The NDI is a central, computerized index of death record information compiled under contract to the NCHS by the State vital statistics programs. Magnetic tapes (beginning with deaths occurring in 1979) contain a standard set of identifying data for each decedent. The data are used to search the NDI to identify and locate death records filed in the State offices. NDI assists researchers to determine if persons in their studies may have died. If so, the NDI provides the names of the States where the deaths occurred, the corresponding death certificate numbers, and the death dates. The NDI user can them arrange with the appropriate State vital statistics office to obtain copies of death certificates or specific statistical information such as cause of death.
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