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Table 1 Demographic characteristics

From: CD4+CD25highCD127- regulatory T-cells in COPD: smoke and drugs effect

  Never-smoker healthy volunteers Current smoker healthy volunteers Former smokers COPD patients Current smoker COPD patients
n 10 10 14 14
Age (years) 61.4 57.8 72.5 §§,*** 69.9 §,**
Sex (F/M) 6/4 1/9 1/13 3/11
FEV1 (%predicted) 102.6 ± 8.45 94.6 ± 11.9 61.71 ± 8.2 §§, ** 57.21 ± 7.3 §§,**
  1. COPD chronic obstructive pulmonary disease; FEV 1 forced expiratory volume in the 1st second
  2. Data are presented as mean ± SD
  3. § = p < 0.05 vs never-smoker healthy volunteers
  4. §§ = p < 0.01 vs never-smoker healthy volunteers
  5. ** = p < 0.01 vs current smoker healthy volunteers
  6. *** = p < 0.001 vs current smoker healthy volunteers