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NCHS

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 Release
Data Release
Updated Data

Conversion units for cadmium, manganese and mercury were corrected to nmol/L.

 

2007-2014 Dermatology questionnaire data (DEQ) were updated to correct coding errors in variables DED120 (time spent outside on work or school days) and DED125 (time spent outside on days not at work or at school). New codes were added to specify participants who reported not spending any time outdoors (DED120 & DED125), not working or going to school (DED120), or at work or at school 9 to 5 seven days a week (DED125). These participants were originally coded as missing in previously released versions.

 

2013-2014 Vitamin B12 has been updated to included participants aged 19 years.

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