Prédiction of PsA from PsO. Stockholm cohort, n=672): •PsA incidence 21.1/1000 PY. •AUC 0.80 for both referral and prognostic models. •Predictors: HLA-B27, uveitis, enthesial pain, TJC, hsCRP, BMI, SAA, GlycA. •Early identification feasible. Abstract OP0178 @RheumNow https://t.co/dxdChN6VZy