Baseline and after-treatment changes were compared between patients with PsA 2 years versus PsA > 2 years in efficacy measures ( physician global assessment [ PGA ] arthritis , swollen joint count and Psoriasis Area and Severity Index [ PASI ] ) and patient reported outcomes ( PROs ; joint pain , arthritis activity , Euro-Qol [ EQ-5D ] utility and visual analogue score [ VAS ] ) using linear regression analysis .