Table 1– Demographic data of the subjects studied
MaleFemaleTotal
Subjects123169292
Age years45.2±9.5 (28–65)47.3±10.6 (26–66)46.4±10.2 (26–66)
Height m1.74±0.06 (1.61–1.86)1.63±0.07 (1.46–1.74)1.69±0.08 (1.46–1.86)
Weight kg80.0±12.6 (43–110)70.6±13.8 (48–105)75.6±14.0 (43–110)
Spirometry
 FEV1 L4.06±0.70 (2.35–5.90)2.87±0.51 (1.71–4.50)3.37±0.84 (1.71–5.90)
 FEV1# % pred94±12 (62–127)94±12 (71–129)94±12 (62–129)
 FVC L5.28±0.82 (3.09–8.03)3.65±0.61 (2.15–5.39)4.34±1.07 (2.15–8.03)
 FVC# % pred99±11 (67–127)99±12 (72–145)99±12 (67–145)
 FEV1/FVC %77±678±678±6
 FEV1/FVC# % pred95±7 (71–113)95±6 (80–115)95±7 (71–115)
 MEF50 L·s−14.43±1.33 (1.40–8.11)3.37±0.98 (1.41–6.33)3.82±1.26 (1.40–8.11)
 MEF50# % pred82±24 (30–147)77±20 (39–137)79±22 (30–147)
Smoking
 Pack-years10.30±12.57 (0–47)7.21±10.18 (0–39)8.51±11.33 (0–47)
Smoking history
 Nonsmokers47 (38.2)74 (43.8)121 (41.4)
 Ex-smokers30 (24.4)45 (26.6)75 (25.7)
 Smokers46 (37.4)50 (29.6)96 (32.9)
ETS
 Ever84 (68.3)131 (77.5)215 (73.6)
 Both at work and at home49 (39.8)65 (38.5)114 (39.0)
Inhaled corticosteroids+3 (2.4)6 (3.6)9 (3.1)
  • Data are presented as n, mean±sd (range) or n (%). Predicted values according to Viljanen et al. [16]. FEV1: forced expiratory volume in 1 s; % pred: % predicted; FVC: forced vital capacity; MEF50: maximal expiratory flow at 50% of FVC; ETS: environmental tobacco smoke. #: lung function values, n = 291; : at work and/or at home; +: daily use of inhaled corticosteroids ≥200 μg.