DeKalb County is one of 15 counties selected for the National Health and Nutrition Examination Survey (NHANES). Residents will have an invitation-only opportunity to participate in NHANES. Individuals have been selected at random (in a process similar to taking names out of a hat) for NHANES. They include all ages, races, and ethnicities to represent the U.S. population as a whole. Respondents first participate in a health interview conducted in the respondent’s home followed by a health examination that takes place in one of three mobile examination centers.