Table 1.
Characteristics of patients with acute myocardial infarction who were identified in the Regional Administrative Database of Umbria.
Table 2.
Characteristics of patients with atrial fibrillation and flutter who were identified in the Regional Administrative Database of Umbria.
Table 3.
Characteristics of patients with heart failure who were identified in the Regional Administrative Database of Umbria.
Table 4.
Cross tabulation of the index test (ICD-9-CM code) for the results of the reference standard (medical chart).
Table 5.
Reasons for incorrect identification of cases and controls.