Table of Contents

Component Description

The objective of the dietary interview component is to obtain detailed dietary intake information from NHANES National Youth Fitness Survey (NNYFS) participants. The dietary intake data are used to estimate the types and amounts of foods and beverages (including all types of water) consumed during the 24-hour period prior to the interview (midnight to midnight), and to estimate intakes of energy, nutrients, and other food components from those foods and beverages. Following the dietary recall, participants are asked questions on salt use, whether the person’s overall intake on the previous day was much more than usual, usual or much less than usual, and whether the respondent is on any type of special diet. The NNYFS dietary interview was conducted in the same manner as the What We Eat in America (WWEIA), NHANES 2011-2012 dietary interview; the format of the dietary intake files are consistent with WWEIA data files.

The NNYFS dietary interview component (like WWEIA, NHANES), is conducted as a partnership between the U.S. Department of Agriculture (USDA) and the U.S. Department of Health and Human Services (DHHS). Under this partnership, DHHS’ National Center for Health Statistics (NCHS) is responsible for the survey sample design and all aspects of data collection and USDA’s Food Surveys Research Group (FSRG) is responsible for the dietary data collection methodology, maintenance of the databases used to code and process the data, and data review and processing.

All NNYFS participants are eligible for one 24-hour dietary recall interview. The dietary recall interview is conducted in-person in the NNYFS Mobile Examination Center (MEC).

The foods and beverages reported in the NNYFS are detailed in the Food and Nutrient Database for Dietary Studies 2011-2012 (FNDDS 2011-2012). The FNDDS 2011-2012 also contains all foods and beverages reported in the WWEIA, NHANES 2011-2012 dietary interview. Two types of dietary intake files are available for NNYFS, 2012: Individual Foods file and Total Nutrient Intakes file.

The What We Eat in America Food Categories, available on the FSRG website (www.ars.usda.gov/ba/bhnrc/fsrg), are a grouping scheme that combines foods and beverages together that have similar usage and nutrient content with the emphasis on how they are commonly consumed in the American diet. The Food Categories include foods reported in WWEIA, NHANES, and NNYFS (“WWEIA Food Categories”). There are approximately 150 unique categories and each is assigned a 4-digit number and description. The WWEIA Food Categories contain discrete food items and are not disaggregated (e.g., pizza vs. grain, cheese, tomatoes, etc.). Designed to be flexible, the categories can be combined as needed to address specific research questions. A new version of the WWEIA Food Categories is produced for each 2-year release cycle of WWEIA, NHANES.

Distinguishing Between Foods/Beverages and Dietary Supplements in NNYFS

The 24-hour dietary supplement use component is administered after the 24-hour dietary recall. All NNYFS participants responding to the 24-hour dietary recall interview are eligible for the dietary supplement and non-prescription antacid use questions. Information is obtained on all vitamins, minerals, herbals, and other dietary supplements as well as non-prescription antacids that were consumed during a 24-hour time period (midnight to midnight), including the name and the amount of supplement or antacid taken.

Distinguishing between foods/beverages and supplements can be challenging. NCHS and FSRG review questionable items reported in the dietary supplement and dietary recall components to resolve disposition of these items into the appropriate component. Products that are labeled as a dietary supplement, that have a supplement facts panel on the label, and are in tablets, capsules, softgels, gelcaps, or other pill forms, are considered dietary supplements. Items that are powders or liquids can be hard to distinguish. General guidelines used state that if powders and liquid concentrates have product directions stating that they be added to a liquid, they are classified as beverages. Examples are teas and protein powders. An exception is made for fiber products, which are classified as dietary supplements. Along this same guideline, energy drinks are considered beverages, but “energy shot” type products are considered dietary supplements.

It is best to refer to the two databases that detail every food/beverage and dietary supplement reported in NNYFS to identify exact determination used. The food and beverage database used for NNYFS is the same as that used for WWEIA, NHANES 2011-2012; the NNYFS dietary supplements database is the same as that used for NHANES dietary supplements use. The databases are:

Dietary Interview Data Files: Two data files were produced from the information collected in the dietary interview: an Individual Foods file and a Total Nutrient Intakes file. The naming convention of the file and variables names is the same as WWEIA, NHANES 2011-2012. The number “1” in the file name identifies the day (and mode) of the interview: 1 = first day (in-person). One day of dietary intake was collected in NNYFS. The file names are as follows:

File Names for Dietary Interview Data
File Day 1
Individual Foods File Y_DR1IFF
Total Nutrient Intakes File Y_DR1TOT

The amounts in these files reflect only nutrients obtained from foods, beverages, and water, including tap and bottled water. They do not include nutrients obtained from dietary supplement intakes, antacids, or medications. Data on intakes of dietary supplement use are available on the NNYFS 2012 Dietary Data page.

Individual Foods File (Y_DR1IFF): Detailed information about each food/beverage item (including the description, amount of, and nutrient content) reported by each participant is included in the Individual Foods file. The variable names are listed in Appendix 1.

The Individual Foods file includes one record for each food/beverage consumed by a survey participant. Each record is uniquely numbered within a person’s set of records and contains the information listed below:

  • Day of the week of the intake
  • Whether the food/beverage was consumed in combination with other foods, such as in a sandwich
  • Time of eating occasion when the food was eaten
  • Eating occasion name
  • Where the food/beverage was obtained
  • Whether the meal/snack was eaten at home or not
  • A USDA FNDDS code identifying the food/beverage
  • Amount of food/beverage consumed, in grams
  • Food energy and 64 nutrients/food components (listed in Appendix 2) for each food/beverage as calculated using USDA’s Food and Nutrient Database for Dietary Studies 2011-2012 (FNDDS 2011-2012)
  • Whether nutrients were calculated directly from the item as identified in FNDDS 2011-2012 or the FNDDS item was modified by adjusting recipe ingredients to more closely match the food/beverage reported

Descriptions for the USDA FNDDS food codes and modification codes (for WWEIA, NHANES 2011-2012 and NNYFS) are provided in two files: the Food Code Description file (DRXFCD_G) and the Modification Code Description file (DRXMCD_G). The DRXFCD_G file is located on the NHANES 2011-2012 Dietary Data site. It includes abbreviated descriptions (up to 80 characters) and complete descriptions (up to 200 characters) associated with each USDA food code in the FNDDS 2011-2012. The DRXMCD_G file is also located on the NHANES 2011-2012 Dietary Data site. It includes descriptions (up to 240 characters) associated with each modification code identified in the Individual Foods file. Modification codes represent adjustments to predefined recipe ingredients that reflect more closely the food as described by the participant. Appendix 3 provides SAS code examples that may be used to link the food code or the modification code description to the Individual Foods file.

Total Nutrient Intakes File (Y_DR1TOT): For each participant, daily total energy and nutrient intakes from foods and beverages, and whether the amount of food consumed was usual, much more than usual, or much less than usual, are included in the Total Nutrient Intakes file. The data file also includes information on salt use in cooking and at the table and whether the participant is currently on any kind of diet to lose weight or for another health-related reason and, if so, the type of diet. The variable names are listed in Appendix 4.

The Total Nutrient Intakes file provides a summary record of daily nutrient intakes for each individual. Each total intake record contains the following information:

  • Day of the week of the intake
  • Type of salt used and how often added at the table and in food preparation
  • Whether the participant is currently on any kind of diet to lose weight or for another health-related reason and, if so, the type of diet
  • Total number of foods and beverages including water reported for that participant for that day’s intake
  • Daily aggregates of food energy and 64 nutrients/food components (listed in Appendix 2) from all foods/beverages as calculated using USDA’s Food and Nutrient Database for Dietary Studies 2011-2012 (FNDDS 2011-2012)
  • Whether the amount of food consumed was usual, much more than usual, or much less than usual
  • Total amount of tap and bottled water consumed (calculated as the sum of reports of water drunk by itself in the 24-hour recall) and the usual source of tap water

Eligible Sample

All NNYFS participants are eligible for the dietary interview component.

Protocol and Procedure

The examination protocol and data collection methods are fully documented in the NNYFS dietary interviewer procedures manual (https://www.cdc.gov/nchs/data/nnyfs/dietary_interview.pdf).

Interviews were conducted for survey participants less than six years of age with a proxy (who was generally the person most knowledgeable about the survey participant’s intake). Interviews of children ages 6 to 8, were conducted with a proxy and with the child present to assist in reporting intake information. Interviews of children ages 9-11, were conducted with the child and the assistance of an adult familiar with the child’s intake. Participants 12-15 years answered for themselves. Dietary interviewers conducted interviews in English and Spanish. Translators were used to conduct interviews in other languages.

The in-person interview was conducted in a private room in the NNYFS mobile examination center (MEC). A set of measuring guides (various glasses, bowls, mugs, drink boxes and bottles, household spoons, measuring cups and spoons, a ruler, thickness sticks, bean bags, and circles) was available in the MEC dietary interview room for the participant to use for reporting amounts of foods (NNYFS Measuring Guides for the Dietary Recall Interview).

