Key Concepts About Finding Survey Background Information

The NHANES survey content is determined after a rigorous evaluation process including consideration of criteria such as public health importance, feasibility of the proposed survey items and burden to survey participants. This information is important as you determine the scope of your analysis and which variables to include. For example, your analysis may require background information, such as:

• Survey Contents, which shows the years components were collected and when changes to the components occurred,
• Sample Person Questionnaire, and
• MEC Components Description, which is the survey protocol for obtaining the physical examination measures in the survey.