Comparison of Medicare claims versus physician adjudication for identifying stroke outcomes in the Women's Health Initiative.

ABSTRACT:

Background and purpose

Many studies use medical record review for ascertaining outcomes. One large, longitudinal study, the Women's Health Initiative (WHI), ascertains strokes using participant self-report and subsequent physician review of medical records. This is resource-intensive. Herein, we assess whether Medicare data can reliably assess stroke events in the WHI.

Methods

Subjects were WHI participants with fee-for-service Medicare. Four stroke definitions were created for Medicare data using discharge diagnoses in hospitalization claims: definition 1, stroke codes in any position; definition 2, primary position stroke codes; and definitions 3 and 4, hemorrhagic and ischemic stroke codes, respectively. WHI data were randomly split into training (50%) and test sets. A co

SUBMITTER: Lakshminarayan K 

PROVIDER: S-EPMC4082657 | biostudies-literature | 2014 Mar

REPOSITORIES: biostudies-literature