Dietary interview data for the NNYFS were collected using USDA’s dietary data collection instrument, the Automated Multiple Pass Method (AMPM) (http://www.ars.usda.gov/ba/bhnrc/fsrg). The AMPM was designed to provide an efficient and accurate means of collecting intakes for large-scale national surveys. The AMPM, which is interviewer-administered, is a fully computerized recall method that uses a 5-step interview outlined below:

  1. Quick List - Participant recalls all foods and beverages consumed the day before the interview (midnight to midnight).
  2. Forgotten Foods - Participant is asked about consumption of foods commonly forgotten during the Quick List step.
  3. Time and Occasion - Time and eating occasion are collected for each food.
  4. Detail Cycle - For each food, a detailed description, amount eaten, and additions to the food are collected. Eating occasions and times between eating occasions are reviewed to elicit forgotten foods.
  5. Final Probe - Additional foods not remembered earlier are collected.

The AMPM includes an extensive compilation of standardized food-specific questions and possible response options. Routing of questions is based on previous responses. The AMPM is updated for each 2-year collection of WWEIA to reflect the changing food supply and to address research needs from the data user community. Additional information about the AMPM is provided in Raper et al. (Raper et al., 2004).

The AMPM was validated in a large study and shown to be an effective method for collecting accurate group energy intake of adults. Completed in 2004, this extensive research project included 524 healthy, weight-stable volunteers, aged 30-69 years. The accuracy of the AMPM was evaluated by comparing reported energy intake (EI) to total energy expenditure (TEE) using the doubly labeled water technique (Moshfegh et al., 2008). Among the findings were that EI compared to TEE was under-reported by 11% overall, by less than 3% for normal weight subjects with body mass index (BMI) < 25 and 16% for overweight subjects with BMI ≥ 25.

Additional studies provide evidence that the AMPM accurately measures group energy intake. Blanton (Blanton et al., 2006) reported that EI was not significantly different from TEE for a sample of 20 adult females. Rumpler and colleagues found that mean EIs were accurately reported for a sample of 12 adult males (Rumpler et al., 2008).

Additional evidence for the accuracy of AMPM has been provided by analysis of the 24-hour urinary sodium data collected in the AMPM Validation Study, which suggests the AMPM is a valid measure for estimating sodium intake in adults. Dietary sodium intake calculated from 24-hour recall data of 465 subjects collected via AMPM was compared with sodium values from 24-hour urine collections measured during the same 24-hour period. The AMPM-derived mean dietary sodium estimates reflected over 90% of the biomarker-based estimates (Rhodes et al., 2013).

For additional information about the dietary interview component and related survey protocols, please go to NNYFS Manuals site at:
https://www.cdc.gov/nchs/nnyfs/manuals.htm.

Quality Assurance & Quality Control

All dietary interviewers were required to complete an intensive one-week training course and to conduct supervised practice interviews before working independently in the field.

Interviewers were monitored throughout the data collection period. Monitoring consisted of the following:

  • Reviews of audio recorded interviews or in-person observations were conducted for approximately 5% of each interviewer's work.
  • Interviews were checked for completeness of the recalls, missing information, inconsistent reports, and unclear notes. Written notification and feedback were provided to the interviewers.

Data Processing and Editing

Interview data files were sent electronically from the field and were imported into Survey Net, a computer-assisted food coding and data management system developed by USDA (Raper et al., 2004).

USDA's Food and Nutrient Database for Dietary Studies (FNDDS) 2011-2012 was used for processing the 2012 NNYFS and WWEIA, NHANES intakes (http://www.ars.usda.gov/ba/bhnrc/fsrg). The FNDDS includes comprehensive information that can be used to code individual foods and portion sizes reported by participants and also includes nutrient values for calculating nutrient intakes. The underlying nutrient values for FNDDS 2011-2012 were based on values in the USDA National Nutrient Database for Standard Reference, release 26, produced by USDA’s Nutrient Data Lab (http://www.ars.usda.gov/nutrientdata). FNDDS values are updated for every 2-year WWEIA, NHANES release cycle.

FNDDS 2011-2012, which corresponds with WWEIA 2011-2012, now includes the addition of enhanced characterization of food and beverages indicating if the item is fortified or contains fortified ingredients. Another enhancement for FNDDS 2011-2012 is the incorporation of the Recipe Protocol Project, which provides a framework for the selection of ingredients and amounts across similar foods. The protocols standardize and modernize new and existing recipes for about 2,500 items in FNDDS 2011-2012. Additional information about the FNDDS and related tools is available on the Food Surveys Research Group website (Raper et al., 2004; Anand et al., 2006; Ahuja et al., 2008).

Coders were required to pass a certification test after the initial training. They were routinely monitored to ensure the quality and completeness of their work. Approximately 10 percent of the coder's work was randomly selected to be independently coded by another coder. Results from the two codings were compared and adjudicated, if necessary.

After intake data were coded, various types of reviews were conducted to ensure the quality of the data. An overview of quality assurance procedures conducted during the data processing stage is available in Anand, et al. (Anand et al., 2006). Examples of reviews include the following:

  • Overall acceptability of each recall. This review determined if the recall met the two minimum criteria listed below. A recall was considered unacceptable if it failed to meet either of these criteria:
    1. The first 4 steps of the 5-step AMPM were completed. Failure to meet this criterion occurs infrequently and is usually due to the participant stopping the interview before completion of the fourth step. This step collects the details (description and amount consumed) for each reported food.
    2. Foods consumed for each reported eating occasion must be identified. A report of an eating occasion with missing foods occurs most often when an adult serving as a proxy, usually for a child, has reported that the survey participant ate a meal, usually at daycare or school, but does not know what was served or how much was consumed (Anand et al., 2006).
  • Interviewers' and coders' questions and comments are reviewed to ensure that they have been accounted for in coding.
  • Decisions are made about how to code new or unusual foods or food quantities reported by participants. 
    Foods/beverages or portions that could not be matched to items in the database were resolved by FSRG scientists. New items and new portion sizes are added as needed to the FNDDS. Information about new foods/beverages and package sizes were collected using internet resources, direct contact with manufacturers, or food labels. Unusual food mixtures were coded using multiple food codes to represent the mixture, linking those foods with a combination food number, and specifying the type of combination.
  • Specific data integrity checks for reasonableness, consistency, and logic.
    Many quality control features are built into the AMPM software, including automated routing based on the participant's previous answers and extensive checks which prevent illogical responses. Nevertheless, over 30 unique checks were conducted across all dietary data.
  • Intakes with extreme levels for individual nutrients.
    Nutrient intakes were reviewed separately for various age and gender groups to determine if corrections were necessary.

During data processing, the following edit was made to ensure the logical consistency and analytic usefulness of the data:

  • Modified nutrient values for some food mixtures.
    During the food coding process, predefined recipes for some food mixtures were modified to match more closely the food as described by the respondent. Nutrients were modified by substituting ingredients in a predefined recipe for the mixture. An example of a modified recipe is spinach cooked with butter instead of margarine. Each modification was assigned a unique 6-digit identification number. Recipe modification numbers appear in the variable DR1MC in the Y_DR1IFF file. Descriptions for each modification are provided in a separate file called DRXMCD_G.
    Starting in 2011, the following foods were not modified because new items are now included in FNDDS 2011-2012 to capture this detail: eggs; fish; macaroni and cheese; oatmeal; rice, select salads—such as potato salad, coleslaw, tuna salad, etc.; rice.

A data processing step called salt adjustment that was based on survey participants' responses to selected questions was discontinued in 2009-2010 (Sebastian et al. 2013; Sebastian et al. 2012). For participants whose households used salt in cooking occasionally or less often, some or all of the salt attributable to home preparation was removed from foods that typically have salt added during preparation and were obtained from the store.
Factors leading to the discontinuation of the data processing step of salt adjustment, include the following:

  • The use of store purchase as a proxy indicator of home preparation is no longer appropriate, due to the proliferation of ready-to-eat, ready-to-heat, and other convenience foods that are available in stores.
  • Results from the AMPM Validation Study demonstrate that the AMPM is a valid measure for estimating sodium intakes at the group level when the data processing step of salt adjustment is not applied. 

For more detail about the data processing step of salt adjustment and its discontinuation, see Sebastian et. al. (Sebastian et al. 2013; Sebastian et al. 2012).

Analytic Notes

The Individual Foods file is comprised of food records. For most survey participants, there are multiple records in the file. In the Total Nutrient Intakes file there is one record for each participant. These files can be linked with other NNYFS files by the respondent sequence number (SEQN).

Variable names: The variable naming convention is consistent with that of the WWEIA, NHANES dietary data files. The number "1" in the third position of the variable name identifies the collection day. One day of intake was collected for NNYFS, thus, variables contain the number "1". For example, the USDA FNDDS food code variable (in the Individual Foods file), which identifies the food reported by the participant, is named DR1IFDCD. Appendices 1 and 4 list the variable names for the Individual Foods file and the Total Nutrient Intakes file, respectively.

Number of days of intake: For NNYFS, only one day of dietary intake interview was conducted. In 2012, 1,518 NNYFS participants provided complete dietary intakes.

Dietary recall status code: A status code (DR1DRSTZ) is used in both the Individual Foods and Total Nutrient Intakes files to indicate the quality and completeness of a survey participant's response to the dietary recall section. The codes are the following:

1 = Reliable and met the minimum criteria

For individuals with a code 1, all relevant variables associated with the 24-hour dietary recall contain a value.

2 = Not reliable or did not meet the minimum criteria

Individuals with a code 2 have incomplete records. No data on total nutrient intakes and the total number of foods reported are provided for these cases. These individuals have no records in the Individual Foods file.

