Table 3.

Association between categories of maternal body mass index (BMI) in early pregnancy and prevalent asthma in the offspring (overall effect 1–16 years^*) (N = 3294)

Maternal BMI (kg/m2)	OR	95% CI	OR	95% CI
< 18.5	1.29	0.83–2.01	1.20	0.73–1.97
18.5–24.9	Referent		Referent
25–29.9	1.14	0.90–1.45	1.12	0.87–1.45
≥ 30	1.53	1.04–2.26	1.24	0.80–1.94
P for trend		0.03		0.23

Odds ratio (OR) and 95% confidence intervals (CI) are obtained from Generalized estimating equation (GEE) analyses.

Adjusted for gender, maternal age, parental history of allergic disease, older siblings, socio-economic status and maternal smoking in pregnancy and/or at baseline.

Additionally adjusted for overweight in the offspring at each age.

Trend for normal weight, overweight and obese.