Study Evaluating the Cost of the Treatments of the Refractory Psoriatic Arthritis to the Conventional Therapy

The purpose of this study is to conduct an economic analysis on the cost of conventional therapy as compared to biologic therapy and the direct/indirect costs of disease management in patients with refractory psoriatic arthritis (PsA). Primary outcomes are to qualify the economic burden of refractory PsA care. The secondary outcomes are to assess efficacy, safety, and cost effectiveness of different therapies.