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Related Experiment Videos

Assessing record linkage between health care and Vital Statistics databases using deterministic methods.

Bing Li1, Hude Quan, Andrew Fong

  • 1Department of Community Health Sciences, University of Calgary, Calgary, Alberta, T2N 4N1, Canada. LIB@UCALGARY.CA

BMC Health Services Research
|April 7, 2006
PubMed
Summary
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Deterministic record linkage using surname, sex, and date of birth is optimal for Canadian databases. This combination balances high linkage and correct linkage rates for population and health registries.

Area of Science:

  • Health Informatics
  • Data Linkage
  • Biostatistics

Background:

  • Assessing linkage and correct linkage rates is crucial for utilizing Canadian administrative databases.
  • Deterministic record linkage was employed across population registry, hospital discharge data, and Vital Statistics registry.

Purpose of the Study:

  • To determine the optimal combination of personal identifiers for deterministic record linkage.
  • To evaluate linkage and correct linkage rates across different Canadian databases.

Main Methods:

  • Three combinations of four personal identifiers (surname, first name, sex, date of birth) were tested.
  • A unique personal health number was used to assess the correct linkage rate.

Main Results:

Related Experiment Videos

  • The combination of surname, sex, and date of birth yielded the highest linkage rates (88.0%-93.1%) and strong correct linkage rates (96.9%-98.9%).
  • Adding first name marginally improved correct linkage (<1%) but significantly decreased overall linkage rates (~10%).
  • Linkage and correct linkage rates varied by age and database type, but not by sex.

Conclusions:

  • Surname, sex, and date of birth represent an optimal identifier set for deterministic record linkage in this context.
  • The findings highlight the importance of identifier selection for maximizing data linkage efficiency and accuracy.
  • Variations in linkage performance underscore the need to consider database characteristics and age demographics.