Disease and Economic Burden Associated with Recurrent Pericarditis in a Privately Insured United States Population

INTRODUCTION: Approximately 30% of patients with a first acute pericarditis episode experience a recurrence ≤ 18 months; ~ 15% experience multiple recurrences. This study assessed the recurrence and economic burden among patients with multiple recurrences. METHODS: Adults with idiopathic pericarditis were identified in the OptumHealth Care Solutions, Inc., database (2007–2017). Recurrent pericarditis (RP) was defined as ≥ 2 episodes of care separated by > 28 days; multiple recurrences were defined as ≥ 2 recurrences. RESULTS: Among 944 patients with RP, 375 (39.7%) experienced multiple recurrences and were propensity score-matched 1:1 to 375 patients without recurrence. Among patients with multiple recurrences, median disease duration (time from first episode to end of last recurrence, confirmed by a 1.5-year recurrence-free period) was 2.84 years. The multiple recurrences cohort had higher rates of hospitalizations per-patient-per-month (PPPM) than the no recurrence cohort (rate ratio [95% confidence interval (CI)] = 2.22 [1.35–3.65]). Mean total healthcare costs were significantly higher in the multiple recurrences versus no recurrence cohort ($2728 vs. $1568 PPPM, cost ratio [95% CI] = 1.74 [1.29–2.32]), mainly driven by higher hospitalization costs in the multiple recurrences cohort (mean: $1180 vs. $420 PPPM, cost ratio [95% CI] = 2.81 [1.80–4.66]). Mean work loss costs were higher in the multiple recurrences versus no recurrence cohort ($696 vs. $169 PPPM, cost ratio [95% CI] = 4.12 [1.64–9.61]). In patients with multiple recurrences, mean cost of the first episode was $19,189; subsequent recurrences ranged from $2089 to $7366 (second recurrence = $6222). CONCLUSION: In conclusion, among patients with multiple pericarditis recurrences, disease symptoms persisted several years, and healthcare and work loss costs were further compounded in this subset of patients. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s12325-021-01868-7.