TABLE 1.
Demography of asthma and non-asthma groups (Study 1).
| Variable | Study (asthma) group (n = 131,937) | Control (non-asthma) group (n = 131,937) | SMD |
| Sex | 0.01 | ||
| Female | 60,464 | 60,972 | |
| Male | 71,473 | 70,965 | |
| Age, years | 6.25 (4.43) | 6.40 (4.52) | 0.06 |
| 0–5 | 65,587 | 65,057 | |
| 6–10 | 42,074 | 39,711 | |
| 11–17 | 24,276 | 27,169 | |
| Economic status | 12.47 (5.62) | 12.40 (5.53) | 0.05 |
| <20% | 16,537 | 15,850 | |
| 20–80% | 76,657 | 79,740 | |
| >80% | 38,743 | 36,347 | |
| Region | 0.06 | ||
| Rural | 42,755 | 39,017 | |
| Metro | 89,182 | 92,920 | |
| Atopic dermatitis | 0.10 | ||
| Yes | 29,198 | 23,834 | |
| No | 102,739 | 108,103 | |
| Allergic rhinitis | 0.03 | ||
| Yes | 5,955 | 5,201 | |
| No | 125,982 | 126,736 | |
| CCI | 0.43 (0.56) | 0.38 (0.54) | 0.09 |
| 0 | 78,764 | 83,901 | |
| 1 | 50,389 | 46,109 | |
| 2 | 2,784 | 1,927 |
SMD, standardized mean difference and CCI, Charlson comorbidity index.