Fig. 1

Timeline and classification of admissions. Circles represent admissions with CVD identified in a subsequent diagnosis; triangles represent admissions with CVD identified in the principal diagnosis. Index admissions were the first admissions that occurred in 2010. Incident admissions refer to admissions that index admissions coincided with the first-time admissions (first three lines). Recurrent admissions refer to admissions where the first-time admissions occurred before 2010 (last three lines)