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Table 2 Univariate (Spearman (rho)) correlations between inflammatory biomarkers

From: Biomarkers of systemic inflammation and depression and fatigue in moderate clinically stable COPD

  TNF-α CRP TNF R1 TNF R2
TNF-α 1    
CRP 0.11 1   
TNF-α R1 0.368** 0.285** 1  
TNF-α R2 0.282** 0.104 .548** 1
IL-6 0.114 0.449** .391** .199*
  1. ** Correlation is significant at the 0.01 level (2-tailed).
  2. * Correlation is significant at the 0.05 level (2-tailed).
  3. CRP = C-reactive protein; IL-6 = Interleukin-6; TNF-α = Tumor necrosis factor-α; TNF-α R1 = Tumor necrosis factor-α receptor1; TNF-α R2 = Tumor necrosis factor-α receptor2