TABLE 5.

Association of Maternal Recorded Prepregnancy BMI and Weekly Weight Gain Categories With Neonatal, Post neonatal, and Infant Deaths

Maternal Prepregnancy BMI (kg/m²)	Weight Gain During Pregnancy (kg/wk)	Neonatal Death OR (95% CI)	Post neonatal Death OR (95% CI)	Infant Death OR (95% CI)
<18.5	<0.15	7.30 (2.27–23.47)	3.92 (1.12–13.68)	5.67 (1.94–16.64)
	0.15–0.29	1.73 (0.99–3.01)	1.61 (0.90–2.89)	1.68 (1.06–2.66)
	0.30–0.44	0.94 (0.53–1.65)	1.73 (1.06–2.84)	1.32 (0.87–1.99)
	≥0.45	0.63 (0.28–1.42)	0.89 (0.41–1.96)	0.74 (0.40–1.37)
18.5–24.9	<0.15	4.61 (2.95–7.22)	3.10 (1.91–5.03)	3.90 (2.65–5.74)
	0.15–0.29	1.47 (1.09–1.98)	1.36 (1.00–1.86)	1.43 (1.12–1.81)
	0.30–0.44^a	1.00	1.00	1.00
	≥0.45	0.82 (0.60–1.12)	0.96 (0.69–1.34)	0.89 (0.69–1.14)
25–29.9	<0.15	2.36 (1.41–3.92)	1.23 (0.64–2.38)	1.81 (1.15–2.85)
	0.15–0.29	1.92 (1.27–2.90)	1.10 (0.67–1.79)	1.52 (1.07–2.16)
	0.30–0.44	0.74 (0.45–1.22)	1.64 (1.09–2.47)	1.13 (0.78–1.62)
	≥0.45	1.14 (0.69–1.87)	1.38 (0.83–2.29)	1.24 (0.83–1.86)
≥30	<0.15	2.24 (1.37–3.66)	1.06 (0.58–1.93)	1.71 (1.12–2.61)
	0.15–0.29	2.37 (1.50–3.74)	0.74 (0.39–1.41)	1.58 (1.05–2.37)
	0.30–0.44	1.81 (1.05–3.13)	1.20 (0.61–2.34)	1.53 (0.95–2.45)
	≥0.45	2.29 (1.28–4.10)	1.46 (0.71–3.02)	1.94 (1.16–3.24)

Adjusted for race, maternal age at pregnancy, maternal education, maternal smoking during pregnancy, child’s sex, live birth order, and plurality.

Reference category.