Outcome measures used in psoriatic arthritis registries and cohorts: A systematic literature review of 27 registries or 16,183 patients

Psoriatic arthritis (PsA) is a multidimensional inflammatory disease for which multiple outcome measures can be used to assess disease activity. In 2006, the OMERACT has proposed the first core domain set in PsA. Since 2006, much work has been performed on outcome measures in PsA.The purpose of this study was to assess outcome measures collected in recent PsA registries or longitudinal cohorts.A systematic literature review was performed in...