Table 1:
Demographic information for nonsmokers, smokers, and subjects in the smokers group with COPD. Values are presented as mean ± standard deviations. RV= residual volume, TLC= Total lung capacity.
| Nonsmokers (n=15) | Smokers (n=33) | Smokers with COPD (n=12) | |
|---|---|---|---|
| Demographics | |||
| Age | 52.9 ± 5.9 | 49.9 ± 6.9 | 52.4 ± 8.2 |
| Height (in) | 67.8 ± 3.4 | 69.0 ±3.1 | 68.6 ± 3.5 |
| Weight (lb) | 174.6 ± 29.5 | 183.9 ± 34.9 | 181.65 ± 36.9 |
| Body mass index (kg/m^2) | 26.7 ± 4.2 | 27.2 ± 4.04 | 27.0 ± 5.3 |
| Smoking (Pack Years) | 0 ± 0 | 29.1 ± 10.3 | 38.1 ± 16.4 |
| PFTs | |||
| FVC(L) | 4.09 ± 0.96 | 4.17 ± 1.1 | 3.55 ± 1.0 |
| FEV1 (L) | 3.35 ± 0.78 | 3.20 ± 0.72 | 2.03 ± 0.62 |
| FEV1/FVC (%) | 81.7 ± 2.7 | 77.5 ± 4.5 | 57.3 ± 5.3 |
| RV/TLC (%) | 30.6 ± 4.5 | 31.1 ± 7.5 | 40.5 ± 8.1 |
| DLCO (mL/min/mm Hg) | 27.4 ± 5.1 | 25.3 ± 6.3 | 18.4 ± 5.3 |
| Percentage predicted FEV1 | 106.1 ± 11.1 | 98.1 ± 15.1 | 65.7 ± 12.5 |
| Percentage predicted FVC | 101.7 ± 9.2 | 101.4 ± 18.8 | 90.2 ± 14.5 |
| Percentage Predicted DLCO | 107.4 ± 12.5 | 98.2 ± 22.9 | 81.1 ± 21.9 |
| Clinical Tests | |||
| Distance walked in 6MWT (m) | 551.8 ± 120.8 | 485.1 ± 70.0 | 506.3 ± 72.6 |
| SGRQ Overall Score | 1.91 ± 2.7 | 11.8 ± 12.7 | 27.6 ± 22.10 |