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Table 2 Clinical characteristics of subjects

From: Human epididymis protein 4 aggravates airway inflammation and remodeling in chronic obstructive pulmonary disease

  Non-smokers (n = 12) Smokers (n = 15) COPD (n = 51)
Age (years) 59.00 (53.00–67.50) 61.00 (58.00–67.00) 66.00 (57.00–69.00)
Men, n (%) 11 (91.67) 14 (93.33) 50 (98.04)
BMI (kg/m2) 23.02 (21.09–24.69) 23.00 (20.69–24.80) 22.36 (19.38–23.95)
Smoking (pack-years) 0 39.00 (32.00–47.00)* 45.00 (39.00–60.00)*
FEV1 (% predicted) 93.00 (89.25–109.50) 88.00 (84.00–93.00) 44.00 (37.00–54.00)*#
FEV1/FVC (%) 80.75 (77.11–82.30) 74.30 (72.40–78.25) 47.04 (38.84–60.00)*#
  1. Data are expressed as median (IQR) or n (%), *P < 0.05 vs Non-smokers, #P < 0.05 vs Smokers