggered by any of the following? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ380j | During the past 12 months, were {your/SP's} episodes for {your/his/her} {RESPONSE FOR BAQ.340} triggered by any of the following? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ380k | During the past 12 months, were {your/SP's} episodes for {your/his/her} {RESPONSE FOR BAQ.340} triggered by any of the following? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ390a | During the past 12 months, were {your/SP's} episodes for {your/his/her} {RESPONSE FOR BAQ.340} accompanied by any of the following? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ390b | During the past 12 months, were {your/SP's} episodes for {your/his/her} {RESPONSE FOR BAQ.340} accompanied by any of the following? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ390c | During the past 12 months, were {your/SP's} episodes for {your/his/her} {RESPONSE FOR BAQ.340} accompanied by any of the following? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ390d | During the past 12 months, were {your/SP's} episodes for {your/his/her} {RESPONSE FOR BAQ.340} accompanied by any of the following? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ390e | During the past 12 months, were {your/SP's} episodes for {your/his/her} {RESPONSE FOR BAQ.340} accompanied by any of the following? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ390f | During the past 12 months, were {your/SP's} episodes for {your/his/her} {RESPONSE FOR BAQ.340} accompanied by any of the following? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ390g | During the past 12 months, were {your/SP's} episodes for {your/his/her} {RESPONSE FOR BAQ.340} accompanied by any of the following? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ390h | During the past 12 months, were {your/SP's} episodes for {your/his/her} {RESPONSE FOR BAQ.340} accompanied by any of the following? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ400 | During the past 12 months, {did your/SP's} dizziness or balance problem(s) prevent {you/SP} from doing things {you/he/she} otherwise would do? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ410a | During the past 12 months, did problems with balance, dizziness, or light-headedness prevent {you/SP} from doing any of the following? Working? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ410B | During the past 12 months, did problems with balance, dizziness, or light-headedness prevent {you/SP} from doing any of the following? Attending school? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ410c | During the past 12 months, did problems with balance, dizziness, or light-headedness prevent {you/SP} from doing any of the following? Attending social activities? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ410d | During the past 12 months, did problems with balance, dizziness, or light-headedness prevent {you/SP} from doing any of the following? Driving or riding in a moving vehicle? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ410e | During the past 12 months, did problems with balance, dizziness, or light-headedness prevent {you/SP} from doing any of the following? Exercising or taking walks? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ410f | During the past 12 months, did problems with balance, dizziness, or light-headedness prevent {you/SP} from doing any of the following? Reading while sitting at rest? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ410g | During the past 12 months, did problems with balance, dizziness, or light-headedness prevent {you/SP} from doing any of the following? Doing routine household chores (cleaning, laundry, etc.)? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ410h | During the past 12 months, did problems with balance, dizziness, or light-headedness prevent {you/SP} from doing any of the following? Standing on your feet for 30 minutes or longer? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ410i | During the past 12 months, did problems with balance, dizziness, or light-headedness prevent {you/SP} from doing any of the following? Walking up or down a flight of stairs? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ420 | During the past 12 months, how much of a problem was {your/his/her} problem with balance, dizziness, or light-headedness? Was it... | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ430 | Think of any time {you have/SP has} had symptoms of dizziness, imbalance, etc.
{Have you/Has SP} ever seen a doctor or other health professional, including emergency room physicians, about {your/his/her} problem(s) with balance, dizziness, or light-headedness? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ440 | How long ago did {you/SP} first see a doctor or other health professional, including emergency room physicians, about {your/his/her} problem(s) with balance, dizziness or light-headedness? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ450 | Did any doctors or health care professionals ever tell {you/SP} the cause or give {you/him/her} a diagnosis for {your/SPs} problem(s) with balance, dizziness or light-headedness? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ460a | Did {your/SP's} doctor(s) or health care professional(s) tell {you/him/her} the cause or causes of {your/his/her} problem(s) with balance, dizziness, or light-headedness was any of the following health conditions? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ460b | Did {your/SP's} doctor(s) or health care professional(s) tell {you/him/her} the cause or causes of {your/his/her} problem(s) with balance, dizziness, or light-headedness was any of the following health conditions? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ460c | Did {your/SP's} doctor(s) or health care professional(s) tell {you/him/her} the cause or causes of {your/his/her} problem(s) with balance, dizziness, or light-headedness was any of the following health conditions? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ460d | Did {your/SP's} doctor(s) or health care professional(s) tell {you/him/her} the cause or causes of {your/his/her} problem(s) with balance, dizziness, or light-headedness was any of the following health conditions? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ460e | Did {your/SP's} doctor(s) or health care professional(s) tell {you/him/her} the cause or causes of {your/his/her} problem(s) with balance, dizziness, or light-headedness was any of the following health conditions? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ460f | Did {your/SP's} doctor(s) or health care professional(s) tell {you/him/her} the cause or causes of {your/his/her} problem(s) with balance, dizziness, or light-headedness was any of the following health conditions? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ460g | Did {your/SP's} doctor(s) or health care professional(s) tell {you/him/her} the cause or causes of {your/his/her} problem(s) with balance, dizziness, or light-headedness was any of the following health conditions? