Chapter 1. Prenatal Survey

Table 1.4. Percent of pregnant women having each category of prepregnancy body mass index (BMI) by selected demographics^{1, 2} Infant Feeding Practices Study II
	N	<18.5	18.5 - 25.0	25.1 - 29.9	30.0 - 39.9	40.0 or more	Total (%)
ALL	4,826	5.3	47.5	23.6	18.6	5.1	100
Age
18-24	1,353	8.5	50.1	22.8	15.7	3.0	100
25-29	1,558	4.9	47.7	22.7	19.6	5.1	100
30-34	1,203	3.7	46.0	24.3	19.2	6.9	100
35+	700	2.7	44.6	25.9	21.0	5.9	100
Parity
Primiparous	1,499	6.0	51.7	20.9	17.4	3.9	100
Multiparous	3,154	4.9	45.2	25.0	19.4	5.6	100
Education
HS or less	1,043	5.9	44.4	22.6	21.2	5.8	100
Some college	1,732	4.6	43.6	25.0	21.0	5.8	100
College graduate	1,448	3.7	52.8	23.7	16.1	3.8	100
Income (% of poverty)
< 185%	2,168	6.3	43.9	24.1	19.9	5.9	100
185- < 350%	1,657	4.8	48.6	23.3	18.3	4.9	100
>=350%	1,001	4.0	53.4	23.0	16.1	3.5	100
WIC Participant
No	3,208	4.6	50.2	23.0	17.9	4.4	100
Yes	1,610	6.8	42.2	24.7	19.8	6.5	100
Race
White	3,815	5.2	47.2	23.4	19.3	4.9	100
Black	291	3.4	40.2	31.3	17.2	7.9	100
Hispanic	327	4.9	47.7	25.7	17.1	4.6	100
Region
Northeast	815	4.7	50.9	21.6	18.5	4.3	100
Midwest	1,390	5.3	46.6	23.2	18.8	6.0	100
South	1,675	5.7	45.7	25.6	18.1	4.8	100
West	946	5.0	48.9	22.3	19.0	4.8	100
¹Table is based on variables: P7, P8FT, P8IN ²BMI is calculated as the weight (P7) divided by height (P8FT & P8IN) squared after converting measurements to metric and using kg/m²