3   [Code 3 is not included in the current datasets. It was only used for data from the NHANES 1999-2000 survey cycle.]

4 = Reported consuming breast milk [Code 4 is not included in the current dataset. No one reported consuming human breast milk.]

5 = Not done

This code is assigned when the dietary recall section of the interview did not take place due to various reasons (such as arrived late/left early, refusal, illness, emergency, or equipment failure). These individuals have no records in the Individual Foods file. These individuals have a record in the Total Nutrients file with values only for the following variables: the respondent sequence number (SEQN) and the dietary recall status code (DR1DRSTZ).

Although there are four possible values, only code 1 appears in the Individual Foods file. In addition to the status code described above, the variable DR1_300 and DR2_300 in the Total Nutrients file, denotes the participant's assessment of whether the amount of food consumed on the recall day was usual, much more than usual, or much less than usual.

Participants who reported consuming only water, no food or other beverages: Records are included in the Individual Foods file for participants who consumed only water. There are no such individuals in the NNYFS dataset.

Participants who reported consuming no water, food or other beverages: There can be survey participants whose intakes are determined to be complete even though they reported no water, food, or other beverage records for the day. For such participants there are no records in the Individual Foods file but their dietary recall status is coded as complete and reliable and the Total Nutrients file will include records with zero values for all nutrients. In the 2012 dataset, there are no such participants.

Number of days between the intake day and the day of family interview: The two intake files include a variable (DR1DBIH) to indicate the number of days between the intake day (i.e., the period covered by the 24-hour recall) and the day that the family questionnaire was administered in the household. A positive value in DR1BHIH indicates the family interview occurred prior to the intake day. In the survey, most of the family interviews were done before the participant came to the MEC and participated in the dietary interview. A value of “0” in DR1BHIH indicates the family interview occurred on the same date as the intake day. A negative value (i.e., DR1BHIH<0) means that the family interview occurred after the intake day.

Food source: The source from which each food was obtained (e.g., from a store, fast food restaurant, cafeteria) is identified by the variable DR1FS in the Individual Foods file.

The code descriptions for this variable are:

Code Descriptions for Source of Food Variable
Code Description
1 Store grocery/supermarket
2 Restaurant with waiter/waitress
3 Restaurant fast food/Pizza
4 Bar/Tavern/Lounge
5 Restaurant, no additional information
6 Cafeteria NOT in a K-12 school
7 Cafeteria in a K-12 school
8 Child care center
9 Family/Adult day care center
10 Soup kitchen/shelter/food pantry facility
11 Meals on Wheels Program
12 Community food program – other
13 Community program, no additional info
14 Vending machine
15 Common coffee pot or snack tray
16 From someone else/gift
17 Mail order purchase
18 Residential dining facility
19 Grown or caught by you or someone you know
20 Fish caught by you or someone you know
24 Sport, recreation, or entertainment
25 Street vendor, vending truck
26 Fundraiser sales
27 Store - convenience type
28 Store - no additional information
91 Other, specify

Eating occasion: The variables DR1_030Z and DR2_030Z are located in the Individual Foods file. The code descriptions for the eating occasion variables are shown in the table below.

Code Descriptions for Eating Occasion Variable
Code Description
1 Breakfast
2 Lunch
3 Dinner
4 Supper
5 Brunch
6 Snack
7 Beverage/Drink
8 Feeding-infant only
9 Extended consumption
10 Desayuno
11 Almuerzo
12 Comida
13 Merienda
14 Cena
15 Entre comida
16 Botana
17 Bocadillo
18 Tentempie
19 Bebida
91 Other

Eating occasion was designated by the respondent. During the interview, a list of eating occasion names was available to the respondent for selection. However, eating occasion names were not defined for the respondent and the interpretation may differ from one person to another.

Foods and beverages coded as part of a combination: Thirty-seven percent of foods and beverages reported in the NNYFS, 2012 dietary interview were identified as items consumed together as combinations. Items consumed as a combination were identified by one of fifteen unique "combination food types". Foods and beverages not coded in combination have the code "0" for the combination food type variable.

The combination types provide a linkage for:

  • Foods or beverages with additions, such as cereal with milk, coffee with cream;
  • Multi-component foods that have specific protocol for collection such as some salads and sandwiches (primarily those that are not from fast food establishments); and
  • Other combinations that do not have a unique code in the FNDDS.

Combination Type, Code, Examples, and Percent of Food and Beverages Reported by Type
Combination Type Code Examples of Combination Type % Items
Not in combination 0 NA 63
Beverage w/ additions 1 Coffee, tea with: milk, cream, sugar. Infant formula with: baby cereal. 3
Cereal w/ additions 2 Cereals (ready-to-eat, cooked, baby) with: milk, sugar, fruit, butter. 5
Bread/baked product w/additions 3 Breads, rolls, pancakes with: butter, jam, syrup, fruit . Cakes, pies with: ice cream, toppings. Crackers with: cheese, dip, peanut butter. 4
Salad 4 Components of salads that do not have a single code in FNDDS. It may also designate additional items to single code salads. 3
Sandwiches 5 Components of sandwiches that do not have a single code in FNDDS. It may also designate additional items added to single code sandwiches. 10
Soup 6 Soup with: crackers, croutons, cheese. <1
Frozen meals 7 Components of a prepackaged frozen meal and additions to the meal. 0
Ice cream/ frozen yogurt w/ additions 8 Ice cream with: syrup, nuts, toppings. <1
Dried beans or Vegetable w/ additions 9 French fries, potatoes with: catsup, gravy, butter, toppings. Beans with: sauce, butter. 2
Fruit w/ additions 10 Fruit with: toppings, milk, honey. Components of fruit mixtures or salads that do not have a single code in FNDDS. <1
Tortilla products 11 Components of tacos and tortilla products that do not have a single code in FNDDS. It may also designate additional items to single code tacos or tortilla products. 1
Meat, Poultry, Fish 12 Meat, poultry, fish with: gravy, sauce, and condiments. 2
Lunchables® 13 Components of pre-packaged lunch kits. <1
Chips w/ additions 14 Potato chips, corn chips with: dip, cheese, salsa. <1
Other mixtures 90 Rice, pasta, spaghetti, eggs, other mixtures with: butter, gravy, sauce, condiments. 3

All items given a combination food type are given an additional variable to identify each of the items within the combination. This variable is the "combination food number" that is unique to the combination food type within the individual intake.  

Variable Labels and Names for Combination Coding
Combination Coding Variable Name
Combination food type DR1CCMTX
Combination food number DR1CCMNM

Special diet: Information on whether the participant is currently on any kind of diet to lose weight or for other health-related reason and, if so, the type of diet, was provided by the variable DRQSDIET identifies whether a participant was on a special diet. The variables DRQSDT1 through DRQSDT12 and DRQSDT91 identify the type of diet(s) that the participant was following. These variables can be found in the Total Nutrient Intakes file.

Note: A participant could report more than one type of diet, and all the responses were recorded.

Sample weights for NNYFS dietary intake data: Sample weights are constructed that encompass the unequal probabilities of selection, as well as adjustments for non-participation by selected sample persons. In order to produce national, representative estimates, the appropriate sample weights must be used. Please refer to the NNYFS Analytic Guidelines for details on the sample design and analytic guidance for the NNYFS data: https://www.cdc.gov/nchs/nnyfs/analytic_guidelines.htm.

For the 2012 NNYFS, there were 1,640 persons selected; of these 1,576 were interviewed and examined in the MEC. 1,518 of the MEC participants provided a complete dietary intake.

Most analyses of NNYFS data use data collected in the MEC and the variable WTMEC should be used for the sample weights. However, for the NNYFS dietary data, different sample weights are recommended for analysis. Although attempts are made to schedule MEC exams uniformly throughout the week, proportionally more exams occur on weekend days than on weekdays. Because food intake can vary by day of the week, use of the MEC weights would disproportionately represent intakes on weekends.

A set of weights (WTDRD1) is provided that should be used when an analysis uses the Day 1 dietary recall data (either alone or when Day 1 nutrient data are used in conjunction with MEC data). The set of weights (WTDRD1) is applicable to the 1,518 participants with Day 1 data. Day 1 weights were constructed by taking the MEC sample weights (WTMEC) and further adjusting for (a) the additional non-response and (b) the differential allocation by day of the week for the dietary intake data collection. These Day 1 weights are more variable than the MEC weights, and the sample size is smaller, so estimated standard errors using Day 1 data and Day 1 weights are larger than standard errors for similar estimates based on MEC weights.

Note that all sample weights are person-level weights and the set of dietary weights should sum to the same population control total as the MEC weights (WTMEC).

