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The PPVs of acute myocardial infarction, ischemic stroke, and hemorrhagic stroke were low only by diagnosis (81.6% [95% CI 72.5-88.7]; 31.0% [95% CI 22.8-40.3]; and 45.5% [95% CI 34.1-57.2], respectively); however, the PPVs were elevated after adding the prescription and procedure data (87.0% [95% CI 78.3-93.1]; 44.4% [95% CI 32.7-56.6]; and 46.1% [95% CI 34.5-57.9], respectively). When we added event-specific prescription and procedure data to the algorithms, the PPVs for each event increased to 70%-98%, with apparent sen