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NHANES I Epidemiological Follow-up Study (NHEFS) Linked Mortality File

NHANES I Epidemiological Follow-up Study (NHEFS) Linked Mortality File 2025

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The document provides detailed information on the NHANES I Epidemiological Follow-up Study (NHEFS) Linked Mortality File, focusing on the coding of underlying and multiple causes of death using ICD-9 and ICD-10 classifications for deaths occurring between 1971 and 2006. It outlines the structure of mortality data, including recodes for various causes of death, coding guidelines, and methodologies used to categorize conditions listed on death certificates. The document serves as a resource for researchers conducting mortality analyses.

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How to obtain NHANES data?

Go to cdc.gov. Select NCHS Select NHANES Select Survey Data and Documentation

How is mortality data collected?

Final data are based on processing all 2 million death records filed annually in the United States. The more timely provisional mortality data are based in part on a systematic sample of death certificates. Final mortality information is processed principally in state vital statistics offices.

What type of data does NHANES collect?

NHANES collects data on the prevalence of chronic and infectious diseases and conditions (including undiagnosed conditions) and on risk factors such as obesity, elevated serum cholesterol levels, hypertension, diet and nutritional status, and a number of other measures.

Does NHANES collect mortality data?

NHANES is linked with mortality data to enable the opportunity of prospective analysis. The public-use file includes a limited set of mortality variables; the restricted-use file includes more detailed mortality information.

What is NHANES data used for?

NHANES is designed to assess the health and nutritional status of adults and children in the United States. The survey is unique because it combines interviews and health examinations.

Do epidemiologists use data from NHANES to determine?

8 Restricted Data. The NHANES restricts data on geography (Census 2010 Block ID), genetics (e.g. BRCA1 associated protein), and the exact dates of participants interviews and examinations. To used these data, researchers must apply for access through the National Center for Health Statistics Research Data Centers.

What do epidemiologists use data from NHANES to determine?

Epidemiologists use data from NHANES to determine: the prevalence of major diseases.

NHANES I Epidemiological Follow-up Study (NHEFS) Linked Mortality File 2025

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