Task 2: Key Concepts About NHANES Dietary Data Collection

 

NHANES Data Collection

NHANES collects data using interviews, physical examinations, and questionnaires:

• All participants complete an in-person household interview.
• Following the household interview, all survey participants are asked to complete a health examination.  Examinations are performed in a Mobile Examination Center (MEC).  The health examination component consists of clinical tests, laboratory studies, and additional interviews.  Some tests are only administered to select sub-samples.
• Following the health examination, participants may complete additional interviews and questionnaires.  The post-examination interviews and questionnaires are administered by telephone or mail.  Not all questionnaires are administered to all participants.

 

NHANES Dietary Data Collection

Three major types of dietary data are collected in NHANES: