Author(s): Kim MH, Lin J, Hussein M, Battleman D
Background: Atrial fibrillation (AF) is prevalent and has a high cost burden. Among the main drivers of cost is inpatient care; however, little is known about patterns of hospital readmissions for AF.
Objective: To evaluate the incidence and temporal pattern of readmission in AF patients.
Methods: This retrospective, cohort analysis used claims data from the Integrated Healthcare Information Systems National Managed Care Benchmark Database for 2002–2006. Patients hospitalized for AF (primary discharge diagnosis) were identified. Data on the first readmission for AF over 1 year following an index hospitalization were analyzed for chronic AF (any AF-related claims in 1 year before index hospitalization) and newly-diagnosed AF patients (no prior AF-related claims).
Results: Overall, 4174 patients hospitalized with primary AF were identified; 1637 had chronic AF and 2537 newly-diagnosed AF. Mean age of chronic AF patients was 62.4 years and 61.2% were male; for newly-diagnosed AF, mean age was 61.4 years and 57.8% were male. In the year following index hospitalization, 12.5% of chronic AF patients were readmitted for AF, with a mean time to readmission of 142.5 days (median 108 days). Among newly-diagnosed AF patients, 10.1% were readmitted for AF, with a mean time to readmission of 133.8 days (median 112 days). For chronic AF, 17.6%, 43.4%, and 65.8% of readmissions occurred within 1, 3, and 6 months, respectively, versus 22.7%, 44.5%, and 67.2%, respectively, for newly-diagnosed AF.
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