Table 1.
Comparison of baseline characteristics between the chronic obstructive pulmonary disease patients with pulmonary infections and those without
|
Baseline characteristics
|
The control group
|
The pulmonary infection group
|
χ
2
|
P
value
|
| Cases, n | 96 | 85 | ||
| Gender (male/female) | 59/37 | 50/35 | 0.131 | 0.718 |
| Age range (yr) | 67.44 ± 8.51 | 68.83 ± 8.90 | 1.073 | 0.285 |
| Course of disease (yr) | 16.35 ± 7.68 | 17.13 ± 8.06 | 0.666 | 0.506 |
| Smoking history, n (%) | 68 (70.83) | 65 (76.47) | 0.735 | 0.391 |
| FEV1 (%) | 47.65 ± 10.07 | 41.30 ± 9.91 | 4.266 | < 0.001 |
| FEV1/FVC (%) | 58.24 ± 8.62 | 50.48 ± 9.13 | 5.879 | < 0.001 |
FEV1: Forced expiratory volume in the first second; FVC: Forced vital capacity.