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

Data Release

Aldehydes – Serum (ALD_H 2013-2014)
Aldehydes – Serum – Special Sample (ALDS_H 2013-2014)
Cotinine and Hydroxycotinine – Serum (COT_I 2015-2016)
Fluorosis – Clinical (FLXCLN_I 2015-2016)
Fluorosis – Clinical (FLXCLN_H 2013-2014)
Perfluoroalkyl and Polyfluoroalkyl Substances (SSPFSU_H 2013-2014)
Tobacco-specific Nitrosamines (TSNAs) – Urine (TSNA_H 2013-2014)

Data Release – Limited Access Data

Fluorosis – Clinical 20-29 Years (FLXC_H_R 2014)

Updated Data

2011-2012 Oral Health – Dentition File (OHXDEN_G) was updated to provide the 2011-2012 dental fluorosis clinical assessment data in a separate dataset (FCXCLN_G) to be consistent with the release of the 2013-2014 and 2015-2016 data. Variables for the 2011-2012 fluorosis data were renamed to reflect the new file name (i.e., prefix changed from OHX to FCX). There were no changes to any data values. There were no changes to any variables remaining in the 2011-2012 Oral Health – Dentition file.