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2011 Public-use Linked Mortality Files

Public-use Linked Mortality Files are available for 1986-2009 NHIS, NHANES III, 1999-2010 NHANES, and LSOA II and include a limited set of mortality variables for adult participants only. The public-use versions of the NCHS Linked Mortality Files were subjected to data perturbation techniques to reduce the risk of participant re-identification. For selected decedent records, synthetic data were substituted for the actual date and underlying cause of death. Information regarding vital status was not perturbed.


Comparability of Public-use and Restricted-use Data Files [PDF - 136 KB]


2011 Restricted-use Linked Mortality Files

Includes detailed mortality information and mortality follow-up for children. Additional death certificate data are also available. The restricted-use versions of the Linked Mortality Files were not subjected to data perturbation techniques.

Data Availability

Due to confidentiality requirements, the Restricted-use Linked Mortality Files are accessible only through the NCHS Research Data Center (RDC). All interested researchers must submit a research proposal to the RDC. Please see the RDC web site for instructions on submitting a proposal (RDC website.) Researchers are not allowed to use Public-use and Restricted-use Linked Mortality Files, together, in the RDC.


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