National Health and Nutrition Examination Survey

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
Updated Data

URXUCR was updated to correct the Limit of Detection, only six data points were affected.

2013-2014 Aldehyde – Serum datasets (ALD_H & ALDS_H) were updated to correct the Limits of Detection (LOD) for various analytes in the LOD table in both documentation files. However, only data for one analyte (LBXI5AL-Isopentanaldehyde)was updated, as the LOD was corrected from 0.119 ng/mL to 0.316 ng/mL.

Documentation and SAS labels for the following pooled-sample datasets were updated to reflect the correct units the analyte values were reported in. No changes were made to the actual values of any analytes in these datasets.

Page last reviewed: August 15, 2019