References

Codebook and Frequencies

SEQN - Respondent sequence number

Variable Name:
SEQN
SAS Label:
Respondent sequence number
English Text:
Respondent sequence number.
Target:
Both males and females 3 YEARS - 15 YEARS

WTDRD1 - Dietary day one sample weight

Variable Name:
WTDRD1
SAS Label:
Dietary day one sample weight
English Text:
Dietary day one sample weight
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
6764.1429025 to 181231.07796 Range of Values 1518 1518
. Missing 58 1576

DR1DRSTZ - Dietary recall status

Variable Name:
DR1DRSTZ
SAS Label:
Dietary recall status
English Text:
Dietary recall status
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Reliable and met the minimum criteria 1518 1518
2 Not reliable or not met the minimum criteria 12 1530
4 Reported consuming breast-milk 0 1530
5 Not done 46 1576
. Missing 0 1576

DR1EXMER - Interviewer ID code

Variable Name:
DR1EXMER
SAS Label:
Interviewer ID code
English Text:
Interviewer ID code
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 to 91 Range of Values 1530 1530
. Missing 46 1576

DR1DBIH - # of days b/w intake and HH interview

Variable Name:
DR1DBIH
SAS Label:
# of days b/w intake and HH interview
English Text:
Number of days between intake day and the day of family questionnaire administered in the household.
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
-3 to 74 Range of Values 1530 1530
. Missing 46 1576

DR1DAY - Intake day of the week

Variable Name:
DR1DAY
SAS Label:
Intake day of the week
English Text:
Intake day of the week
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Sunday 274 274
2 Monday 137 411
3 Tuesday 134 545
4 Wednesday 133 678
5 Thursday 149 827
6 Friday 370 1197
7 Saturday 333 1530
. Missing 46 1576

DR1LANG - Language respondent used mostly

Variable Name:
DR1LANG
SAS Label:
Language respondent used mostly
English Text:
The respondent spoke mostly:
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 English 1352 1352
2 Spanish 84 1436
3 English and Spanish 78 1514
4 Other 1 1515
. Missing 61 1576

DR1MNRSP - Main respondent for this interview

Variable Name:
DR1MNRSP
SAS Label:
Main respondent for this interview
English Text:
Who was the main respondent for this interview?
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 SP 866 866
2 Mother of SP 522 1388
3 Father of SP 90 1478
4 Wife of SP 0 1478
5 Husband of SP 0 1478
6 Daughter of SP 0 1478
7 Son of SP 0 1478
8 Grandparent of SP 15 1493
9 Friend, Partner, Non Relative 0 1493
10 Translator, not a HH member 0 1493
11 Child care provider, Caretaker 1 1494
12 Other Relative 12 1506
14 Other specify 0 1506
77 Refused 0 1506
99 Don't know 0 1506
. Missing 70 1576

DR1HELPD - Helped in responding for this interview

Variable Name:
DR1HELPD
SAS Label:
Helped in responding for this interview
English Text:
Who helped in responding for this interview
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 SP 335 335
2 Mother of SP 316 651
3 Father of SP 95 746
4 Wife of SP 0 746
5 Husband of SP 0 746
6 Daughter of SP 0 746
7 Son of SP 0 746
8 Grandparent of SP 17 763
9 Friend, Partner, Non Relative 2 765
10 Translator, not a HH member 2 767
11 Child care provider, Caretaker 4 771
12 Other Relative 11 782
13 No one 726 1508
14 Other specify 7 1515
77 Refused 0 1515
99 Don't know 0 1515
. Missing 61 1576

DBQ095Z - Type of table salt used

Variable Name:
DBQ095Z
SAS Label:
Type of table salt used
English Text:
What type of salt {do you/does SP} usually add to {your/his/her/SP's} food at the table? Would you say . . .
English Instructions:
CAPI INSTRUCTION: IF SP AGE <= 5, DISPLAY "DO YOU" FOR FIRST DISPLAY AND {SP'S} FOR SECOND DISPLAY.
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Ordinary salt [includes regular iodized salt, sea salt and seasoning salts made with regular salt] 782 782
2 Lite salt 61 843
3 Salt substitute 18 861
4 Doesn't use or add salt products at the table 651 1512 DRQSPREP
91 Other 0 1512
99 Don't know 18 1530 DRQSPREP
. Missing 46 1576

DBD100 - How often add salt to food at table

Variable Name:
DBD100
SAS Label:
How often add salt to food at table
English Text:
How often {do you/does SP} add ordinary salt to {your/his/her/SP's} food at the table? Would you say . . .
English Instructions:
CAPI INSTRUCTION: IF SP AGE <= 5, DISPLAY "DO YOU" FOR FIRST DISPLAY AND {SP'S} FOR SECOND DISPLAY.
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Rarely 533 533
2 Occasionally 242 775
3 Very often 86 861
7 Refused 0 861
9 Don't know 0 861
. Missing 715 1576

DRQSPREP - Salt used in preparation?

Variable Name:
DRQSPREP
SAS Label:
Salt used in preparation?
English Text:
How often is ordinary salt or seasoned salt added in cooking or preparing foods in your household? Is it never, rarely, occasionally, or very often?
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Never 69 69
2 Rarely 280 349
3 Occasionally 603 952
4 Very Often 558 1510
9 Don't know 20 1530
. Missing 46 1576

DR1STY - Salt used at table yesterday?

Variable Name:
DR1STY
SAS Label:
Salt used at table yesterday?
English Text:
Did you add any salt to your food at the table yesterday? Salt includes ordinary or seasoned salt, lite salt or a salt substitute.
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes 140 140
2 No 1383 1523 DRQSDIET
9 Don't know 7 1530 DRQSDIET
. Missing 46 1576

DR1SKY - Kind of table salt used yesterday

Variable Name:
DR1SKY
SAS Label:
Kind of table salt used yesterday
English Text:
What type of salt was it? (Was it ordinary or seasoned salt, lite salt, or a salt substitute?)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Ordinary, sea, seasoned, or other flavored salt 127 127
2 Lite salt 8 135
3 Salt substitute 2 137
91 Other 1 138
99 Don't know 2 140
. Missing 1436 1576

DRQSDIET - On special diet?

Variable Name:
DRQSDIET
SAS Label:
On special diet?
English Text:
Are you currently on any kind of diet, either to lose weight or for some other health-related reason?
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes 68 68
2 No 1455 1523 DR1TNUMF
9 Don't know 7 1530 DR1TNUMF
. Missing 46 1576

DRQSDT1 - Weight loss/Low calorie diet

Variable Name:
DRQSDT1
SAS Label:
Weight loss/Low calorie diet
English Text:
What kind of diet are you on? (Is it a weight loss or low calorie diet: low fat or cholesterol diet; low salt or sodium diet; sugar free or low sugar diet; low fiber diet; high fiber diet; diabetic diet; or another type of diet?)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Weight loss or low calorie diets 51 51
. Missing 1525 1576

DRQSDT2 - Low fat/Low cholesterol diet

Variable Name:
DRQSDT2
SAS Label:
Low fat/Low cholesterol diet
English Text:
What kind of diet are you on? (Is it a weight loss or low calorie diet: low fat or cholesterol diet; low salt or sodium diet; sugar free or low sugar diet; low fiber diet; high fiber diet; diabetic diet; or another type of diet?)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
2 Low fat or low cholesterol diet 3 3
. Missing 1573 1576

DRQSDT3 - Low salt/Low sodium diet

Variable Name:
DRQSDT3
SAS Label:
Low salt/Low sodium diet
English Text:
What kind of diet are you on? (Is it a weight loss or low calorie diet: low fat or cholesterol diet; low salt or sodium diet; sugar free or low sugar diet; low fiber diet; high fiber diet; diabetic diet; or another type of diet?)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
3 Low salt or low sodium diet (including diet to lower blood pressure or hypertension) 0 0
. Missing 1576 1576

DRQSDT4 - Sugar free/Low sugar diet

Variable Name:
DRQSDT4
SAS Label:
Sugar free/Low sugar diet
English Text:
What kind of diet are you on? (Is it a weight loss or low calorie diet: low fat or cholesterol diet; low salt or sodium diet; sugar free or low sugar diet; low fiber diet; high fiber diet; diabetic diet; or another type of diet?)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
4 Sugar free or low sugar diet 2 2
. Missing 1574 1576

DRQSDT5 - Low fiber diet

Variable Name:
DRQSDT5
SAS Label:
Low fiber diet
English Text:
What kind of diet are you on? (Is it a weight loss or low calorie diet: low fat or cholesterol diet; low salt or sodium diet; sugar free or low sugar diet; low fiber diet; high fiber diet; diabetic diet; or another type of diet?)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
5 Low fiber or low residue diet 0 0
. Missing 1576 1576

DRQSDT6 - High fiber diet

Variable Name:
DRQSDT6
SAS Label:
High fiber diet
English Text:
What kind of diet are you on? (Is it a weight loss or low calorie diet: low fat or cholesterol diet; low salt or sodium diet; sugar free or low sugar diet; low fiber diet; high fiber diet; diabetic diet; or another type of diet?)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
6 High fiber or high residue diet 1 1
. Missing 1575 1576

DRQSDT7 - Diabetic diet

Variable Name:
DRQSDT7
SAS Label:
Diabetic diet
English Text:
What kind of diet are you on? (Is it a weight loss or low calorie diet: low fat or cholesterol diet; low salt or sodium diet; sugar free or low sugar diet; low fiber diet; high fiber diet; diabetic diet; or another type of diet?)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
7 Diabetic diet (including gestational diabetic diets) 0 0
. Missing 1576 1576

DRQSDT8 - Weight gain/Muscle building diet

Variable Name:
DRQSDT8
SAS Label:
Weight gain/Muscle building diet
English Text:
What kind of diet are you on? (Is it a weight loss or low calorie diet: low fat or cholesterol diet; low salt or sodium diet; sugar free or low sugar diet; low fiber diet; high fiber diet; diabetic diet; or another type of diet?)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
8 Weight gain/Muscle building diet 4 4
. Missing 1572 1576

