Table 2.
Lung-function parameters according to smoking status.
| NS (n = 90) | p NS vs. FS | FS (n = 38) | p FS vs. CS | CS (n = 48) | p NS vs. CS | p-Value Anova | |
|---|---|---|---|---|---|---|---|
| FVC (L) | 3.9 ± 1.1 | 0.896 | 4.0 ± 1.0 | 0.347 | 3.7 ± 1.3 | 0.308 | 0.540 |
| FVC (% predicted) | 109 ± 19 | 0.024 | 100 ± 22 | 0.935 | 100 ± 22 | 0.022 | 0.010 |
| FEV1 (L) | 2.9 ± 0.9 | 0.270 | 2.7 ± 0.8 | 0.418 | 2.5 ± 1.1 | 0.042 | 0.150 |
| FEV1 (% predicted) | 93 ± 21 | 0.011 | 83 ± 18 | 0.473 | 79 ± 25 | 0.001 | 0.001 |
| FEV1/FVC (%) | 73 ± 10 | 0.012 | 68 ± 10 | 0.449 | 66 ± 12 | <0.001 | 0.002 |
| TLC (L) | 5.5 ± 1.8 | 0.751 | 5.6 ± 1.6 | 0.833 | 5.7 ± 1.6 | 0.911 | 0.890 |
| TLC (% predicted) | 104 ± 25 | 0.522 | 101 ± 19 | 0.361 | 105 ± 21 | 0.813 | 0.690 |
| RV (% predicted) | 118 ± 40 | 0.595 | 114 ± 28 | 0.683 | 117 ± 31 | 0.850 | 0.840 |
| DLCO (%) | 95 ± 16 | 0.153 | 91 ± 14 | 0.075 | 86 ± 10 | 0.002 | 0.002 |
| KCO (%) | 101 ± 15 | 0.987 | 100 ± 17 | 0.618 | 99 ± 12 | 0.533 | 0.790 |
NS: never-smokers; FS: former-smokers; CS: current-smokers; FVC: forced vital capacity; L: liter; FEV1: forced expiratory volume in one second; FEV1/FVC: ratio of forced expiratory volume in one second and forced vital capacity; TLC: total lung capacity; RV: residual volume; DLCO: diffusion lung capacity for carbon monoxide; KCO: ratio of DLCO and alveolar volume. Data is shown as mean ± standard deviation (SD). Bold characters show the significant differences (p value < 0.05).