2018 Volume 128 Issue 13 Pages 2835-2841
Between 2015 and 2017, the Japanese Society for Psoriasis Research conducted a retrospective questionnaire survey of Japanese patients with psoriatic arthritis. The results revealed several characteristics; i) there was a male predominance, ii) the mean age of onset of cutaneous psoriasis was in the late thirties, while that of arthritis was in the late forties, iii) plaque-type psoriasis occupied >90%, iv) polyarthritis or distal interphalangeal type was the most common arthritis type, v) family history of psoriasis was observed in 5-7%, vi) enthesitis was observed >20%, and vii) dactylitis was observed around 60%. Biologics were used in nearly 50% of the psoriatic arthritis patients, and switching to other biologics or discontinuance was seen in 15%. This paper shows the current status of psoriatic arthritis in Japan.
