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National Health and Nutrition Examination Survey

NHANES is a survey research program conducted by National Centers for Health Statistics (NCHS), designed to assess health and nutritional status of adults and children in the United States. The survey integrates interviews and physical examinations. The interviews include demographics, socioeconomic, dietary and health-related questions, physical examinations including medical, dental, physiological measurements and laboratory tests. NHANES can be used for epidemiological studies and health sciences research, which can help develop public health policies, programs and services.

NHANES offers a rich variety of health and clinical data. It gives national results that can be compared to local findings. NHANES can be used to develop data-driven hypotheses as well as provide data that can be used for writing grants.

Note for Data Users
  • The sample weights are not computed automatically in the database and may be calculated differently for specific research questions. Please consult BQHS for further information on how to derive sample weights.
  • The variable names may be different across time, and recoded or derived variables may be added in different data cycles. Please check the variable lists for details.
  • Please select the variables based on the needs of the study as much as possible due to the limited downloadable file size.
RELATED TOPICS:
  1. Subsample Notes and Data
  2. Continuous NHANES Tutorials
  3. NHANES Sample Weights Tutorials
  4. NHANES Dietary Tutorial
  5. Survey Methods and Analytic Guidelines
  6. Other Special Topics
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