Study of Efficacy, Safety and Effect on Radiographic Progression of Brodalumab in Subjects With Psoriatic Arthritis

The primary objective of this study is to evaluate the efficacy of brodalumab, compared to placebo, in subjects with psoriatic arthritis. The key secondary objective is to evaluate the efficacy of brodalumab compared to placebo at week 16 and week 24. The safety objective of this study is to evaluate the safety profile of brodalumab in subjects with psoriatic arthritis.