The results showed that MLR (OR = 2.355, p = 0.039), PLR (OR = 5.775, p = 0.005), SIRI (OR = 2.423, p = 0.044) and CRP (OR = 3.251, p = 0.008) were associated with a higher probability of diagnosis with psoriatic arthritis by univariate analysis (Table 3). This evidence concerns the gene CRP and psoriatic arthritis.