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Information of asthma patients and age‐matched controls
| Patients (n = 437) | Control (n = 451) | |
|---|---|---|
| Age (y) | 4.1 ± 3.16 | 4.62 ± 3.69 |
| Male | 216 | 227 |
| Female | 221 | 224 |
| Mild asthma | 239 | NA |
| Moderate asthma | 157 | NA |
| Severe asthma | 41 | NA |
| Population | ||
| Han | 428 | 436 |
| Others | 9 | 15 |
| Family history | ||
| Yes | 5 | 0 |
| No | 432 | 451 |
NA, Not available.
