Abstract

Opioid use among individuals with spondyloarthritis is common; however, data on whether these individuals have higher utilization of the healthcare system are lacking. We examined the association between opioid use and healthcare utilization and costs among patients with psoriatic arthritis (PsA) and ankylosing spondylitis (AS). We included adults with PsA or AS enrolled in the FORWARD registry, with ≥ 1 completed disease activity or disability questionnaire between 2010 and 2019. The exposure was patient-reported opioid use, and the outcomes were annualized healthcare utilization and prescription costs. We used negative binomial regression to assess the association between opioid use and the utilization outcomes, and generalized linear models with γ-distribution and log link function for the association between opioid use and costs. Models were adjusted for age, sex, and hospitalization. AS and PsA were studied separately. Among 828 patients with PsA, 21.4% used opioids; for those with AS, 27.2% of 334 patients reported opioid use. Opioid users had higher healthcare utilization and costs, including increased medical visits, diagnostic tests, direct medical costs, and pharmacy expenses. Opioid users had 32-33% more medical visits annually vs nonusers. Patients using opioids spent more on medical visits annually compared to nonusers (US $3464 vs $2706 for PsA; US $4500 vs $3660 for AS). Compared to patients not using opioids, patients with PsA and AS who used opioids had higher healthcare utilization and higher health-related costs. New care pathways are needed to improve care and reduce costs.

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