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Table 2 The codes used to include eligible individuals in the cohort

From: Does the association between adherence to statin medications and mortality depend on measurement approach? A retrospective cohort study

Individual Selection Diagnoses from Hospital Services Database
ICD-9a ICD-10-CA Description
410 I21–I22.xxx myocardial infarction (MI)
411 I20.0xx and I24.xxx unstable angina (UA)
  1. aICD-9 was used until March 31, 2001, when ICD-10-CA reporting started
  2. ICD-9: Manual of the International Statistical Classification of Diseases, Injuries, And Causes Of Death, 9th revision. Geneva: The Organization; 1977
  3. ICD-10-CA: International Statistical Classification of Diseases and Related Health Problems, tenth revision, Canada. Canadian Institute for Health Information; 2003