Interpregnancy change in body mass index and infant outcomes in Texas: a population-based study

Table 4 IPC-BMI and index infant outcomes within maternal prepregnancy BMI strata at sibling pregnancy, Texas 2006–2012

Outcome	IPC-BMI	Prepregnancy BMI at Sibling Pregnancy
		Normal (18.5–24.9 kg/m²)			Overweight (25.0–29.9 kg/m²)			Obese (≥30.0 kg/m²)
		N^a	aOR	95% CI	N^a	aOR	95% CI	N^a	aOR	95% CI
LGA^b		96/1120			68/529			71/379
	< 0	18/273	0.64	(0.35, 1.16)	16/189	0.42	(0.19, 0.92)	28/161	1.27	(0.59, 2.76)
	0 to < 1	36/354	1.00	(Reference)	16/105	1.00	(Reference)	11/77	1.00	(Reference)
	≥1	42/493	0.86	(0.53, 1.39)	36/235	1.01	(0.52, 1.97)	32/141	2.13	(0.97, 4.68)
SGA^c		92/1125			47/550			NR/413
	< 0	31/260	2.04	(1.14, 3.64)	15/190	0.86	(0.36, 2.09)	17/172	2.20	(0.69, 6.97)
	0 to < 1	22/369	1.00	(Reference)	9/112	1.00	(Reference)	NR/84	1.00	(Reference)
	≥1	39/496	1.31	(0.76, 2.27)	23/248	0.99	(0.44, 2.27)	16/157	1.96	(0.61, 6.29)
PTB^d		129/1091			52/545			50/401
	< 0	41/250	1.87	(1.13, 3.07)	25/180	1.51	(0.69, 3.28)	26/163	0.96	(0.45, 2.06)
	0 to < 1	32/359	1.00	(Reference)	10/111	1.00	(Reference)	12/77	1.00	(Reference)
	≥1	56/482	1.35	(0.85, 2.15)	17/254	0.71	(0.31, 1.61)	12/161	0.40	(0.16, 0.95)

Abbreviations: aOR adjusted odds ratio, BMI body mass index (kg/m²), CI confidence interval, IPC-BMI interpregnancy change in body mass index (kg/m²), LGA large for gestational age, NR not reported due to small cell size and complementary suppression, PTB preterm birth, SGA small for gestational age
^aN, # affected / # unaffected
^bAdjusted for the following maternal variables: race/ethnicity, smoking, gestational weight gain, height, age, and education
^cAdjusted for the following maternal variables: race/ethnicity, smoking, gestational weight gain, and height
^dAdjusted for the following maternal variables: race/ethnicity, smoking, and gestational weight gain

ISSN: 1471-2393