Table 1 Demographic and clinical characteristics
Demographic characteristics | Control (n = 520) | COPD (n = 535) | P value |
|---|---|---|---|
Sex, %male (n) | 55.19 (287) | 87.85 (470) | P < 0.01 |
Age, M (IQR) | 63 (41–85) | 67 (45–86) | P < 0.01 |
BMI, mean (SD) | 24.13 ± 3.29 | 22.10 ± 3.32 | P = 0.01 |
Smoking, % (n) | 20.96 (109) | 78.50 (420) | P < 0.01 |
Cough, % (n) | 13.46 (70) | 77.94 (417) | P < 0.01 |
Sputum, % (n) | 8.46 (44) | 51.40 (275) | P < 0.01 |
Dyspnea, % (n) | 2.31 (12) | 50.47 (270) | P < 0.01 |
C02 retention, % (n) | 0.96 (5) | 14.21 (76) | P < 0.01 |
Respiratory failure, % (n) | (0) | 7.85 (42) | P < 0.01 |
FEV1% predicted, mean (SD) | 92.33 ± 17.69 | 55.02 ± 19.82 | P < 0.01 |
FEV1/FVC | 85.17 ± 7.17 | 57.24 ± 11.31 | P < 0.01 |
GOLD stage, % (n) | Â | Â | Â |
1 | NA | 18.50 (99) | NA |
2 | NA | 42.06 (225) | NA |
3 | NA | 25.61 (137) | NA |
4 | NA | 13.83 (74) | NA |