General characteristics of the study population (n=430) of 50–67 years old men with a mean age of 60 years. Mean and range are presented
| Non-smokers n=96 | Exsmokers n=180 | Smokers n=154 | ||||
|---|---|---|---|---|---|---|
| Mean | Range | Mean | Range | Mean | Range | |
| Height (cm) | 175 | 159–191 | 176 | 159–192 | 174 | 158–192 |
| Weight (kg) | 79 | 59–115 | 79 | 49–115 | 75 | 55–101 |
| Pack-years | 0 | – | 16,1 | 0,2–51 | 27,2 | 3–61 |
| VC (%pred) | 95 | 67–129 | 91 | 46–131 | 88 | 60–131 |
| FEV1 (%pred) | 95 | 55–122 | 89 | 32–121 | 83 | 26–109 |
| FEV1/VC | 0,75 | 0,58–0,86 | 0,72 | 0,35–0,86 | 0,7 | 0,31–0,89 |
| Phase III (%pred.)* | 92 | −30–274 | 136 | 19–744 | 182 | 36–614 |
Predicted normal values for VC and FEV1 are calculated according to Hedenström et al21 and for the slope of phase III according to Sixt et al.23
*Phase III=slope of phase III of the single-breath nitrogen (N2) test.
FEV1, forced expiratory volume in 1 s; VC, vital capacities.