The National Health and Nutrition Examination Survey (NHANES) is a program of studies designed to assess the health and nutritional status of adults and children in the United States. The survey is unique in that it combines interviews and physical examinations.
Selected Participants
Have you been selected to take part in the National Health and Nutrition Examination Survey?
Information for Health Professionals
Learn about participant involvement and benefits with the National Health and Nutrition Examination Survey
What's New
Announcements
- Guidelines for Proposals to Use Samples and Proposed Cost Schedule [PDF - 76 KB]
- Survey Contents for 1999-2010 is now available [PDF - 1.4 MB]
Publications
- Prevalence of Underweight Among Adults: United States, 2003-2006 (7/2009)
- Prevalence of Underweight Among Children and Adolescents: United States, 2003-2006 (7/2009)
New Data Releases
Updated Data Releases
Advisory for Vitamin D Data
There are two issues that should be addressed when analyzing serum 25-hydroxyvitamin D (25(OH)D) data from NHANES. First, users are cautioned about making direct comparisons between serum 25-hydroxyvitamin D measurements from NHANES 2000-2006 and measurements obtained in NHANES III (1988-1994). Second, data users should also be aware that the 25(OH)D data from the 2000-2006 NHANES were most likely affected by drifts in the assay performance over time.
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50th Anniversary
Contact Us:
- National Center for Health Statistics
3311 Toledo Rd
Hyattsville, MD 20782 - 1 (800) 232-4636
- cdcinfo@cdc.gov
