NCHS Data Linkage

2015 Public-Use Linked Mortality Files

Public-use Linked Mortality Files (LMF) are available for 1986-2014 NHIS, 1999-2014 NHANES, and NHANES III. The files 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 select records, synthetic data were substituted for follow-up time or underlying cause of death. Information regarding vital status was not perturbed.

The 2019 public-use Linked Mortality Files, which will include survey data from the 1986-2018 NHIS, 1999-2018 NHANES, and NHANES III with mortality data through 2019, are forthcoming. We anticipate a spring 2022 release of the files.

Data Files and Data Dictionaries

Comparability of 2015 Public-use and Restricted-use Files

Reports comparing the 2015 public-use and restricted-use NHIS and NHANES Linked Mortality Files are available here:

For more information about accessing the restricted-use linked mortality files, please consult the Restricted-Use Linked Mortality Data page.

Page last reviewed: September 1, 2021, 02:30 PM