DRQSDT9 - Low carbohydrate diet

Variable Name:
DRQSDT9
SAS Label:
Low carbohydrate diet
English Text:
What kind of diet are you on? (Is it a weight loss or low calorie diet: low fat or cholesterol diet; low salt or sodium diet; sugar free or low sugar diet; low fiber diet; high fiber diet; diabetic diet; or another type of diet?)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
9 Low carbohydrate diet 0 0
. Missing 1576 1576

DRQSDT10 - High protein diet

Variable Name:
DRQSDT10
SAS Label:
High protein diet
English Text:
What kind of diet are you on? (Is it a weight loss or low calorie diet: low fat or cholesterol diet; low salt or sodium diet; sugar free or low sugar diet; low fiber diet; high fiber diet; diabetic diet; or another type of diet?)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
10 High protein diet 2 2
. Missing 1574 1576

DRQSDT11 - Gluten-free/Celiac diet

Variable Name:
DRQSDT11
SAS Label:
Gluten-free/Celiac diet
English Text:
What kind of diet are you on? (Is it a weight loss or low calorie diet: low fat or cholesterol diet; low salt or sodium diet; sugar free or low sugar diet; low fiber diet; high fiber diet; diabetic diet; or another type of diet?)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
11 Gluten-free/Celiac diet 3 3
. Missing 1573 1576

DRQSDT12 - Renal/Kidney diet

Variable Name:
DRQSDT12
SAS Label:
Renal/Kidney diet
English Text:
What kind of diet are you on? (Is it a weight loss or low calorie diet: low fat or cholesterol diet; low salt or sodium diet; sugar free or low sugar diet; low fiber diet; high fiber diet; diabetic diet; or another type of diet?)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
12 Renal/Kidney diet 0 0
. Missing 1576 1576

DRQSDT91 - Other special diet

Variable Name:
DRQSDT91
SAS Label:
Other special diet
English Text:
What kind of diet are you on? (Is it a weight loss or low calorie diet: low fat or cholesterol diet; low salt or sodium diet; sugar free or low sugar diet; low fiber diet; high fiber diet; diabetic diet; or another type of diet?)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
91 Other special diet 8 8
. Missing 1568 1576

DR1TNUMF - Number of foods reported

Variable Name:
DR1TNUMF
SAS Label:
Number of foods reported
English Text:
Total number of foods reported in the individual foods file
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
2 to 34 Range of Values 1518 1518
. Missing 58 1576

DR1TKCAL - Energy (kcal)

Variable Name:
DR1TKCAL
SAS Label:
Energy (kcal)
English Text:
Energy (kcal)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
257 to 5265 Range of Values 1518 1518
. Missing 58 1576

DR1TPROT - Protein (gm)

Variable Name:
DR1TPROT
SAS Label:
Protein (gm)
English Text:
Protein (gm)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
4.18 to 241.84 Range of Values 1518 1518
. Missing 58 1576

DR1TCARB - Carbohydrate (gm)

Variable Name:
DR1TCARB
SAS Label:
Carbohydrate (gm)
English Text:
Carbohydrate (gm)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
28.22 to 677.09 Range of Values 1518 1518
. Missing 58 1576

DR1TSUGR - Total sugars (gm)

Variable Name:
DR1TSUGR
SAS Label:
Total sugars (gm)
English Text:
Total sugars (gm)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 to 405.49 Range of Values 1518 1518
. Missing 58 1576

DR1TFIBE - Dietary fiber (gm)

Variable Name:
DR1TFIBE
SAS Label:
Dietary fiber (gm)
English Text:
Dietary fiber (gm)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 to 60.3 Range of Values 1518 1518
. Missing 58 1576

DR1TTFAT - Total fat (gm)

Variable Name:
DR1TTFAT
SAS Label:
Total fat (gm)
English Text:
Total fat (gm)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1.7 to 235.2 Range of Values 1518 1518
. Missing 58 1576

DR1TSFAT - Total saturated fatty acids (gm)

Variable Name:
DR1TSFAT
SAS Label:
Total saturated fatty acids (gm)
English Text:
Total saturated fatty acids (gm)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.469 to 82.839 Range of Values 1518 1518
. Missing 58 1576

DR1TMFAT - Total monounsaturated fatty acids (gm)

Variable Name:
DR1TMFAT
SAS Label:
Total monounsaturated fatty acids (gm)
English Text:
Total monounsaturated fatty acids (gm)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.707 to 88.359 Range of Values 1518 1518
. Missing 58 1576

DR1TPFAT - Total polyunsaturated fatty acids (gm)

Variable Name:
DR1TPFAT
SAS Label:
Total polyunsaturated fatty acids (gm)
English Text:
Total polyunsaturated fatty acids (gm)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.387 to 74.075 Range of Values 1518 1518
. Missing 58 1576

DR1TCHOL - Cholesterol (mg)

Variable Name:
DR1TCHOL
SAS Label:
Cholesterol (mg)
English Text:
Cholesterol (mg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 1239 Range of Values 1518 1518
. Missing 58 1576

DR1TATOC - Vitamin E as alpha-tocopherol (mg)

Variable Name:
DR1TATOC
SAS Label:
Vitamin E as alpha-tocopherol (mg)
English Text:
Vitamin E as alpha-tocopherol (mg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.12 to 58.21 Range of Values 1518 1518
. Missing 58 1576

DR1TATOA - Added alpha-tocopherol (Vitamin E) (mg)

Variable Name:
DR1TATOA
SAS Label:
Added alpha-tocopherol (Vitamin E) (mg)
English Text:
Added alpha-tocopherol (Vitamin E) (mg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 28.97 Range of Values 1518 1518
. Missing 58 1576

DR1TRET - Retinol (mcg)

Variable Name:
DR1TRET
SAS Label:
Retinol (mcg)
English Text:
Retinol (mcg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 2429 Range of Values 1518 1518
. Missing 58 1576

DR1TVARA - Vitamin A, RAE (mcg)

Variable Name:
DR1TVARA
SAS Label:
Vitamin A, RAE (mcg)
English Text:
Vitamin A as retinol activity equivalents (mcg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
3 to 4510 Range of Values 1518 1518
. Missing 58 1576

DR1TACAR - Alpha-carotene (mcg)

Variable Name:
DR1TACAR
SAS Label:
Alpha-carotene (mcg)
English Text:
Alpha-carotene (mcg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 10314 Range of Values 1518 1518
. Missing 58 1576

DR1TBCAR - Beta-carotene (mcg)

Variable Name:
DR1TBCAR
SAS Label:
Beta-carotene (mcg)
English Text:
Beta-carotene (mcg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 50575 Range of Values 1518 1518
. Missing 58 1576

DR1TCRYP - Beta-cryptoxanthin (mcg)

Variable Name:
DR1TCRYP
SAS Label:
Beta-cryptoxanthin (mcg)
English Text:
Beta-cryptoxanthin (mcg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 1717 Range of Values 1518 1518
. Missing 58 1576

DR1TLYCO - Lycopene (mcg)

Variable Name:
DR1TLYCO
SAS Label:
Lycopene (mcg)
English Text:
Lycopene (mcg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 90414 Range of Values 1518 1518
. Missing 58 1576

DR1TLZ - Lutein + zeaxanthin (mcg)

Variable Name:
DR1TLZ
SAS Label:
Lutein + zeaxanthin (mcg)
English Text:
Lutein + zeaxanthin (mcg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 92372 Range of Values 1518 1518
. Missing 58 1576

DR1TVB1 - Thiamin (Vitamin B1) (mg)

Variable Name:
DR1TVB1
SAS Label:
Thiamin (Vitamin B1) (mg)
English Text:
Thiamin (Vitamin B1) (mg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.038 to 6.245 Range of Values 1518 1518
. Missing 58 1576

DR1TVB2 - Riboflavin (Vitamin B2) (mg)

Variable Name:
DR1TVB2
SAS Label:
Riboflavin (Vitamin B2) (mg)
English Text:
Riboflavin (Vitamin B2) (mg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.026 to 7.136 Range of Values 1518 1518
. Missing 58 1576

DR1TNIAC - Niacin (mg)

Variable Name:
DR1TNIAC
SAS Label:
Niacin (mg)
English Text:
Niacin (mg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1.265 to 80.779 Range of Values 1518 1518
. Missing 58 1576

DR1TVB6 - Vitamin B6 (mg)

Variable Name:
DR1TVB6
SAS Label:
Vitamin B6 (mg)
English Text:
Vitamin B6 (mg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.071 to 9.982 Range of Values 1518 1518
. Missing 58 1576

DR1TFOLA - Total folate (mcg)

Variable Name:
DR1TFOLA
SAS Label:
Total folate (mcg)
English Text:
Total folate (mcg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
10 to 2127 Range of Values 1518 1518
. Missing 58 1576

DR1TFA - Folic acid (mcg)

Variable Name:
DR1TFA
SAS Label:
Folic acid (mcg)
English Text:
Folic acid (mcg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 1923 Range of Values 1518 1518
. Missing 58 1576

DR1TFF - Food folate (mcg)

