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Table 1 Demographic characteristics of the subjects

From: The role of uPAR in epithelial-mesenchymal transition in small airway epithelium of patients with chronic obstructive pulmonary disease

  Non-smokers(NC) n = 25 Smokers (NS) n = 25 Non-smokers with COPD (CN) n = 10 Smokers with COPD (CS) n = 18
Sex (female/male) 20/5 1/24 9/1 0/18
Age (years) 55 ± 9 56 ± 11 59 ± 7 61 ± 9
Smoking history, pack-years 26 ± 14 37 ± 25
FEV1,% predicted 97 ± 15 99 ± 11 65 ± 17 70 ± 16
FEV1/FVC% 84 ± 8 80 ± 7 56 ± 7 61 ± 5
GOLD stage     
1 1 1
2 7 12
3 2 5
4
  1. Values are given as mean ± SD.
  2. Pack-year = 1 year smoking 20 cigarettes per day.
  3. COPD, chronic obstructive pulmonary disease; FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity.