Figure 1
From: Validation of a computer case definition for sudden cardiac death in opioid users
Identification of potential sudden cardiac deaths subsequently adjudicated by medical record review. aCohort, includes 134,479 persons with propoxyphene prescriptions (last prescription during follow-up) and 319,357 with hydrocodone. bCounties were Benton, Cheatham, Coffee, Davidson, DeKalb, Dickson, Hickman, Marshall, Maury, Montgomery, Putnam, Robertson, Rutherford, Smith, Sumner, Warren, Williamson, and Wilson.