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National Health and Nutrition Examination Survey

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

NHANES National Youth Fitness Survey

The NHANES National Youth Fitness Survey (NNYFS) was a one year survey conducted in 2012. The NNYFS collected nationally representative data on physical activity and fitness levels of children and adolescents in the United States through interviews and fitness tests. On September 30, 2013, the first wave of this data was released. To review documentation and download datasets, go to the NNYFS Data and Documentation page.

What's New

Publications
Data Release – 2015-2016
Data Release – Other Cycles
Data Release – Limited Access
Updated Data
  • Occupation (OCQ_G 2011-2012)
    Industry and occupation group code variables have been added for study participant’s current and longest held jobs.
  • Volatile Organic Compounds & Metabolites – Urine – Special Sample (Subsample) (UVOCS_G 2011-2012)
    The 2011-2012 Volatile Organic Compounds (VOC) and Metabolites in urine (UVOC_G and UVOCS_G) datasets have been updated to include a Special Analytic Note on bias adjustments applied to several VOC in urine metabolite analytes listed in the Analytic Notes section of the documentation files.
  • Volatile Organic Compounds & Metabolites – Urine (Surplus) (Subsample) (SSUVOC_D 2005-2006)
    The 2005-2006 Volatile Organic Compounds (VOC) and Metabolites in urine (SSUVOC_G ) (Surplus) dataset was withdrawn from the NHANES website in January 2016. These datasets are now corrected and republished on the NHANES website for immediate use. For details on adjustments applied to the dataset, see the Analytic Notes section of the documentation file.

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