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ460h | Did {your/SP's} doctor(s) or health care professional(s) tell {you/him/her} the cause or causes of {your/his/her} problem(s) with balance, dizziness, or light-headedness was any of the following health conditions? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ460i | Did {your/SP's} doctor(s) or health care professional(s) tell {you/him/her} the cause or causes of {your/his/her} problem(s) with balance, dizziness, or light-headedness was any of the following health conditions? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ470a | Did {your/SP's} doctor(s) or health care professional(s) tell {you/him/her} the cause or causes of {your/his/her} problems with balance, dizziness, or light-headedness was due to any of the following specific reasons? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ470b | Did {your/SP's} doctor(s) or health care professional(s) tell {you/him/her} the cause or causes of {your/his/her} problems with balance, dizziness, or light-headedness was due to any of the following specific reasons? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ470c | Did {your/SP's} doctor(s) or health care professional(s) tell {you/him/her} the cause or causes of {your/his/her} problems with balance, dizziness, or light-headedness was due to any of the following specific reasons? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ470d | Did {your/SP's} doctor(s) or health care professional(s) tell {you/him/her} the cause or causes of {your/his/her} problems with balance, dizziness, or light-headedness was due to any of the following specific reasons? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ470e | Did {your/SP's} doctor(s) or health care professional(s) tell {you/him/her} the cause or causes of {your/his/her} problems with balance, dizziness, or light-headedness was due to any of the following specific reasons? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ470f | Did {your/SP's} doctor(s) or health care professional(s) tell {you/him/her} the cause or causes of {your/his/her} problems with balance, dizziness, or light-headedness was due to any of the following specific reasons? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ470g | Did {your/SP's} doctor(s) or health care professional(s) tell {you/him/her} the cause or causes of {your/his/her} problems with balance, dizziness, or light-headedness was due to any of the following specific reasons? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ470h | Did {your/SP's} doctor(s) or health care professional(s) tell {you/him/her} the cause or causes of {your/his/her} problems with balance, dizziness, or light-headedness was due to any of the following specific reasons? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ470i | Did {your/SP's} doctor(s) or health care professional(s) tell {you/him/her} the cause or causes of {your/his/her} problems with balance, dizziness, or light-headedness was due to any of the following specific reasons? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ470j | Did {your/SP's} doctor(s) or health care professional(s) tell {you/him/her} the cause or causes of {your/his/her} problems with balance, dizziness, or light-headedness was due to any of the following specific reasons? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ480 | {Have you/has SP} ever been treated by a doctor or other health professional for problem(s) with balance, dizziness, or light-headedness? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ490 | {Have you/Has SP} ever tried anything to treat {your/his/her} problem(s) with balance, dizziness, or light-headedness? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ500a | During the past 5 years, {have you/has SP} had or tried any of the following to treat {your/his/her} problem(s) with balance, dizziness, or light-headedness? Please respond for any treatments {you/he/she} tried, whether recommended by a healthcare provider, friend or relative, or the internet. | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ500b | During the past 5 years, {have you/has SP} had or tried any of the following to treat {your/his/her} problem(s) with balance, dizziness, or light-headedness? Please respond for any treatments {you/he/she} tried, whether recommended by a healthcare provider, friend or relative, or the internet. | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ500C | During the past 5 years, {have you/has SP} had or tried any of the following to treat {your/his/her} problem(s) with balance, dizziness, or light-headedness? Please respond for any treatments {you/he/she} tried, whether recommended by a healthcare provider, friend or relative, or the internet. | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ500d | During the past 5 years, {have you/has SP} had or tried any of the following to treat {your/his/her} problem(s) with balance, dizziness, or light-headedness? Please respond for any treatments {you/he/she} tried, whether recommended by a healthcare provider, friend or relative, or the internet. | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ500e | During the past 5 years, {have you/has SP} had or tried any of the following to treat {your/his/her} problem(s) with balance, dizziness, or light-headedness? Please respond for any treatments {you/he/she} tried, whether recommended by a healthcare provider, friend or relative, or the internet. | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ500f | During the past 5 years, {have you/has SP} had or tried any of the following to treat {your/his/her} problem(s) with balance, dizziness, or light-headedness? Please respond for any treatments {you/he/she} tried, whether recommended by a healthcare provider, friend or relative, or the internet. | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ500g | During the past 5 years, {have you/has SP} had or tried any of the following to treat {your/his/her} problem(s) with balance, dizziness, or light-headedness? Please respond for any treatments {you/he/she} tried, whether recommended by a healthcare provider, friend or relative, or the internet. | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ500H | During the past 5 years, {have you/has SP} had or tried any of the following to treat {your/his/her} problem(s) with balance, dizziness, or light-headedness? Please respond for any treatments {you/he/she} tried, whether recommended by a healthcare provider, friend or relative, or the internet. | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ500I | During the past 5 years, {have you/has SP} had or tried any of the following to treat {your/his/her} problem(s) with balance, dizziness, or light-headedness? Please respond for any treatments {you/he/she} tried, whether recommended by a healthcare provider, friend or relative, or the internet. | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ500j | During the past 5 years, {have you/has SP} had or tried any of the following to treat {your/his/her} problem(s) with balance, dizziness, or light-headedness? Please respond for any treatments {you/he/she} tried, whether recommended by a healthcare provider, friend or relative, or the internet. | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ500K | During the past 5 years, {have you/has SP} had or tried any of the following to treat {your/his/her} problem(s) with balance, dizziness, or light-headedness? Please respond for any treatments {you/he/she} tried, whether recommended by a healthcare provider, friend or relative, or the internet. | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ510a | During the past 5 years, {have you/has SP} had or tried any of the following alternative treatments for {your/his/her} problem(s) with balance, dizziness, or light-headedness? Please respond for any treatments {you/he/she} tried, whether recommended by a healthcare provider, friend or relative, or the internet. | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ510b | During the past 5 years, {have you/has SP} had or tried any of the following alternative treatments for {your/his/her} problem(s) with balance, dizziness, or light-headedness? Please respond for any treatments {you/he/she} tried, whether recommended by a healthcare provider, friend or relative, or the internet. | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ510c | During the past 5 years, {have you/has SP} had or tried any of the following alternative treatments for {your/his/her} problem(s) with balance, dizziness, or light-headedness? Please respond for any treatments {you/he/she} tried, whether recommended by a healthcare provider, friend or relative, or the internet. | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ510d | During the past 5 years, {have you/has SP} had or tried any of the following alternative treatments for {your/his/her} problem(s) with balance, dizziness, or light-headedness? Please respond for any treatments {you/he/she} tried, whether recommended by a healthcare provider, friend or relative, or the internet. | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ510e | During the past 5 years, {have you/has SP} had or tried any of the following alternative treatments for {your/his/her} problem(s) with balance, dizziness, or light-headedness? Please respond for any treatments {you/he/she} tried, whether recommended by a healthcare provider, friend or relative, or the internet. | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ510f | During the past 5 years, {have you/has SP} had or tried any of the following alternative treatments for {your/his/her} problem(s) with balance, dizziness, or light-headedness? Please respond for any treatments {you/he/she} tried, whether recommended by a healthcare provider, friend or relative, or the internet. | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ510g | During the past 5 years, {have you/has SP} had or tried any of the following alternative treatments for {your/his/her} problem(s) with balance, dizziness, or light-headedness? Please respond for any treatments {you/he/she} tried, whether recommended by a healthcare provider, friend or relative, or the internet. | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ510h | During the past 5 years, {have you/has SP} had or tried any of the following alternative treatments for {your/his/her} problem(s) with balance, dizziness, or light-headedness? Please respond for any treatments {you/he/she} tried, whether recommended by a healthcare provider, friend or relative, or the internet. | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ510i | During the past 5 years, {have you/has SP} had or tried any of the following alternative treatments for {your/his/her} problem(s) with balance, dizziness, or light-headedness? Please respond for any treatments {you/he/she} tried, whether recommended by a healthcare provider, friend or relative, or the internet. | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ520 | {Do you/Does SP} regularly take medicine that makes (your/his/her} problem(s) with balance, dizziness, or light-headedness worse? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ530 | The next questions are about frequency of falling and associated injuries. By "falling", we mean unexpectedly or unintentionally dropping to a lower surface – the floor or ground– for example, from a standing, seated, walking, or bending position. During the past 5 years, how many times {have you/has SP} fallen? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ540 | During the past 5 years, how often did any of {your/SP's} falls occur just before or around the time {you were/he was/she was} having problem(s) with balance, dizziness, or light-headedness? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ550 | During the past 12 months, how many times {have you/has SP} fallen? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ560 | During the past 12 months, did {you/SP} have an injury that resulted from falling? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ570 | During the past 12 months, how many times {have you/has SP} tripped or slipped, losing {your/his/her} balance, but {were/was} able to regain balance before/without falling? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ580a | {Have you/Has SP} ever had any of the following health problems? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ580b | {Have you/Has SP} ever had any of the following health problems? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ580c | {Have you/Has SP} ever had any of the following health problems? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ580d | {Have you/Has SP} ever had any of the following health problems? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ580e | {Have you/Has SP} ever had any of the following health problems? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ580f | {Have you/Has SP} ever had any of the following health problems? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ580g | {Have you/Has SP} ever had any of the following health problems? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ580h | {Have you/Has SP} ever had any of the following health problems? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ580i | {Have you/Has SP} ever had any of the following health problems? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ580j | {Have you/Has SP} ever had any of the following health problems? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| BAQ580k | {Have you/Has SP} ever had any of the following health problems? | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| SEQN | Respondent sequence number. | BAQ_K_R | Standing Balance | 2019 | 2020 | Questionnaire | RDC Only |
| CFD3NUM | Now I am going to say some more numbers, but when I am through, I want you to repeat them to me in the backwards order.
