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Evaluating Health Outcomes of Criminal Justice Populations Using Record Linkage: The Importance of Aliases

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  • Sarah Larney

    (Centre for Health Research in Criminal Justice, Justice Health, New South Wales, Australia, National Drug and Alcohol Research Centre, University of New South Wales, Kensington, Australia, sarah.larney@justicehealth.nsw.gov.au)

  • Lucy Burns

    (National Drug and Alcohol Research Centre, University of New South Wales, Kensington, Australia)

Abstract

Individuals in contact with the criminal justice system are a key population of concern to public health. Record linkage studies can be useful for studying health outcomes for this group, but the use of aliases complicates the process of linking records across databases. This study was undertaken to determine the impact of aliases on sensitivity and specificity of record linkage and how this affects ascertainment of mortality. Records for a cohort of prisoners were linked to methadone maintenance treatment (MMT) and mortality records. The record linkage was conducted in two stages. First, the linkage was undertaken using the participant’s name and date of birth as recorded in a prior study. Then, a second linkage was undertaken using these identifiers, plus all known aliases. Sensitivity was 64%, and specificity 100%, for the first linkage. When aliases were added to the linkage, sensitivity increased to 86% and specificity remained 100%. The standardized mortality ratio was 4.3 for the first linkage, increasing to 6.1 when aliases were used. These results suggest that the potential effects of participant aliases on linkage outcomes, and methods for mitigating these effects should be carefully considered when planning and undertaking record linkage studies with criminal justice populations.

Suggested Citation

  • Sarah Larney & Lucy Burns, 2011. "Evaluating Health Outcomes of Criminal Justice Populations Using Record Linkage: The Importance of Aliases," Evaluation Review, , vol. 35(2), pages 118-128, April.
  • Handle: RePEc:sae:evarev:v:35:y:2011:i:2:p:118-128
    DOI: 10.1177/0193841X11401695
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    References listed on IDEAS

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    1. Rosen, D.L. & Schoenbach, V.J. & Wohl, D.A., 2008. "All-cause and cause-specific mortality among men released from state prison, 1980-2005," American Journal of Public Health, American Public Health Association, vol. 98(12), pages 2278-2284.
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