TABLE 1.
NHANES data: sections and key information
| Component | Information |
|---|---|
| Demographic1 | Age, sex, income, race-ethnicity, family, health insurance, housing characteristics |
| Questionnaires | Diet, behavior, and nutrition2Early childhood1Food security3Consumer behavior1Medical conditions1 |
| Dietary4,5 | Individual food files–day 1 and day 2 (since 2002)Total nutrient intakes–day 1 and day 2 (since 2002)Nutrient supplements intake–30 d and 24 h (since 2007) |
| Examination4 | Body measuresWeight, recumbent length/height (>0 mo)Head circumference (0–6 mo)Midupper arm circumference (≥2 mo) |
| Laboratory4 | Analyses vary by survey year |
1
Collected through interviews administered in the home.
2
Questions relevant to infants and toddlers 0–24-mo old were collected through interviews administered in the home.
3
Household food security questions were administered in the home and answered by the household reference person.
4
Day 1 dietary recall, examination, and laboratory components were carried out at the mobile examination center.
5
Day 2 dietary recall was administered over the telephone.