READ THE THREE NUMBER SEQUENCE TO THE RESPONDENT AT A RATE OF ONE DIGIT PER SECOND. HAVE R REPEAT DIGITS IN THE BACKWARDS ORDER | CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFD5NUM | Now, I am going to say some numbers and when I am through, repeat them to me exactly as I said them. READ THE FIVE NUMBER SEQUENCE TO THE RESPONDENT AT A RATE OF ONE DIGIT PER SECOND.
2, 1, 8, 5, 4. HAVE RESPONDENT REPEAT DIGITS
| CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDALIKE | For this exercise, tell me how an orange and a banana alike? Now tell me another way that they are alike. Yes, they are both fruit. Now, tell me how a ruler and a watch are alike? | CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDCFACE | The next few things I will ask you to do are pencil and paper tasks. PLACE BLANK CLOCK PAPER FROM ALL-IN-ONE BOOKLET AND PEN BEFORE RESPONDENT.
Now, I'd like you to draw a clock. Put in all the numbers and set the time to 10 after 11. (PROMPT IF NECESSARY: Try your best to complete this task without using clues from around the room, such as a clock or a watch.) | CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDCHAND | Clock hands | CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDCHUR1 | This next section tests your memory. I am going to read a list of words that you will have to remember now and later on. Listen carefully. When I am through, tell me as many words as you can remember. It doesn’t matter in what order you say them. Ready?
READ SLOWLY (AT A RATE OF 1 WORD PER SECOND) AND PRONOUNCE CLEARLY: Face, Velvet, Church, Daisy, Red. INSTRUCT RESPONDENT TO REPEAT LIST.
| CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDCHUR2 | I'm going to read the same list for a second time. Try to remember and tell me as many words as you can, including words you said the first time.
READ SLOWLY (AT A RATE OF 1 WORD PER SECOND) AND PRONOUNCE CLEARLY: Face, Velvet, Church, Daisy, Red. INSTRUCT RESPONDENT TO REPEAT LIST. I will ask you to recall these words again later on.
| CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDCHUR3 | I read a list of words to you earlier, which I asked you to repeat and remember. Tell me as many of those words as you can remember. It doesn’t matter in what order you say them.
| CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDCLOCK | Clock drawing - administration | CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDCNUM | Now, I'd like you to draw a clock. Put in all the numbers and set the time to 10 after 11. (PROMPT IF NECESSARY: Try your best to complete this task without using clues from around the room, such as a clock or a watch.)
| CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDDATE2 | Now, tell me the exact date. | CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDFACE1 | This next section tests your memory. I am going to read a list of words that you will have to remember now and later on. Listen carefully. When I am through, tell me as many words as you can remember. It doesn’t matter in what order you say them. Ready?
READ SLOWLY (AT A RATE OF 1 WORD PER SECOND) AND PRONOUNCE CLEARLY: Face, Velvet, Church, Daisy, Red. INSTRUCT RESPONDENT TO REPEAT LIST.
| CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDFACE2 | I'm going to read the same list for a second time. Try to remember and tell me as many words as you can, including words you said the first time.
READ SLOWLY (AT A RATE OF 1 WORD PER SECOND) AND PRONOUNCE CLEARLY: Face, Velvet, Church, Daisy, Red. INSTRUCT RESPONDENT TO REPEAT LIST. I will ask you to recall these words again later on.
| CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDFACE3 | I read a list of words to you earlier, which I asked you to repeat and remember. Tell me as many of those words as you can remember. It doesn’t matter in what order you say them.
| CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDFWCNT | Total of correct words that start with letter F
| CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDMTH2 | The next questions are about problem solving and memory. The questions may seem unusual, but they are routine questions we ask everyone. Some of the questions are very easy and some are difficult, so don’t be surprised if you have trouble with some of them. Try your best to answer all of the questions without using clues from around the room. If you wear glasses for reading, please use them.
Tell me the date today. First, tell me the month. | CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDRED1 | This next section tests your memory. I am going to read a list of words that you will have to remember now and later on. Listen carefully. When I am through, tell me as many words as you can remember. It doesn’t matter in what order you say them. Ready?
READ SLOWLY (AT A RATE OF 1 WORD PER SECOND) AND PRONOUNCE CLEARLY: Face, Velvet, Church, Daisy, Red. INSTRUCT RESPONDENT TO REPEAT LIST. | CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDRED2 | I'm going to read the same list for a second time. Try to remember and tell me as many words as you can, including words you said the first time.
