VIFs for all attributes originally included in this analysis (i.e., age, gender, geographic region, PsA disease duration, PASI score, enthesitis, dactylitis, TJC 68, SJC 66, CRP, and HAQ-DI) were ≤2.75; therefore, multicollinearity is not likely a concern (generally, a VIF >4 suggests multicollinearity). The gene discussed is CRP; the disease is enthesitis.