Data Files and Data Dictionaries
2011 Public-use Linked Mortality Files
Public-use Linked Mortality Files are available for 1985-2009 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.
- Public-use 2011 Linked Mortality File Readme [PDF - 89 KB]
Corrected 2011 Public-use Linked Mortality Files were released on April 28, 2015. On March 25, 2015, there was a problem identified with the public-use files and the earlier versions of the files were removed from the website. Although the errors affected only a small number of records, the corrected files should be used for analysis. The errors did not affect the restricted-use files available through the Research Data Center. We apologize for the inconvenience. Please contact email@example.com if you have questions.
- Public-use 2011 Linked Mortality File Data Dictionary [PDF - 122 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.
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.