Canadian Adalimumab Post-Marketing Observational Epidemiological Study Effectiveness in Psoriatic Arthritis (COMPLETE-PsA): 12-Month Results of Comparative Effectiveness of Adalimumab and nbDMARDs

Objective COMPLETE-PsA was an observational study of biologic-naïve Canadian adults with active psoriatic arthritis (PsA) treated with adalimumab or a non-biologic disease-modifying antirheumatic drug (nbDMARDs) regimen, after inadequate response/intolerance to a current nbDMARD treatment regimen. The aim of this analysis was to assess 12-month effectiveness of adalimumab versus nbDMARDs. Methods Patients enrolled between March 2012 and November 2017 were included. The following clinical parameters and patient-reported outcomes were collected/calculated per routine care: DAPSA28, DAS28, ESR, CRP, MDGA, PtGA, pain, HAQ-DI, SF-12, enthesitis, dactylitis, BSA, and time to achieving ACR50, ACR70 and modified MDA (mMDA). Results Two hundred seventy-seven adalimumab-treated and 148 nbDMARD-treated patients were included. At baseline, adalimumab-treated patients were less likely to be employed; had longer morning stiffness; higher DAPSA28, DAS28, MDGA, PtGA, pain, and HAQ-DI; and lower prevalence of dactylitis (all p<0.05). Adalimumab-treated patients showed lower baseline-adjusted DAPSA28 (16.5 vs. 26.6), DAS28 (2.8 vs. 3.9), MDGA (25.3 vs. 37.1), and ESR (10.2 vs. 15.4 mm/hr) after 3 months compared to nbDMARD-treated patients, with observed improvements maintained to month 12. Time to achievement of ACR50, ACR70, and mMDA was significantly (p<0.01) shorter among adalimumab-treated patients, with the likelihood of having dactylitis [OR: 0.4 (0.2–0.6)] and BSA<3% [2.7 (1.5–5.0)] significantly lower and higher, respectively. Switching to another biologic was less likely in adalimumab-treated vs. nbDMARD -treated patients (HR [95% CI]: 0.3 [0.2-0.5]). Conclusion In a real-world Canadian PsA population, adalimumab was more effective than nbDMARDs at reducing disease activity and the severity of skin involvement and demonstrated higher retention.