Study design: GO-VIBRANT was a global, multicenter, randomized, double-blind, placebo-controlled study evaluating the efficacy and safety of SIMPONI ARIA® compared with placebo in 480 adult patients with active PsA. The target study population was biologic-naïve patients with active PsA for ≥6 months who met ClASsification criteria for Psoriatic ARthritis (CASPAR) criteria at screening. Patients in this trial had a diagnosis of PsA for at least 6 months and had symptoms of active disease (≥5 swollen joints and ≥5 tender joints and a CRP level of ≥0.6 mg/dL). At Week 0, patients were randomized in a 1:1 ratio to 1 of 2 treatment groups. Patients were allowed to be treated with or without MTX. Patients in the placebo group (n=239) were randomized to receive IV placebo infusions at Weeks 0, 4, 12, and 20. Patients in the SIMPONI ARIA® group (n=241) were randomized to receive SIMPONI ARIA®2 mg/kg infusions at Weeks 0, 4, and q8w thereafter through Week 52. Patients were to receive a placebo infusion at Week 24 to maintain the treatment blind. At Week 24, all patients switched to treatment with SIMPONI ARIA®2 mg/kg and were to receive administrations at Weeks 24, 28, and q8w through Week 52. The primary endpoint was the percentage of patients achieving an ACR20 response at Week 14.