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Table 3 The characteristics of the patients providing sputum samples

From: Glutathione-S-transferases in lung and sputum specimens, effects of smoking and COPD severity

  Non-smoker
N = 3
Chronic bronchitis
N = 3
COPD
N = 6
p-value
Age, years 45 (21) 44 (16) 60 (7) 0.181
Sex M:F 3:0 3:0 4:2 0.301
Pack-years 0 29 (15) 48 (18) 0.005
FEV1 %predicted 113 (19) 101 (4) 61 (21) 0.021
FEV1/FVC % 88 (2) 80 (1) 64 (15) 0.115
MEF50 %pred 131 (47) 87 (12) 36 (20) 0.006
DCO %pred 92 (7) 95 (6) 63 (24) 0.053
DCO/VA %pred 100 (5) 99 (8) 75 (31) 0.266
  1. Mean (SD)