Table 3.

Odds ratios and 95% confidence intervals for the association among maternal pre-pregnancy BMI, GWG and autism in all subjects

	OR	95% CI	p
Maternal pre-pregnancy BMIa
Underweight	0.958	0.746–1.231	0.738
Overweight/Obese	0.743	0.515–1.073	0.113
Gestational weight gainb
Inadequate weight gain	0.855	0.690–1.060	0.154
Excessive weight gain	1.327	1.021–1.725	0.034
BMI by GWG	1.064	1.009–1.123	0.023

BMI body mass index, GWG gestation weight gain

Child’s gender, child age, parental age, and family annual income were used as covariates

^aNormal BMI group was used as a reference

^bAdequate weight gain group was used as a reference