Table 1.
Demographic characteristics of the discovery dataset.
| Variable | Asthma | COPD | Control | Total | P-value |
|---|---|---|---|---|---|
| (N = 1391) | (N = 1091) | (N = 5346) | (N = 7828) | ||
| Age (yr) | 50.3 ± 15.4 | 66.6 ± 9.9 | 49.7 ± 10.4 | 52.2 ± 12.8 | < 0.001 |
| Female sex, n (%) | 769 (55.3) | 124 (11.4) | 2355 (44.1) | 3248 (41.5) | < 0.001 |
| Height (cm) | 162.9 ± 9.2 | 165.1 ± 8.4 | 166.4 ± 8.1 | 165.7 ± 8.4 | < 0.001 |
| BMI | 24.3 ± 3.6 | 23.2 ± 3.1 | 23.1 ± 3.1 | 23.3 ± 3.2 | < 0.001 |
| Pre-BD FEV1 pred (%) | 78.8 ± 19.9 | 66.0 ± 22.7 | 101.7 ± 12.2 | 92.9 ± 20.8 | < 0.001 |
| Pre-BD FEV1/FVC (%) | 70.7 ± 12.1 | 54.8 ± 12.5 | 81.6 ± 5.7 | 76.0 ± 12.6 | < 0.001 |
The mean ± SD values are shown for each cell. BMI, body mass index; FEV1, forced expiratory volume in 1 s; BD, bronchodilator; FVC, forced vital capacity. ANOVA and X2 tests were performed for quantitative and qualitative variables, respectively.