Real-world treatment patterns and healthcare costs in patients with psoriasis taking systemic oral or biologic therapies.

BACKGROUND: Psoriasis is a chronic, immune-mediated, systemic inflammatory disorder associated with high costs. This study evaluated real-world treatment patterns and associated costs in patients in the United States with psoriasis initiating systemic oral or biologic treatments.

METHODS: This retrospective cohort study used IBM® (now Merative™) MarketScan® Commercial and Medicare claims (January 1, 2006-December 31, 2019) to evaluate patterns of switching, discontinuation, and nonswitching in two cohorts of patients initiating oral or biologic systemic therapy. Total pre-switch and post-switch costs were reported per-patient per-month (PPPM).

RESULTS: Each cohort was analyzed (oral, n = 11,993; biologic; n = 9753). Among the oral and biologic cohorts, 32% and 15% discontinued index and any systemic treatment within 1 year of initiation; 40% and 62% remained on index therapy; and 28% and 23% switched treatment, respectively. In the oral and biologic cohorts, total PPPM costs within 1 year of initiation for nonswitchers, discontinuers, and switchers were $2594, $1402, and $3956, respectively, and $5035, $3112, and $5833, respectively.

CONCLUSION: This study identified lower persistence in the oral treatment cohort, higher costs associated with switching, and a need for safe and effective oral options for patients with psoriasis to delay the switch to biologic therapy.