| AIALANGA | Language of the MEC ACASI Interview Instrument | P_DEMO | Demographic Variables and Sample Weights | 2017 | 2020 | Demographics | None |
| DMDBORN4 | In what country {were you/was SP} born? | P_DEMO | Demographic Variables and Sample Weights | 2017 | 2020 | Demographics | None |
| 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? | P_DEMO | Demographic Variables and Sample Weights | 2017 | 2020 | Demographics | None |
| DMDMARTZ | Marital status | P_DEMO | Demographic Variables and Sample Weights | 2017 | 2020 | Demographics | None |
| DMDYRUSZ | Length of time the participant has been in the US. | P_DEMO | Demographic Variables and Sample Weights | 2017 | 2020 | Demographics | None |
| FIAINTRP | Was an interpreter used to conduct the Family interview? | P_DEMO | Demographic Variables and Sample Weights | 2017 | 2020 | Demographics | None |
| FIALANG | Language of the Family Interview Instrument | P_DEMO | Demographic Variables and Sample Weights | 2017 | 2020 | Demographics | None |
| FIAPROXY | Was a Proxy respondent used in conducting the Family Interview? | P_DEMO | Demographic Variables and Sample Weights | 2017 | 2020 | Demographics | None |
| INDFMPIR | A ratio of family income to poverty guidelines. | P_DEMO | Demographic Variables and Sample Weights | 2017 | 2020 | Demographics | None |
| MIAINTRP | Was an interpreter used to conduct the MEC CAPI interview? | P_DEMO | Demographic Variables and Sample Weights | 2017 | 2020 | Demographics | None |
| MIALANG | Language of the MEC CAPI Interview Instrument | P_DEMO | Demographic Variables and Sample Weights | 2017 | 2020 | Demographics | None |
| MIAPROXY | Was a Proxy respondent used in conducting the MEC CAPI Interview? | P_DEMO | Demographic Variables and Sample Weights | 2017 | 2020 | Demographics | None |
| RIAGENDR | Gender of the participant. | P_DEMO | Demographic Variables and Sample Weights | 2017 | 2020 | Demographics | None |
| 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). | P_DEMO | Demographic Variables and Sample Weights | 2017 | 2020 | Demographics | None |
| RIDAGEYR | Age in years of the participant at the time of screening. Individuals 80 and over are topcoded at 80 years of age. | P_DEMO | Demographic Variables and Sample Weights | 2017 | 2020 | Demographics | None |
| RIDEXMON | Six month time period when the examination was performed - two categories: November 1 through April 30, May 1 through October 31. | P_DEMO | Demographic Variables and Sample Weights | 2017 | 2020 | Demographics | None |
| RIDEXPRG | Pregnancy status for females between 20 and 44 years of age at the time of MEC exam. | P_DEMO | Demographic Variables and Sample Weights | 2017 | 2020 | Demographics | None |
| RIDRETH1 | Recode of reported race and Hispanic origin information | P_DEMO | Demographic Variables and Sample Weights | 2017 | 2020 | Demographics | None |
| RIDRETH3 | Recode of reported race and Hispanic origin information, with Non-Hispanic Asian Category | P_DEMO | Demographic Variables and Sample Weights | 2017 | 2020 | Demographics | None |
| RIDSTATR | Interview and examination status of the participant. | P_DEMO | Demographic Variables and Sample Weights | 2017 | 2020 | Demographics | None |
| SDDSRVYR | Data release cycle | P_DEMO | Demographic Variables and Sample Weights | 2017 | 2020 | Demographics | None |
| SDMVPSU | Masked variance unit pseudo-PSU variable for variance estimation | P_DEMO | Demographic Variables and Sample Weights | 2017 | 2020 | Demographics | None |
| SDMVSTRA | Masked variance unit pseudo-stratum variable for variance estimation | P_DEMO | Demographic Variables and Sample Weights | 2017 | 2020 | Demographics | None |
| SEQN | Respondent sequence number. | P_DEMO | Demographic Variables and Sample Weights | 2017 | 2020 | Demographics | None |
| SIAINTRP | Was an interpreter used to conduct the Sample Person (SP) interview? | P_DEMO | Demographic Variables and Sample Weights | 2017 | 2020 | Demographics | None |
| SIALANG | Language of the Sample Person Interview Instrument | P_DEMO | Demographic Variables and Sample Weights | 2017 | 2020 | Demographics | None |
| SIAPROXY | Was a Proxy respondent used in conducting the Sample Person (SP) interview? | P_DEMO | Demographic Variables and Sample Weights | 2017 | 2020 | Demographics | None |
| WTINTPRP | Full sample interview weight | P_DEMO | Demographic Variables and Sample Weights | 2017 | 2020 | Demographics | None |
| WTMECPRP | Full sample MEC exam weight | P_DEMO | Demographic Variables and Sample Weights | 2017 | 2020 | Demographics | None |