Variable Name:
DR1TFF
SAS Label:
Food folate (mcg)
English Text:
Food folate (mcg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 862 Range of Values 1518 1518
. Missing 58 1576

DR1TFDFE - Folate, DFE (mcg)

Variable Name:
DR1TFDFE
SAS Label:
Folate, DFE (mcg)
English Text:
Folate as dietary folate equivalents (mcg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
12 to 3471 Range of Values 1518 1518
. Missing 58 1576

DR1TCHL - Total choline (mg)

Variable Name:
DR1TCHL
SAS Label:
Total choline (mg)
English Text:
Total choline (mg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
8.9 to 953.1 Range of Values 1518 1518
. Missing 58 1576

DR1TVB12 - Vitamin B12 (mcg)

Variable Name:
DR1TVB12
SAS Label:
Vitamin B12 (mcg)
English Text:
Vitamin B12 (mcg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 30.13 Range of Values 1518 1518
. Missing 58 1576

DR1TB12A - Added vitamin B12 (mcg)

Variable Name:
DR1TB12A
SAS Label:
Added vitamin B12 (mcg)
English Text:
Added vitamin B12 (mcg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 22.74 Range of Values 1518 1518
. Missing 58 1576

DR1TVC - Vitamin C (mg)

Variable Name:
DR1TVC
SAS Label:
Vitamin C (mg)
English Text:
Vitamin C (mg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 723.7 Range of Values 1518 1518
. Missing 58 1576

DR1TVD - Vitamin D (D2 + D3) (mcg)

Variable Name:
DR1TVD
SAS Label:
Vitamin D (D2 + D3) (mcg)
English Text:
Vitamin D (D2 + D3) (mcg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 38.4 Range of Values 1518 1518
. Missing 58 1576

DR1TVK - Vitamin K (mcg)

Variable Name:
DR1TVK
SAS Label:
Vitamin K (mcg)
English Text:
Vitamin K (mcg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1.1 to 4261.3 Range of Values 1518 1518
. Missing 58 1576

DR1TCALC - Calcium (mg)

Variable Name:
DR1TCALC
SAS Label:
Calcium (mg)
English Text:
Calcium (mg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
23 to 3792 Range of Values 1518 1518
. Missing 58 1576

DR1TPHOS - Phosphorus (mg)

Variable Name:
DR1TPHOS
SAS Label:
Phosphorus (mg)
English Text:
Phosphorus (mg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
50 to 4380 Range of Values 1518 1518
. Missing 58 1576

DR1TMAGN - Magnesium (mg)

Variable Name:
DR1TMAGN
SAS Label:
Magnesium (mg)
English Text:
Magnesium (mg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
15 to 887 Range of Values 1518 1518
. Missing 58 1576

DR1TIRON - Iron (mg)

Variable Name:
DR1TIRON
SAS Label:
Iron (mg)
English Text:
Iron (mg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.96 to 60.23 Range of Values 1518 1518
. Missing 58 1576

DR1TZINC - Zinc (mg)

Variable Name:
DR1TZINC
SAS Label:
Zinc (mg)
English Text:
Zinc (mg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.42 to 49.23 Range of Values 1518 1518
. Missing 58 1576

DR1TCOPP - Copper (mg)

Variable Name:
DR1TCOPP
SAS Label:
Copper (mg)
English Text:
Copper (mg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.035 to 4.797 Range of Values 1518 1518
. Missing 58 1576

DR1TSODI - Sodium (mg)

Variable Name:
DR1TSODI
SAS Label:
Sodium (mg)
English Text:
Sodium (mg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
268 to 9456 Range of Values 1518 1518
. Missing 58 1576

DR1TPOTA - Potassium (mg)

Variable Name:
DR1TPOTA
SAS Label:
Potassium (mg)
English Text:
Potassium (mg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
190 to 7090 Range of Values 1518 1518
. Missing 58 1576

DR1TSELE - Selenium (mcg)

Variable Name:
DR1TSELE
SAS Label:
Selenium (mcg)
English Text:
Selenium (mcg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
3.3 to 421.5 Range of Values 1518 1518
. Missing 58 1576

DR1TCAFF - Caffeine (mg)

Variable Name:
DR1TCAFF
SAS Label:
Caffeine (mg)
English Text:
Caffeine (mg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 437 Range of Values 1518 1518
. Missing 58 1576

DR1TTHEO - Theobromine (mg)

Variable Name:
DR1TTHEO
SAS Label:
Theobromine (mg)
English Text:
Theobromine (mg)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 1173 Range of Values 1518 1518
. Missing 58 1576

DR1TALCO - Alcohol (gm)

Variable Name:
DR1TALCO
SAS Label:
Alcohol (gm)
English Text:
Alcohol (gm)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 24.9 Range of Values 1518 1518
. Missing 58 1576

DR1TMOIS - Moisture (gm)

Variable Name:
DR1TMOIS
SAS Label:
Moisture (gm)
English Text:
Moisture (gm)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
350.94 to 9608.11 Range of Values 1518 1518
. Missing 58 1576

DR1TS040 - SFA 4:0 (Butanoic) (gm)

Variable Name:
DR1TS040
SAS Label:
SFA 4:0 (Butanoic) (gm)
English Text:
SFA 4:0 (Butanoic) (gm)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 3.57 Range of Values 1518 1518
. Missing 58 1576

DR1TS060 - SFA 6:0 (Hexanoic) (gm)

Variable Name:
DR1TS060
SAS Label:
SFA 6:0 (Hexanoic) (gm)
English Text:
SFA 6:0 (Hexanoic) (gm)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 1.982 Range of Values 1518 1518
. Missing 58 1576

DR1TS080 - SFA 8:0 (Octanoic) (gm)

Variable Name:
DR1TS080
SAS Label:
SFA 8:0 (Octanoic) (gm)
English Text:
SFA 8:0 (Octanoic) (gm)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 9.98 Range of Values 1518 1518
. Missing 58 1576

DR1TS100 - SFA 10:0 (Decanoic) (gm)

Variable Name:
DR1TS100
SAS Label:
SFA 10:0 (Decanoic) (gm)
English Text:
SFA 10:0 (Decanoic) (gm)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 6.924 Range of Values 1518 1518
. Missing 58 1576

DR1TS120 - SFA 12:0 (Dodecanoic) (gm)

Variable Name:
DR1TS120
SAS Label:
SFA 12:0 (Dodecanoic) (gm)
English Text:
SFA 12:0 (Dodecanoic) (gm)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 8.22 Range of Values 1518 1518
. Missing 58 1576

DR1TS140 - SFA 14:0 (Tetradecanoic) (gm)

Variable Name:
DR1TS140
SAS Label:
SFA 14:0 (Tetradecanoic) (gm)
English Text:
SFA 14:0 (Tetradecanoic) (gm)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.008 to 11.344 Range of Values 1518 1518
. Missing 58 1576

DR1TS160 - SFA 16:0 (Hexadecanoic) (gm)

Variable Name:
DR1TS160
SAS Label:
SFA 16:0 (Hexadecanoic) (gm)
English Text:
SFA 16:0 (Hexadecanoic) (gm)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.361 to 48.622 Range of Values 1518 1518
. Missing 58 1576

DR1TS180 - SFA 18:0 (Octadecanoic) (gm)

Variable Name:
DR1TS180
SAS Label:
SFA 18:0 (Octadecanoic) (gm)
English Text:
SFA 18:0 (Octadecanoic) (gm)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.085 to 29.455 Range of Values 1518 1518
. Missing 58 1576

DR1TM161 - MFA 16:1 (Hexadecenoic) (gm)

Variable Name:
DR1TM161
SAS Label:
MFA 16:1 (Hexadecenoic) (gm)
English Text:
MFA 16:1 (Hexadecenoic) (gm)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.025 to 4.122 Range of Values 1518 1518
. Missing 58 1576

DR1TM181 - MFA 18:1 (Octadecenoic) (gm)

Variable Name:
DR1TM181
SAS Label:
MFA 18:1 (Octadecenoic) (gm)
English Text:
MFA 18:1 (Octadecenoic) (gm)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.607 to 84.893 Range of Values 1518 1518
. Missing 58 1576

DR1TM201 - MFA 20:1 (Eicosenoic) (gm)

Variable Name:
DR1TM201
SAS Label:
MFA 20:1 (Eicosenoic) (gm)
English Text:
MFA 20:1 (Eicosenoic) (gm)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 3.825 Range of Values 1518 1518
. Missing 58 1576

DR1TM221 - MFA 22:1 (Docosenoic) (gm)

Variable Name:
DR1TM221
SAS Label:
MFA 22:1 (Docosenoic) (gm)
English Text:
MFA 22:1 (Docosenoic) (gm)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 0.807 Range of Values 1518 1518
. Missing 58 1576

DR1TP182 - PFA 18:2 (Octadecadienoic) (gm)

Variable Name:
DR1TP182
SAS Label:
PFA 18:2 (Octadecadienoic) (gm)
English Text:
PFA 18:2 (Octadecadienoic) (gm)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.349 to 65.569 Range of Values 1518 1518
. Missing 58 1576

DR1TP183 - PFA 18:3 (Octadecatrienoic) (gm)

