Table 3.

Effect of weight gain on odds of birth weight ≥4 kg unadjusted and adjusted for maternal age and body mass index (BMI) calculated at <18 weeks gestation in the index pregnancy

	Unadjusted			Adjusted for maternal age and BMI
	OR	95% CI	p Value	OR	95% CI	p Value
Weight gain from pregnancy 1 to 2	1.03	0.99 to 1.07	0.169	1.05	1.01 to 1.10	0.024
Weight gain from pregnancy 2 to 3	1.02	0.98 to 1.06	0.243	1.03	0.99 to 1.08	0.107
Weight gain from pregnancy 1 to 3	1.03	1.00 to 1.06	0.093	1.04	1.01 to 1.08	0.013