Effectiveness of Tofacitinib in Patients with Psoriatic Arthritis Initiating Monotherapy Versus Combination Therapy: Results from the CorEvitas Psoriatic Arthritis/Spondyloarthritis Registry.

INTRODUCTION

This study evaluated the real-world effectiveness of tofacitinib monotherapy versus combination therapy in patients with psoriatic arthritis (PsA) enrolled in the CorEvitas PsA/Spondyloarthritis Registry.

METHODS

This study (NCT05195814) included adult patients with PsA initiating tofacitinib (from December 14, 2017 to October 1, 2023) as monotherapy, or in combination with oral small molecules (OSMs: methotrexate, leflunomide, sulfasalazine, hydroxychloroquine, and apremilast). Patients with baseline and 6-month follow-up visits (± 3 months) were included.

OUTCOMES: mean change from baseline (∆) in/proportions achieving, disease activity measures (including body surface area [BSA] = 0%), and patient-reported outcomes. Continuous endpoints at month 6 were analyzed as ∆ with an analysis of covariance model including treatment and baseline value as covariates. ∆ in least squares (LS) means and adjusted LS means/odds ratios are presented.

RESULTS

The study included 141 patients (66/141 monotherapy; 75/141 combination therapy). Patients were predominantly female (61.0%) and white (94.3%), and average age was 56.7 years. More monotherapy initiators were OSM treatment-naïve and had higher mean Patient Global Assessment of Arthritis, compared with combination therapy initiators. By 6 ± 3 months, 28.8% and 25.3% of monotherapy and combination therapy initiators, respectively, discontinued tofacitinib. At 6 ± 3 months, 15.0% of monotherapy initiators achieved minimal disease activity, and 27.1% had BSA = 0%. Corresponding data for combination therapy initiators were 20.7%, and 22.0%, respectively. Differences between groups were not significant. LS mean differences from baseline in overall work impairment/activity impairment were - 13.0/- 21.8 and 1.4/- 2.9 for monotherapy and combination therapy initiators, respectively.

CONCLUSION

Monotherapy and combination therapy initiators demonstrated improvements across effectiveness outcomes. Tofacitinib monotherapy initiators experienced numerical improvements in overall work impairment/activity impairment. This highlights tofacitinib effectiveness as monotherapy/combination therapy for a diverse PsA population. However, the small sample size limited the statistical power, and so results should be interpreted cautiously.

TRIAL REGISTRATION: ClinicalTrials.gov identifier, NCT05195814.