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Abstract:
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The National Death Index (NDI) is a file of identifying death record information for all U.S. deaths occurring since 1979. This computer-matching service assists health researchers in determining whether specific study subjects have died, and, if so, provides researchers with the states and dates of death and death certificate numbers. The NDI Plus service also provides the cause of death codes derived from the decedents' death certificates. Since 1982, the NDI has performed more than 3,800 searches involving more than 46 million records submitted by researchers involved in a variety of activities---including clinical trials, post-marketing drug surveillance, occupational health studies, cancer, and other disease registries---and longitudinal studies involving large population groups.
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