Table 2

 Inflammatory markers in patients with normal and raised CRP levels and in healthy controls

COPDControls
Normal CRPRaised CRP
Values presented as median (range).
TNF-α, tumour necrosis factor α; sTNF-R55/75, soluble TNF-receptor 55/75; IL-6, interleukin 6.
*p<0.05 v healthy controls.
†p<0.03 v normal CRP levels.
TNFα (pg/ml)1.25 (0.60–3.42)1.31 (0.43–3.19)1.23 (0.74–2.70)
sTNF-R55 (ng/ml)0.87 (0.54–2.51)1.00 (0.59–2.20)†0.88 (0.59–1.46)
sTNF-R75 (ng/ml)1.42 (0.81–3.39)1.54 (0.84–3.33)*1.14 (0.68–1.82)
IL-6 (pg/ml)2.60 (1.00–11.45)*6.45 (0.90–12.85)*†1.76 (0.81–6.00)