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Table 2 Correlation coefficients for univariate relationships between plasma inflammatory markers at baseline (year 0) and first follow-up visit (year 1), and FFMI and FMI at those two visits

From: TNF-α is associated with loss of lean body mass only in already cachectic COPD patients

  CRP,year 0 CRP, year 1 TNF-α year 0 TNFα year 1 IL-1ß, year 0 IL-1ß, year 1 IL-6, year 0 IL-6, year 1 FFMI, year 0 FFMI, year 1 FMI, year 0 FMI, year 1
CRP, year 0 1            
CRP, year 1 0.75** 1           
TNF-α year 0 −0.05 −0.10 1          
TNF-α year 1 −0.02 −0.02 0.49** 1         
IL-1ß, year 0 0.10 0.06 0.30** 0.20** 1        
IL-1ß, year 1 0.05 0.08 0.21** 0.17** 0.47** 1       
IL-6, year 0 0.17** 0.19** 0.27** 0.22** 0.24** 0.20** 1      
IL-6, year 1 0.11* 0.15** 0.17** 0.36** 0.08 0.15** 0.43** 1     
FFMI, year 0 0.18** 0.13* −0.05 0.06 0.03 −0.04 0.08 0.10 1    
FFMI, year 1 0.19** 0.15** −0.05 −0.01 0.08 0.00 0.10 0.03 0.95** 1   
FMI, year 0 0.27** 0.16** −0.04 0.06 0.05 −0.01 0.02 0.10* 0.25** 0.30** 1  
FMI, year 1 0.27** 0.15** −0.01 0.01 0.06 −0.02 0.01 0.03 0.26** 0.26** 0.93** 1
  1. * p < 0.05, ** p < 0.01; Spearman rank correlation coefficients.