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| Asthmatics | Controls | |
| Characteristic | (N = 235) | (N = 1,075) |
| Gender | ||
| Boy | 128 (54.5) | 522(48.6) |
| Girl | 107 (45.5) | 553(51.4) |
| Age, yr | 12.7±1.0 | 12.8±0.4 |
| BMI | 20.8±4.3 | 20.4±4.1 |
| Pulmonary function indices | ||
| FVC (% predicted) | 99.9±13.3 | 100.1±13.9 |
| FEV1 (% predicted) | 97.6±14.1 | 99.9±21.9 |
| MMEF (% predicted) | 93.7±24.5 | 99.7±22.5 |
| FEV1/FVC (%) | 88.8±6.2 | 90.9±5.4 |
Values were presented by n (%) or mean ± SD.
