Created variables
Public release variable(s)
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NDI_DECEASED_FLAG: Respondent deceased status, indicating NDI verification or lack thereof
Restricted-use Geocode variables
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NDI_UNDERLYING_CAUSE-113_CODE: NDI: Underlying cause of death from NDI death certificate
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NDI_YEAR_OF_DEATH: Year of death from NDI death certificate
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NDI_REGION_OF_DEATH: Region of death, computed using state of death from NDI death certificate
The Round 29 (2020) release includes data obtained from the National Death Index (NDI) for deceased respondents whose death certificates could be successfully matched. Each respondent's records were individually reviewed to confirm matches between NLSY79 respondents and the death certificate data retrieved from the NDI search. For further details on NDI data, refer to NLSY79 Attachment 8: Health Codes.
The NDI_DECEASED_FLAG created variable is included on the public release data. The other NDI created variables are part of the restricted-use Geocode data. These confidential files are available for use only at the BLS National Office in Washington, DC, and at Federal Statistical Research Data Centers (FSRDCs) on statistical research projects approved by BLS. Access to data is subject to the availability of space and resources. Information about applying to use the zip code and Census tract data is available on the BLS Restricted Data Access page.
| Comparison to Other NLS Surveys | NLSY97 round 20 contains the variable NDI_DECEASED_FLAG in the public release data and similar NDI data (e.g. cause, year, and region of death) in the restricted-use Geocode data. |
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| Survey Instruments and Documentation | NLSY79 Attachment 8 in the Codebook Supplement |
| Area of Interest | NDI Verification |