Variable Name:
DR1TP183
SAS Label:
PFA 18:3 (Octadecatrienoic) (gm)
English Text:
PFA 18:3 (Octadecatrienoic) (gm)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0.019 to 8.031 Range of Values 1518 1518
. Missing 58 1576

DR1TP184 - PFA 18:4 (Octadecatetraenoic) (gm)

Variable Name:
DR1TP184
SAS Label:
PFA 18:4 (Octadecatetraenoic) (gm)
English Text:
PFA 18:4 (Octadecatetraenoic) (gm)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 0.423 Range of Values 1518 1518
. Missing 58 1576

DR1TP204 - PFA 20:4 (Eicosatetraenoic) (gm)

Variable Name:
DR1TP204
SAS Label:
PFA 20:4 (Eicosatetraenoic) (gm)
English Text:
PFA 20:4 (Eicosatetraenoic) (gm)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 0.701 Range of Values 1518 1518
. Missing 58 1576

DR1TP205 - PFA 20:5 (Eicosapentaenoic) (gm)

Variable Name:
DR1TP205
SAS Label:
PFA 20:5 (Eicosapentaenoic) (gm)
English Text:
PFA 20:5 (Eicosapentaenoic) (gm)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 0.634 Range of Values 1518 1518
. Missing 58 1576

DR1TP225 - PFA 22:5 (Docosapentaenoic) (gm)

Variable Name:
DR1TP225
SAS Label:
PFA 22:5 (Docosapentaenoic) (gm)
English Text:
PFA 22:5 (Docosapentaenoic) (gm)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 0.227 Range of Values 1518 1518
. Missing 58 1576

DR1TP226 - PFA 22:6 (Docosahexaenoic) (gm)

Variable Name:
DR1TP226
SAS Label:
PFA 22:6 (Docosahexaenoic) (gm)
English Text:
PFA 22:6 (Docosahexaenoic) (gm)
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 0.984 Range of Values 1518 1518
. Missing 58 1576

DR1_300 - Compare food consumed yesterday to usual

Variable Name:
DR1_300
SAS Label:
Compare food consumed yesterday to usual
English Text:
Was the amount of food that {you/NAME} ate yesterday much more than usual, usual, or much less than usual?
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Much more than usual 138 138
2 Usual 1179 1317
3 Much less than usual 204 1521
7 Refused 2 1523
9 Don't know 7 1530
. Missing 46 1576

DR1_320Z - Total plain water drank yesterday (gm)

Variable Name:
DR1_320Z
SAS Label:
Total plain water drank yesterday (gm)
English Text:
Total plain water drank yesterday - including plain tap water, water from a drinking fountain, water from a water cooler, bottled water, and spring water.
English Instructions:
Calculated from water consumption records reported as part of the 24-hour dietary recall interview.
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 8591.25 Range of Values 1518 1518
. Missing 58 1576

DR1_330Z - Total tap water drank yesterday (gm)

Variable Name:
DR1_330Z
SAS Label:
Total tap water drank yesterday (gm)
English Text:
Total tap water drank yesterday - including filtered tap water and water from a drinking fountain.
English Instructions:
Calculated from tap water consumption records reported as part of the 24-hour dietary recall interview.
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 8591.25 Range of Values 1518 1518
. Missing 58 1576

DR1BWATZ - Total bottled water drank yesterday (gm)

Variable Name:
DR1BWATZ
SAS Label:
Total bottled water drank yesterday (gm)
English Text:
Total bottled water drank yesterday (gm)
English Instructions:
Calculated from bottle water consumption records reported as part of the 24-hour dietary recall interview.
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 to 6038.4 Range of Values 1518 1518
. Missing 58 1576

DR1TWS - Tap water source

Variable Name:
DR1TWS
SAS Label:
Tap water source
English Text:
When you drink tap water, what is the main source of the tap water? Is the city water supply (community water supply); a well or rain cistern; a spring; or something else?
Target:
Both males and females 3 YEARS - 15 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Community supply 932 932
2 Well or rain cistern 217 1149
3 Spring 49 1198
4 Don't drink tap water 242 1440
91 Other 1 1441
99 Don't know 89 1530
. Missing 46 1576

Appendix 1. Variables in the Individual Foods File (Y_DR1IFF) by Position

Day1 Name Variable Label
SEQN Respondent sequence number
WTDRD1 Dietary day one sample weight
DR1ILINE Food/Individual component number
DR1DRSTZ Dietary recall status
DR1EXMER Interviewer ID code
DR1DBIH # of days b/w intake and HH interview
DR1DAY Intake day of the week
DR1LANG Language respondent used mostly
DR1CCMNM Combination food number
DR1CCMTX Combination food type
DR1_020 Time of eating occasion (HH:MM)
DR1_030Z Name of eating occasion
DR1FS Source of food
DR1_040Z Did you eat this meal at home?
DR1IFDCD USDA food code
DR1MC Modification code
DR1IGRMS Grams
DR1IKCAL Energy (kcal)
DR1IPROT Protein (gm)
DR1ICARB Carbohydrate (gm)
DR1ISUGR Total sugars (gm)
DR1IFIBE Dietary fiber (gm)
DR1ITFAT Total fat (gm)
DR1ISFAT Total saturated fatty acids (gm)
DR1IMFAT Total monounsaturated fatty acids (gm)
DR1IPFAT Total polyunsaturated fatty acids (gm)
DR1ICHOL Cholesterol (mg)
DR1IATOC Vitamin E as alpha-tocopherol (mg)
DR1IATOA Added alpha-tocopherol (Vitamin E) (mg)
DR1IRET Retinol (mcg)
DR1IVARA Vitamin A, RAE (mcg)
DR1IACAR Alpha-carotene (mcg)
DR1IBCAR Beta-carotene (mcg)
DR1ICRYP Beta-cryptoxanthin (mcg)
DR1ILYCO Lycopene (mcg)
DR1ILZ Lutein + zeaxanthin (mcg)
DR1IVB1 Thiamin (Vitamin B1) (mg)
DR1IVB2 Riboflavin (Vitamin B2) (mg)
DR1INIAC Niacin (mg)
DR1IVB6 Vitamin B6 (mg)
DR1IFOLA Total folate (mcg)
DR1IFA Folic acid (mcg)
DR1IFF Food folate (mcg)
DR1IFDFE Folate, DFE (mcg)
DR1ICHL Total choline (mg)
DR1IVB12 Vitamin B12 (mcg)
DR1IB12A Added vitamin B12 (mcg)
DR1IVC Vitamin C (mg)
DR1IVD Vitamin D (D2 + D3) (mcg)
DR1IVK Vitamin K (mcg)
DR1ICALC Calcium (mg)
DR1IPHOS Phosphorus (mg)
DR1IMAGN Magnesium (mg)
DR1IIRON Iron (mg)
DR1IZINC Zinc (mg)
DR1ICOPP Copper (mg)
DR1ISODI Sodium (mg)
DR1IPOTA Potassium (mg)
DR1ISELE Selenium (mcg)
DR1ICAFF Caffeine (mg)
DR1ITHEO Theobromine (mg)
DR1IALCO Alcohol (gm)
DR1IMOIS Moisture (gm)
DR1IS040 SFA 4:0 (Butanoic) (gm)
DR1IS060 SFA 6:0 (Hexanoic) (gm)
DR1IS080 SFA 8:0 (Octanoic) (gm)
DR1IS100 SFA 10:0 (Decanoic) (gm)
DR1IS120 SFA 12:0 (Dodecanoic) (gm)
DR1IS140 SFA 14:0 (Tetradecanoic) (gm)
DR1IS160 SFA 16:0 (Hexadecanoic) (gm)
DR1IS180 SFA 18:0 (Octadecanoic) (gm)
DR1IM161 MFA 16:1 (Hexadecenoic) (gm)
DR1IM181 MFA 18:1 (Octadecenoic) (gm)
DR1IM201 MFA 20:1 (Eicosenoic) (gm)
DR1IM221 MFA 22:1 (Docosenoic) (gm)
DR1IP182 PFA 18:2 (Octadecadienoic) (gm)
DR1IP183 PFA 18:3 (Octadecatrienoic) (gm)
DR1IP184 PFA 18:4 (Octadecatetraenoic) (gm)
DR1IP204 PFA 20:4 (Eicosatetraenoic) (gm)
DR1IP205 PFA 20:5 (Eicosapentaenoic) (gm)
DR1IP225 PFA 22:5 (Docosapentaenoic) (gm)
DR1IP226 PFA 22:6 (Docosahexaenoic) (gm)

Appendix 2. List of Nutrients/Food Components (Unit)

Energy and Macronutrients

Food energy (kcal)
Protein (gm)
Carbohydrate (gm)
Fat, total (gm)
Alcohol (gm)

Sugars, total (gm)
Dietary fiber, total (gm)
Water (moisture) (gm)*

Saturated fatty acids, total (gm)
Monounsaturated fatty acids, total (gm)
Polyunsaturated fatty acids, total (gm)
Cholesterol (mg)

Individual fatty acids:
    4:0 (gm)
    6:0 (gm)
    8:0 (gm)
    10:0 (gm)
    12:0 (gm)
    14:0 (gm)
    16:0 (gm)
    18:0 (gm)
    16:1 (gm)
    18:1 (gm)
    20:1 (gm)
    22:1 (gm)
    18:2 (gm)
    18:3 (gm)
    18:4 (gm)
    20:4 (gm)
    20:5 n-3 (gm)
    22:5 n-3 (gm)
    22:6 n-3 (gm)

