| Low SES | High SES | |||||
| % | Mean | SD | % | Mean | SD | |
| Age (year) | 12.8 | 3.5 | 14.9 | 1.9 | ||
| Gender (% boys) | 63 | 85 | ||||
| Medications (% using each type) | ||||||
| Inhaled corticosteroid | 75 | 80 | ||||
| β agonist | 75 | 87 | ||||
| Atopic asthma (%) | 75 | 93 | ||||
| Asthma severity (1–4 scale) | 2.8 | 1.0 | 2.5 | 0.5 | ||
| FEV1% | 94.9 | 12.6 | 99.8 | 17.6 | ||
The groups did not differ significantly in terms of gender, medications, atopic asthma, asthma severity or FEV1% (p values >0.15). Children in the high SES group were older than children in the low SES group (p = 0.047).
FEV1, forced expiratory volume in 1 s; SES, socioeconomic status.