Univariate association between risk factors and asthma or hospitalisations due to asthma among children aged 5–9 years enrolled in Medicaid, Alaska, January 1999–December 2002
| Variable | Any asthma | Inpatient asthma among children with asthma | ||
|---|---|---|---|---|
| % | Prevalence ratio | % | Prevalence ratio | |
| Values are given as OR (95% CI). | ||||
| Anchorage residence | ||||
| Yes (n = 3928) | 5.9 | 1.8 (1.5 to 2.2) | 6.0 | 0.8 (0.4 to 1.5) |
| No (n = 8788) | 3.2 | Reference | 7.8 | Reference |
| Alaska Native status | ||||
| Yes (n = 6687) | 3.1 | 0.6 (0.5 to 0.7) | 7.6 | 1.2 (0.6 to 2.2) |
| No (n = 6029) | 5.0 | Reference | 6.6 | Reference |
| Female | ||||
| Yes (n = 6510) | 3.6 | 0.8 (0.7 to 1.0) | 5.9 | 0.7 (0.4 to 1.4) |
| No (n = 6206) | 4.4 | Reference | 8.0 | Reference |
| Multiple gestation birth | ||||
| Yes (n = 316) | 3.2 | 0.8 (0.4 to 1.4) | 40.0 | 6.3 (2.7 to 14.4) |
| No (n = 12 400) | 4.1 | Reference | 6.4 | Reference |
| Caesarean birth | ||||
| Yes (n = 1593) | 6.5 | 1.8 (1.4 to 2.2) | 9.6 | 1.5 (0.8 to 3.0) |
| No (n = 11 123) | 3.7 | Reference | 6.4 | Reference |
| Maternal prenatal tobacco use | ||||
| Yes (n = 4593) | 3.7 | 0.9 (0.7 to 1.0) | 8.8 | 1.4 (0.8 to 2.7) |
| No (n = 8123) | 4.2 | Reference | 6.1 | Reference |
| Gestational age (weeks) | ||||
| <32 (n = 130) | 10.0 | 2.6 (1.5 to 4.4) | 15.4 | 2.5 (0.7 to 9.4) |
| 32–36 (n = 882) | 5.3 | 1.4 (1.0 to 1.8) | 12.8 | 2.0 (0.9 to 4.7) |
| ⩾37 (n = 11 704) | 3.9 | Reference | 6.2 | Reference |
| Small for gestational age | ||||
| Yes (n = 1900) | 4.0 | 1.0 (0.7 to 1.4) | 13.9 | 2.1 (0.9 to 5.2) |
| No (n = 11 816) | 4.0 | Reference | 6.5 | Reference |
| Education of mother <20 years old | ||||
| Yes (n = 2246) | 3.5 | 0.8 (0.7 to 1.1) | 14.0 | 1.2 (0.9 to 1.6) |
| No (n = 10 470) | 4.3 | Reference | 5.8 | Reference |
| Mother <12 years of school | ||||
| Yes (n = 3640) | 5.0 | 0.8 (0.7 to 1.0) | 4.8 | 0.6 (0.3 to 1.4) |
| No (n = 10 601) | 3.8 | Reference | 7.8 | Reference |
| Lower respiratory infection | ||||
| Any (n = 2421) | 11.4 | 5.0 (4.2 to 5.9) | 9.4 | 2.2 (1.1 to 4.5) |
| None (n = 10 295) | 2.3 | Reference | 4.2 | Reference |