Criteria, frequency, and duration of clinical remission in psoriatic arthritis patients with peripheral involvement requiring second-line drugs.

This article outlines our case-control, prospective, 6-year followup study to evaluate the frequency of clinical remission and duration of remission episodes in patients with peripheral psoriatic arthritis (PsA). All case patients were consecutive new outpatients with peripheral PsA requiring second-line drugs. Controls were consecutive new outpatients with rheumatoid arthritis (RA).