Table 1.
Clinical characteristics of the patients with chronic obstructive pulmonary disease
| Mild (stage I) (n = 13) | Moderate (stage II) (n = 13) | P | |
|---|---|---|---|
| Age (years) | 71.2 ± 8.3 | 70.4 ± 8.5 | 0.80 |
| Height (m) | 1.636 ± 0.091 | 1.680 ± 0.061 | 0.18 |
| Weight (kg) | 61.1 ± 9.8 | 63.9 ± 14.1 | 0.56 |
| BMI (kg/m2) | 22.80 ± 3.03 | 22.49 ± 3.91 | 0.82 |
| VC (L) | 3.539 ± 0.861 | 3.550 ± 0.689 | 0.97 |
| VC (% pred) | 113.3 ± 15.8 | 106.1 ± 15.9 | 0.25 |
| FEV1 (L) | 2.158 ± 0.521 | 1.699 ± 0.297 | 0.01* |
| FEV1 (% pred) | 97.8 ± 15.6 | 69.4 ± 8.7 | <0.01* |
| FEV1/FVC (%) | 61.8 ± 4.7 | 49.6 ± 11.1 | <0.01* |
Note: Data are expressed as the mean ± standard deviation.
*
P < 0.05.
Comparisons between the two groups were performed using Student’s t-test.
Abbreviations: BMI, body mass index; FEV1, forced expiratory volume in 1 second; FVC, forced vital capacity; VC, vital capacity.