national health and nutrition examination survey: california and los angeles county, estimation methods and analytic considerations, 1999 2006, and 2007 2014 /

The National Health and Nutrition Examination Survey (NHANES),conducted by the National middle for Health Statistics (NCHS), is a cross-sectional survey of the civilian noninstitutionalized resident population of the United States. NHANES is unique in that t combines a personal interview with a health examination that includes a collection of biological specimens.

Source: cdc.gov