READ SLOWLY (AT A RATE OF 1 WORD PER SECOND) AND PRONOUNCE CLEARLY: Face, Velvet, Church, Daisy, Red. INSTRUCT RESPONDENT TO REPEAT LIST. I will ask you to recall these words again later on.
| CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDRED3 | I read a list of words to you earlier, which I asked you to repeat and remember. Tell me as many of those words as you can remember. It doesn’t matter in what order you say them.
| CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDRHINO | Now, I want you to name this animal. | CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDSDAI1 | This next section tests your memory. I am going to read a list of words that you will have to remember now and later on. Listen carefully. When I am through, tell me as many words as you can remember. It doesn’t matter in what order you say them. Ready?
READ SLOWLY (AT A RATE OF 1 WORD PER SECOND) AND PRONOUNCE CLEARLY: Face, Velvet, Church, Daisy, Red. INSTRUCT RESPONDENT TO REPEAT LIST.
| CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDSDAI2 | I'm going to read the same list for a second time. Try to remember and tell me as many words as you can, including words you said the first time.
READ SLOWLY (AT A RATE OF 1 WORD PER SECOND) AND PRONOUNCE CLEARLY: Face, Velvet, Church, Daisy, Red. INSTRUCT RESPONDENT TO REPEAT LIST. I will ask you to recall these words again later on.
| CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDSDAI3 | I read a list of words to you earlier, which I asked you to repeat and remember. Tell me as many of those words as you can remember. It doesn’t matter in what order you say them.
| CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDSENT | I am going to read you a sentence. Repeat it after me, exactly as I say it. (PAUSE)
READ SENTENCE: The cat always hid under the couch when dogs were in the room.
HAVE R REPEAT SENTENCE.
| CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDSTAT | CFQ Section Status | CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDSUB7C | Serial 7s subtractions correct
| CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDSUBT | Now, starting with 100, I would like you to subtract 7 and then keep counting down by 7. (YOU CAN REPEAT THESE INSTRUCTIONS IF NECESSARY.) | CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDSVEL1 | This next section tests your memory. I am going to read a list of words that you will have to remember now and later on. Listen carefully. When I am through, tell me as many words as you can remember. It doesn’t matter in what order you say them. Ready?
READ SLOWLY (AT A RATE OF 1 WORD PER SECOND) AND PRONOUNCE CLEARLY: Face, Velvet, Church, Daisy, Red. INSTRUCT RESPONDENT TO REPEAT LIST.
| CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDSVEL2 | I'm going to read the same list for a second time. Try to remember and tell me as many words as you can, including words you said the first time.
READ SLOWLY (AT A RATE OF 1 WORD PER SECOND) AND PRONOUNCE CLEARLY: Face, Velvet, Church, Daisy, Red. INSTRUCT RESPONDENT TO REPEAT LIST. I will ask you to recall these words again later on.
| CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDSVEL3 | I read a list of words to you earlier, which I asked you to repeat and remember. Tell me as many of those words as you can remember. It doesn’t matter in what order you say them.
| CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDSWR1 | Word recall trial 1: Total | CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDSWR2 | Word recall trial 2: Total
| CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDSWR3 | Word recall delay: Total
| CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDTIME | CFQ Section time in seconds | CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDTRAIL | PLACE TRAIL PAPER FROM ALL-IN-ONE BOOKLET AND PEN BEFORE RESPONDENT
Take a minute to look over the paper. Notice, there are both numbers and letters. Please draw a line, going from a number to a letter in increasing order. Begin here (POINT TO 1), and draw a line from 1 to A, then from A to 2, and so on. End here (POINT TO E). The first two lines have been drawn for you.
| CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFDWORD | Tell me as many words as you can think of that begin with a certain letter of the alphabet that I will tell you in a moment. You can say any kind of word you want, except for proper nouns and names like Bob or Boston, and numbers or words that begin with the same sound, but have a different ending, for example, love, lover, loving. I will tell you to stop after 1 minute. Are you ready?
| CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFQ575B | Comment: Hearing problem
| CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFQ575C | Comment: Vision problem | CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFQ575D | Comment: Physical limitation affecting writing/drawing | CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFQ575E | Comment: Unable to read/write (literacy) | CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFQ575F | Comment: Does not understand English well
| CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFQ575G | Comment: SP reported cognitive limitation
| CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFQ575H | Comment: Reported taking medications
| CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFQ575I | Comment: SP was restless or fidgety
| CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFQ575J | Comment: SP reported wanting to quit
| CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| CFQ575K | Comment: Interruptions/distraction during testing
| CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| SEQN | Respondent sequence number. | CFQ_K_R | Cognitive Functioning | 2019 | 2020 | Questionnaire | RDC Only |
| LBDRF1LC | 5-Methyl-tetrahydrofolate, RBC comment code | FFMR_K_R | Folate Forms - Total & Individual – Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBDRF2LC | Folic acid, RBC comment code | FFMR_K_R | Folate Forms - Total & Individual – Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBDRF3LC | 5-Formyl-tetrahydrofolate, RBC comment code | FFMR_K_R | Folate Forms - Total & Individual – Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBDRF4LC | Tetrahydrofolate, RBC comment code | FFMR_K_R | Folate Forms - Total & Individual – Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBDRF5LC | 5,10-Methenyl-tetrahydrofolate, RBC comment code | FFMR_K_R | Folate Forms - Total & Individual – Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBDRF6LC | Mefox oxidation product, RBC comment code | FFMR_K_R | Folate Forms - Total & Individual – Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBDRF7SI | Total folate, washed Red Blood Cells (nmol/L) | FFMR_K_R | Folate Forms - Total & Individual – Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBXRF1SI | 5-Methyl-tetrahydrofolate, RBC (nmol/L) | FFMR_K_R | Folate Forms - Total & Individual – Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBXRF2SI | Folic acid, RBC (nmol/L) | FFMR_K_R | Folate Forms - Total & Individual – Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBXRF3SI | 5-Formyl-tetrahydrofolate, RBC (nmol/L) | FFMR_K_R | Folate Forms - Total & Individual – Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBXRF4SI | Tetrahydrofolate, RBC (nmol/L) | FFMR_K_R | Folate Forms - Total & Individual – Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBXRF5SI | 5,10-Methenyl-tetrahydrofolate, RBC (nmol/L) | FFMR_K_R | Folate Forms - Total & Individual – Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBXRF6SI | Mefox oxidation product, RBC (nmol/L) | FFMR_K_R | Folate Forms - Total & Individual – Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| SEQN | Respondent sequence number. | FFMR_K_R | Folate Forms - Total & Individual – Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| INSTANCE | Instance of salt | SUQ_K_R | Salt Use | 2019 | 2020 | Questionnaire | RDC Only |
| IOSALT | Iodized salt? | SUQ_K_R | Salt Use | 2019 | 2020 | Questionnaire | RDC Only |
| SEQN | Respondent sequence number. | SUQ_K_R | Salt Use | 2019 | 2020 | Questionnaire | RDC Only |
| SUD010Q | Now I'll be asking some questions about the types of salt used most often in {your/this} household. May I please see the container for the salt that is usually added to food at the table and the salt that is usually used in cooking or preparing foods. This includes ordinary salt, sea salt, seasoning salts, lite salt and salt substitutes. | SUQ_K_R | Salt Use | 2019 | 2020 | Questionnaire | RDC Only |
| SUD070 | NHANES is studying the salt used in people's homes. I would like to collect about 2 teaspoons of this salt for our study. May I please take a small sample of this salt? | SUQ_K_R | Salt Use | 2019 | 2020 | Questionnaire | RDC Only |
| SUD080 | WAS A SAMPLE OF SALT OBTAINED FOR TESTING? | SUQ_K_R | Salt Use | 2019 | 2020 | Questionnaire | RDC Only |
| SUQ010G | Now I'll be asking some questions about the types of salt used most often in {your/this} household. May I please see the container for the salt that is usually added to food at the table and the salt that is usually used in cooking or preparing foods. This includes ordinary salt, sea salt, seasoning salts, lite salt and salt substitutes. | SUQ_K_R | Salt Use | 2019 | 2020 | Questionnaire | RDC Only |
| SUQ020 | Is this salt used most frequently at the table, in cooking, or do you use it for both? | SUQ_K_R | Salt Use | 2019 | 2020 | Questionnaire | RDC Only |
| SUQ030 | DOES THE PACKAGING MENTION THAT THE SALT IS "LITE", "LOWER SODIUM", "LESS SODIUM", "SODIUM FREE", OR A "SALT SUBSTITUTE"? | SUQ_K_R | Salt Use | 2019 | 2020 | Questionnaire | RDC Only |
