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Table 2 Correlations between synovial fluid biomarker levels and biological disease activity indexes at baseline in 14 knees

From: Synovial effusion and synovial fluid biomarkers in psoriatic arthritis to assess intraarticular tumor necrosis factor-α blockade in the knee joint

Spearman's rank correlation coefficients
  CRP ESR
IL-1β 0.61* 0.57*
IL-1Ra 0.57* 0.54*
IL-6 0.69** ns
IL-8 ns 0.54*
MIP1-α ns 0.67**
TNF-α ns ns
IL-17 ns ns
IL-22 ns ns
  1. Significance by Sperman's rank test: * P < 0.05; ** P < 0.01; ns, not significant.