Table 3. Association of demographic, socioeconomic, clinical and genetic factors with asthma exacerbations in CHIRAH study.
| Factor | Odds ratio | 95% CI | d.f. | Chi-square | Unadjusted p-value |
| African ancestry | 1.03 | 0.28, 3.72 | 1 | 0.00 | 0.965 |
| Age | 0.98 | 0.96, 1.00 | 1 | 3.46 | 0.063 |
| Gender | 0.99 | 0.68, 1.43 | 1 | 0.01 | 0.943 |
| Follow-up time (months) | 0.99 | 0.97, 1.01 | 1 | 0.36 | 0.547 |
| Duration of asthma | 1.83 | 1.19, 2.82 | 1 | 6.10 | 0.014 |
| Corticosteroid usea | 1.14 | 0.83, 1.57 | 1 | 0.63 | 0.428 |
| Asthma severity | 1.53 | 1.13, 2.07 | 1 | 8.55 | 0.004 |
| Income | 0.84 | 0.55, 1.27 | 1 | 0.71 | 0.398 |
| Private insurance | 0.55 | 0.38, 0.80 | 1 | 7.58 | 0.006 |
| Tobacco exposure | 1.01 | 0.69, 1.46 | 1 | 0.00 | 0.971 |
| FEV1 b (% predicted) | 0.82 | 0.55, 1.24 | 2 | 0.90 | 0.639 |
a
Use at each time point of the model.
b
Basal forced expiratory volume in one second.