Abstract
Purpose: Describe treatment patterns by disease severity among biologic-treated psoriasis patients.Materials and methods: We selected our study cohort in the IQVIA PharMetrics Plus adjudicated claims database linked to Electronic Health Record data from Modernizing Medicine Data Services. Patients were classified as having mild, moderate, or severe psoriasis based on a hierarchy of available severity measures. Patients were followed for 360 days to assess combination therapy, therapy switching and restarting, adherence and persistence.Results: The cohort comprised 2130 biologic-treated patients (mean age: 47.6 years; 45.4% female); 447 (21%) had available disease severity measures. Compared to patients with mild (N = 282) psoriasis, more patients with moderate (N = 116) or severe (N = 49) disease used combination therapy (21.3% vs. 34.5% and 32.7%, respectively), switched therapies (12.1% vs. 19.8% and 22.4%), and discontinued biologics (18.4% vs. 27.6% and 36.7%). Mean adherence was <75% by Medication Possession Ratio (MPR) (73.9%) and Proportion of Days Covered (PDC) (70.2%). Overall, 52.2% had a mean MPR >80%. Mean persistence to biologics was 297.6 days. Persistence and adherence decreased with increasing disease severity.Conclusions: Biologic-treated psoriasis patients had inadequate adherence (i.e., MPR <80%) and modest persistence to biologics, with moderate and severe patients demonstrating lower adherence and persistence than mild patients.
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