Vitamins, Minerals, and Other Components

Vitamin A as retinol activity equivalents (mcg)
Retinol (mcg)
Carotenoids:
    Carotene, alpha (mcg)
    Carotene, beta (mcg)
    Cryptoxanthin, beta (mcg)
    Lycopene (mcg)
    Lutein + zeaxanthin (mcg)
Vitamin E as alpha-tocopherol (mg)
    Added vitamin E as alpha-tocopherol (mg)
Vitamin D (D2 + D3) (mcg)
Vitamin K as phylloquinone (mcg)
Vitamin C (mg)
Thiamin (mg)
Riboflavin (mg)
Niacin (mg)
Vitamin B-6 (mg)
Folate, total (mcg)
    Folate as dietary folate equivalents (mcg)
    Folic acid (mcg)
    Food folate (mcg)
Choline, total (mg)
Vitamin B-12 (mcg)
    Added vitamin B-12 (mcg)

Calcium (mg)
Iron (mg)
Magnesium (mg)
Phosphorus (mg)
Potassium (mg)
Sodium (mg)
Zinc (mg)
Copper (mg)
Selenium (mcg)
Caffeine (mg)
Theobromine (mg)
__________________________________________________________________________

  * Value reflects moisture present in all foods, beverages, and water consumed as a beverage (variables DR1IMOIS, DR1TMOIS)

 

Appendix 3. Adding Food Code Descriptions or Modification Code Descriptions to Your Files

Two supporting files are also included with the Individual Foods file: the Food Code Description file (DRXFCD_G) and the Modification Code Description file (DRXMCD_G).

The DRXFCD_G file includes abbreviated descriptions (up to 80 characters) and complete descriptions (up to 200 characters) associated with each USDA food code identified in the Individual Foods file. The DRXMCD_G file includes descriptions (up to 200 characters) associated with each modification code identified in the Individual Foods file. Modification codes represent adjustments to predefined recipe ingredients that reflect more closely the food as described by the respondent.

The Food Code Description file (DRXFCD_G) contains three variables:

DRXFDCD a numeric value corresponding to DR1IFDCD in the Y_DR1IFF file;

DRXFCSD a short description (up to 80 characters) of the food code;

DRXFDLD a long description (up to 200 characters) of the food code.

The Modification Code Description file (DRXMCD_G) contains two variables:

DRXMC a numeric value corresponding to DR1MC in the Y_DR1IFF file;

DRXMCD a description (up to 200 characters) of the modification code.

The following SQL code is an example of appending the modifications code description (here called DR1MCD) to one of the Individual Foods file. This code is for SAS® Proc SQL. Other SQL implementations may be different. This same technique may be used for the Food Code Description file as well.

        proc sql; 
          create table Y_DR1IFF_PLUS as 
          select a.*, b.DRXMCD as DR1MCD 
          from nnyfs.Y_DR1IFF a 
          left join 
          NHANES.DRXMCD_G b 
          on a.DR1MC = b.DRXMC 
          order by SEQN, DR1ILINE; 
        quit;

SAS® users may wish to use Proc Format to assign labels to the food codes or to the modification codes. The following example assigns a permanent format to the food code based on the short description. It is assumed that the user has stored the Individual Foods files and the Food Code Description file in a library called NNYFS and wishes to store the formats there as well.

       options fmtsearch = (NHANES);

       data DRXFMT; 
         set NHANES.DRXFCD_G; 
         retain FMTNAME 'DRIFDCD'; 
         rename DRDIFDCD = start; 
         rename DRXFCSD  = value; 
         drop DRXFCLD; 
       run;

       proc format cntlin = DRXFMT 
         library = NHANES; 
       run;

       proc datasets lib = NHANES; 
         modify DR1IFFC; 
         format DR1IFDCD DRDIFDCD.; 
       quit;

__________________________________________________________________________

  SAS® is a registered trademark of SAS Institute, Inc.

 

Appendix 4. Variables in the Total Nutrient Intakes File (Y_DR1TOT) by Position

Day1 Name Variable Label
SEQN Respondent sequence number
WTDRD1 Dietary day one sample weight
DR1DRSTZ Dietary recall status
DR1EXMER Interviewer ID code
DR1DBIH # of days b/w intake and HH interview
DR1DAY Intake day of the week
DR1LANG Language respondent used mostly
DR1MNRSP Main respondent for this interview
DR1HELPD Helped in responding for this interview
DBQ095Z Type of table salt used
DBD100 How often add salt to food at table
DRQSPREP Salt used in preparation?
DR1STY Salt used at table yesterday?
DR1SKY Kind of table salt used yesterday
DRQSDIET On special diet?
DRQSDT1 Weight loss/Low calorie diet
DRQSDT2 Low fat/Low cholesterol diet
DRQSDT3 Low salt/Low sodium diet
DRQSDT4 Sugar free/Low sugar diet
DRQSDT5 Low fiber diet
DRQSDT6 High fiber diet
DRQSDT7 Diabetic diet
DRQSDT8 Weight gain/Muscle building diet
DRQSDT9 Low carbohydrate diet
DRQSDT10 High protein diet
DRQSDT11 Gluten-free/Celiac diet
DRQSDT12 Renal/Kidney diet
DRQSDT91 Other special diet
DR1TNUMF Number of foods reported
DR1TKCAL Energy (kcal)
DR1TPROT Protein (gm)
DR1TCARB Carbohydrate (gm)
DR1TSUGR Total sugars (gm)
DR1TFIBE Dietary fiber (gm)
DR1TTFAT Total fat (gm)
DR1TSFAT Total saturated fatty acids (gm)
DR1TMFAT Total monounsaturated fatty acids (gm)
DR1TPFAT Total polyunsaturated fatty acids (gm)
DR1TCHOL Cholesterol (mg)
DR1TATOC Vitamin E as alpha-tocopherol (mg)
DR1TATOA Added alpha-tocopherol (Vitamin E) (mg)
DR1TRET Retinol (mcg)
DR1TVARA Vitamin A, RAE (mcg)
DR1TACAR Alpha-carotene (mcg)
DR1TBCAR Beta-carotene (mcg)
DR1TCRYP Beta-cryptoxanthin (mcg)
DR1TLYCO Lycopene (mcg)
DR1TLZ Lutein + zeaxanthin (mcg)
DR1TVB1 Thiamin (Vitamin B1) (mg)
DR1TVB2 Riboflavin (Vitamin B2) (mg)
DR1TNIAC Niacin (mg)
DR1TVB6 Vitamin B6 (mg)
DR1TFOLA Total folate (mcg)
DR1TFA Folic acid (mcg)
DR1TFF Food folate (mcg)
DR1TFDFE Folate, DFE (mcg)
DR1TCHL Total choline (mg)
DR1TVB12 Vitamin B12 (mcg)
DR1TB12A Added vitamin B12 (mcg)
DR1TVC Vitamin C (mg)
DR1TVD Vitamin D (D2 + D3) (mcg)
DR1TVK Vitamin K (mcg)
DR1TCALC Calcium (mg)
DR1TPHOS Phosphorus (mg)
DR1TMAGN Magnesium (mg)
DR1TIRON Iron (mg)
DR1TZINC Zinc (mg)
DR1TCOPP Copper (mg)
DR1TSODI Sodium (mg)
DR1TPOTA Potassium (mg)
DR1TSELE Selenium (mcg)
DR1TCAFF Caffeine (mg)
DR1TTHEO Theobromine (mg)
DR1TALCO Alcohol (gm)
DR1TMOIS Moisture (gm)
DR1TS040 SFA 4:0 (Butanoic) (gm)
DR1TS060 SFA 6:0 (Hexanoic) (gm)
DR1TS080 SFA 8:0 (Octanoic) (gm)
DR1TS100 SFA 10:0 (Decanoic) (gm)
DR1TS120 SFA 12:0 (Dodecanoic) (gm)
DR1TS140 SFA 14:0 (Tetradecanoic) (gm)
DR1TS160 SFA 16:0 (Hexadecanoic) (gm)
DR1TS180 SFA 18:0 (Octadecanoic) (gm)
DR1TM161 MFA 16:1 (Hexadecenoic) (gm)
DR1TM181 MFA 18:1 (Octadecenoic) (gm)
DR1TM201 MFA 20:1 (Eicosenoic) (gm)
DR1TM221 MFA 22:1 (Docosenoic) (gm)
DR1TP182 PFA 18:2 (Octadecadienoic) (gm)
DR1TP183 PFA 18:3 (Octadecatrienoic) (gm)
DR1TP184 PFA 18:4 (Octadecatetraenoic) (gm)
DR1TP204 PFA 20:4 (Eicosatetraenoic) (gm)
DR1TP205 PFA 20:5 (Eicosapentaenoic) (gm)
DR1TP225 PFA 22:5 (Docosapentaenoic) (gm)
DR1TP226 PFA 22:6 (Docosahexaenoic) (gm)
DR1_300 Compare food consumed yesterday to usual
DR1_320Z Total plain water drank yesterday (gm)
DR1_330Z Total tap water drank yesterday (gm)
DR1BWATZ Total bottled water drank yesterday (gm)
DR1TWS Tap water source