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Table 1 Smoking status, plasma sICAM-1 and IL-6 levels in COPD patients and in healthy subjects

From: PM2.5-induced oxidative stress increases intercellular adhesion molecule-1 expression in lung epithelial cells through the IL-6/AKT/STAT3/NF-κB-dependent pathway

Group I Age Gender Smoking status sICAM-1 (ng/ml) IL6 (ng/ml)
C1 82 M Ex-smoker 20 pack-years 67.73 5.29
C2 87 M Ex-smoker 35 pack-years 40.19 0.29
C3 73 M Ex-smoker 20 pack-years 62.95 1.11
C4 49 M Active smoker30 pack-years 78.08 0.11
C5 81 M Ex-smoker 15 pack-years 59.40 0.044
C6 88 F Ex-smoker 12 pack-years 84.41 3.34
C7 70 M Ex-smoker 38 pack-years 95.68 0.435
C8 74 M Active smoker 33 pack-years 79.19 0.012
Group II      
H1 67 M Never-smoker 43.81 0
H2 61 M Never-smoker 46.81 0
H3 68 M Never-smoker 40.84 0
H4 69 M Never-smoker 43.81 0
H5 82 M Never-smoker 42.84 0
H6 76 M Never-smoker 41.74 0
H7 65 F Never-smoker 45.33 0
H8 73 F Never-smoker 39.11 0