Comparison of the relationships between interleukin-1β (IL-1β), interleukin-17 (IL-17), and tumor necrosis factor-α (TNF-α). (A) Pearson’s correlation analysis shows a significant correlation between serum levels of IL-1β and IL-17 (r=0.603, P=0.000). (B) Pearson’s correlation analysis shows a significant correlation between serum levels of IL-1β and TNF-α (r=0.560, P=0.000). (C) Pearson’s correlation analysis shows a significant correlation between serum levels of IL-17 and TNF-α (r=0.688, P=0.000). IL-1β – interleukin-1β; IL-17 – interleukin-17; TNF-α – tumor necrosis factor-α.