Table 8

 Odds ratios for use of prescribed asthma drugs at 5 years

Prescribed asthma drugs at 5 yearsGestation at birth (weeks)
<32 (n=166)32-33 (n=149)34-36 (n=856)37-38 (n=2851)39-41 (n=9964)
No (%)17 (11.3)11 (9.4)65 (7.6)121 (4.9)369 (3.4)
Unadjusted odds ratio (95% CI)3.6 (1.8 to 7.13)3.0 (1.5 to 5.8)2.4 (1.7 to 3.3)1.0 (0.6 to 1.9)1
Adjusted* odds ratio (95% CI)3.5 (1.7 to 7.2)2.8 (1.4 to 5.6)2.2 (1.6 to 3.1)1.4 (1.1 to 1.8)1

All percentages and odds ratios are weighted with sampling and non-response weights.

*Adjusted for child’s age at interview, sex, and ethnicity; mother’s age at birth, marital status, education, and occupation; whether child was mother’s firstborn; whether child was ever breast fed; and smoking and drinking during pregnancy.