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NCHS Mortality Linkage Program

The NCHS Mortality Linkage Program maximizes the scientific value of population-based surveys by linking health survey data with mortality information. This program allows researchers to examine the impact of various health factors on mortality rates while implementing strategies to protect respondent confidentiality. This documentation includes detailed file layouts, analytic guidelines, and methodologies to maintain statistical validity and privacy. For more information on linked mortality files and access to public use data, visit the NCHS website.

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NCHS Mortality Linkage Program

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  1. NCHS Mortality Linkage Program • Designed to maximize the scientific value of the NCHS population-based surveys • Enables researchers to examine the association of a variety of health factors with mortality, using the richness of NCHS health surveys

  2. Background: Linked Mortality Public-use Data Release • Risk of respondent re-identification prevented public-use release of linked mortality data files • Based upon BSC recommendation, conducted disclosure risk analyses • Developed data perturbation strategy to protect respondent identity, while maintaining statistical validity

  3. Summary NCHS Linked Mortality Data Files

  4. Supporting Documentation for Linked Mortality Data • File layouts • Matching methodology reports • Analytic guidelines • Comparative analysis of the public-use and restricted-use data • Guide to weighting and variance estimation (NHIS) • Sample input statements for SAS & STATA for Public-use Linked Mortality Files

  5. http://www.cdc.gov/nchs ACCESS OUR WEBPAGE FROM NCHS HOMEPAGE

  6. http://www.cdc.gov/nchs/r&d/nchs_datalinkage/data_linkage_activities.htmhttp://www.cdc.gov/nchs/r&d/nchs_datalinkage/data_linkage_activities.htm SELECT MORTALITY BY TOPIC AREA AND SEE LIST OF ALL SURVEYS LINKED TO MORTALITY OR SELECT DATA BY SPECIFIC NCHS SURVEY FROM THE SURVEY SPECIFIC PAGE, ANALYSTS CAN DOWNLOAD THE PUBLIC DATA OR GET INFORMATION REGARDING THE RESTRICTED FILES

  7. Background: Linked Mortality Public-use Data Release • Problem/Issue • Risk of respondent disclosure prevented a public-use release of previously highly utilized mortality linked data files • BSC recommendation to study ways to release public-use linked mortality files • Solution • Conducted disclosure risk analyses to determine extent of NCHS respondent re-identification risk • Developed perturbation strategy to ensure protection of respondent identity, while maintaining statistical validity • Cleared by NCHS Disclosure Review Board

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