| SUQ040 | IS "POTASSIUM CHLORIDE" INCLUDED IN THE INGREDIENT LIST? | SUQ_K_R | Salt Use | 2019 | 2020 | Questionnaire | RDC Only |
| SUQ050 | DOES THE PACKAGING MENTION THAT THE SALT "SUPPLIES IODINE", "SUPPLIES IODIDE", OR IS "IODIZED"? | SUQ_K_R | Salt Use | 2019 | 2020 | Questionnaire | RDC Only |
| SUQ060 | IS THE WORD "IODINE", "IODIDE", OR "IODATE" INCLUDED IN THE NUTRITION FACTS PANEL OR THE INGREDIENT LIST? | SUQ_K_R | Salt Use | 2019 | 2020 | Questionnaire | RDC Only |
| IFD001 | Now I'd like to know about any infant and toddler formulas {SP} had in the past two weeks. May I please see the containers for all the infant and toddler formulas that were fed to {SP} (in the past two weeks)? | IFQF_K_R | Infant Formula Questionnaire File | 2019 | 2020 | Questionnaire | RDC Only |
| IFDCOUNT | Total # of Infant Formulas Taken Formula | IFQF_K_R | Infant Formula Questionnaire File | 2019 | 2020 | Questionnaire | RDC Only |
| IFDMTCH | Matching code | IFQF_K_R | Infant Formula Questionnaire File | 2019 | 2020 | Questionnaire | RDC Only |
| IFNAME | Formula name | IFQF_K_R | Infant Formula Questionnaire File | 2019 | 2020 | Questionnaire | RDC Only |
| IFPID | Formula product ID number | IFQF_K_R | Infant Formula Questionnaire File | 2019 | 2020 | Questionnaire | RDC Only |
| IFQ010 | Infant formula container seen | IFQF_K_R | Infant Formula Questionnaire File | 2019 | 2020 | Questionnaire | RDC Only |
| IFQ055 | For how long has {SP} been fed this formula? | IFQF_K_R | Infant Formula Questionnaire File | 2019 | 2020 | Questionnaire | RDC Only |
| SEQN | Respondent sequence number. | IFQF_K_R | Infant Formula Questionnaire File | 2019 | 2020 | Questionnaire | RDC Only |
| IFBASE | Formula base | IFPI_K_R | Infant Formula Database – Product Information | 2019 | 2020 | Questionnaire | RDC Only |
| IFCONAG | Formula consumer age | IFPI_K_R | Infant Formula Database – Product Information | 2019 | 2020 | Questionnaire | RDC Only |
| IFFORM | Formula form | IFPI_K_R | Infant Formula Database – Product Information | 2019 | 2020 | Questionnaire | RDC Only |
| IFNAME | Formula name | IFPI_K_R | Infant Formula Database – Product Information | 2019 | 2020 | Questionnaire | RDC Only |
| IFPID | Formula product ID number | IFPI_K_R | Infant Formula Database – Product Information | 2019 | 2020 | Questionnaire | RDC Only |
| IFSERQNT | Formula serving quantity | IFPI_K_R | Infant Formula Database – Product Information | 2019 | 2020 | Questionnaire | RDC Only |
| IFSERUNT | Formula serving unit | IFPI_K_R | Infant Formula Database – Product Information | 2019 | 2020 | Questionnaire | RDC Only |
| IFSOURCE | Formula Source | IFPI_K_R | Infant Formula Database – Product Information | 2019 | 2020 | Questionnaire | RDC Only |
| IFTARGET | Formula target | IFPI_K_R | Infant Formula Database – Product Information | 2019 | 2020 | Questionnaire | RDC Only |
| IFVERSON | Formula version | IFPI_K_R | Infant Formula Database – Product Information | 2019 | 2020 | Questionnaire | RDC Only |
| IFNAME | Formula name | IFNI_K_R | Infant Formula Database – Nutrient Information | 2019 | 2020 | Questionnaire | RDC Only |
| IFNID | Nutrient ID number | IFNI_K_R | Infant Formula Database – Nutrient Information | 2019 | 2020 | Questionnaire | RDC Only |
| IFNUNAME | Nutrient name | IFNI_K_R | Infant Formula Database – Nutrient Information | 2019 | 2020 | Questionnaire | RDC Only |
| IFPID | Formula product ID number | IFNI_K_R | Infant Formula Database – Nutrient Information | 2019 | 2020 | Questionnaire | RDC Only |
| NUCAT | Nutrient category | IFNI_K_R | Infant Formula Database – Nutrient Information | 2019 | 2020 | Questionnaire | RDC Only |
| NUOPER | Nutrient Operator | IFNI_K_R | Infant Formula Database – Nutrient Information | 2019 | 2020 | Questionnaire | RDC Only |
| NUQNTY | Nutrient quantity | IFNI_K_R | Infant Formula Database – Nutrient Information | 2019 | 2020 | Questionnaire | RDC Only |
| NUUNIT | Nutrient unit | IFNI_K_R | Infant Formula Database – Nutrient Information | 2019 | 2020 | Questionnaire | RDC Only |
| IFIID | Ingredient ID number | IFII_K_R | Infant Formula Database – Ingredient Information | 2019 | 2020 | Questionnaire | RDC Only |
| IFINNAME | Ingredient name | IFII_K_R | Infant Formula Database – Ingredient Information | 2019 | 2020 | Questionnaire | RDC Only |
| IFNAME | Formula name | IFII_K_R | Infant Formula Database – Ingredient Information | 2019 | 2020 | Questionnaire | RDC Only |
| IFPID | Formula product ID number | IFII_K_R | Infant Formula Database – Ingredient Information | 2019 | 2020 | Questionnaire | RDC Only |
| IFLDID | Label Descriptor ID number | IFLD_K_R | Infant Formula Database – Label Descriptor | 2019 | 2020 | Questionnaire | RDC Only |
| IFLDNAME | Label Descriptor name | IFLD_K_R | Infant Formula Database – Label Descriptor | 2019 | 2020 | Questionnaire | RDC Only |
| IFNAME | Formula name | IFLD_K_R | Infant Formula Database – Label Descriptor | 2019 | 2020 | Questionnaire | RDC Only |
| IFPID | Formula product ID number | IFLD_K_R | Infant Formula Database – Label Descriptor | 2019 | 2020 | Questionnaire | RDC Only |
| LBDP1ALC | Arachidic acid (C20:0) comment code | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBDP1ELC | 11-Eicosenoic acid (C20:1n-9) comment code | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBDP1GLC | Tetracosanoic acid (C24:0) comment code | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBDPANLC | alpha-Linolenic acid (C18:3n-3) comment code | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBDPD3LC | Docosapentaenoic acid 3 (C22:5n-3) comment code | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBDPD6LC | Docosapentaenoic acid (C22:5n-6) comment code | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBDPDALC | Docosanoic acid (C22:0) comment code | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBDPEDLC | 11,14-Eicosadienoic acid (C20:2n6) comment code | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBDPGHLC | homo-gamma-Linolenic acd (C20:3n-6) comment code | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBDPHALC | Docosahexaenoic acid (C22:6n-3) comment code | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBDPLGLC | gamma-Linolenic acid (C18:3n6) comment code | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBDPMRLC | Myristic acid (C14:0) comment code | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBDPNLLC | Linoleic acid (C18:2n-6) comment code | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBDPNRLC | 15-Tetracosenoic acid (C24:1n9) comment code | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBDPOLLC | Oleic acid (C18:1n-9) comment code | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBDPPELC | Eicosapentaenoic acid (C20:5n-3) comment code | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBDPPLLC | Palmitoleic acid (16:1n-7) comment code | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBDPPMLC | Palmitic acid (C16:0) comment code | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBDPRALC | Arachidonic acid (C20:4n-6) comment code | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBDPSTLC | Stearic acid (C18:0) comment code | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBDPTALC | Docosatetraenoic acid (C22:4n-6) comment code | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBXP1A | Arachidic acid (C20:0) (%) | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBXP1E | 11-Eicosenoic acid (C20:1n-9) (%) | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBXP1G | Tetracosanoic acid (C24:0) (%) | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBXPAN | alpha-Linolenic acid (C18:3n-3) (%) | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBXPD3 | Docosapentaenoic acid 3 (C22:5n-3) (%) | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBXPD6 | Docosapentaenoic acid (C22:5n-6) (%) | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBXPDA | Docosanoic acid (C22:0) (%) | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBXPED | 11,14-Eicosadienoic acid (C20:2n6) (%) | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBXPGH | homo-gamma-Linolenic acid(C20:3n-6) (%) | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBXPHA | Docosahexaenoic acid (C22:6n-3) (%) | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBXPLG | gamma-Linolenic acid (C18:3n-6) (%) | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBXPMR | Myristic acid (C14:0) (%) | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBXPNL | Linoleic acid (C18:2n-6) (%) | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBXPNR | 15-Tetracosenoic acid (C24:1n9) (%) | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBXPOL | Oleic acid (C18:1n-9) (%) | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBXPPE | Eicosapentaenoic acid (C20:5n-3) (%) | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBXPPL | Palmitoleic acid (16:1n-7) (%) | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBXPPM | Palmitic acid (C16:0) (%) | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBXPRA | Arachidonic acid (C20:4n-6) (%) | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBXPST | Stearic acid (C18:0) (%) | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBXPTA | Docosatetraenoic acid (C22:4n-6) (%) | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| SEQN | Respondent sequence number. | FAR_K_R | Fatty Acids - Washed RBCs | 2019 | 2020 | Laboratory | RDC Only |
| LBXVC | Hemoglobin Variant C (%) | HBVR_K_R | Hemoglobin Variants | 2019 | 2020 | Laboratory | RDC Only |
| LBXVD | Hemoglobin Variant D (%) | HBVR_K_R | Hemoglobin Variants | 2019 | 2020 | Laboratory | RDC Only |
| LBXVE | Hemoglobin Variant E (%) | HBVR_K_R | Hemoglobin Variants | 2019 | 2020 | Laboratory | RDC Only |
| LBXVF | Hemoglobin Variant F (%) | HBVR_K_R | Hemoglobin Variants | 2019 | 2020 | Laboratory | RDC Only |
| LBXVS | Hemoglobin Variant S (%) | HBVR_K_R | Hemoglobin Variants | 2019 | 2020 | Laboratory | RDC Only |
| LBXVU | Hemoglobin Variant U (%) | HBVR_K_R | Hemoglobin Variants | 2019 | 2020 | Laboratory | RDC Only |
| SEQN | Respondent sequence number. | HBVR_K_R | Hemoglobin Variants | 2019 | 2020 | Laboratory | RDC Only |