Table 1.

Descriptive characteristics of women in the Pregnancy, Infection and Nutrition Study from 2002 to 2005 by Three Restrained Eating Subscales, n=1223

		Revised Restraint Scale			Weight Cyclers Subscale			Concern with Dieting Subscale
Maternal characteristic	Overall	Restrained n = 559	Non-restrained n = 557	p-valuea	Cyclers n = 563	Non-cyclers n = 557	p-valuea	Dieters n = 622	Non-dieters n = 595	p-valuea
Age (y) (%)
< 20	5	3	7	0.000	2	7	0.003	3	8	0.000
20 – 30	53	52	55		53	54		49	58
> 30	42	46	38		44	40		49	34
Pregravid BMI (kg/m2)b (%)
Underweight	14	6	23	0.000	5	24	0.000	9	19	0.000
Normal	51	45	58		41	61		48	53
Overweight	11	14	8		15	7		13	9
Obese	24	35	11		39	8		29	19
Educational status (%)
High school	20	16	23	0.009	20	19	0.000	15	25	0.000
Some college	47	51	44		52	42		48	47
College graduate and above	33	33	33		27	39		37	28
Race (%)
White	73	73	73	0.731	70	76	0.000	77	68	0.000
African American	19	19	18		23	14		15	23
Other	8	8	9		7	10		8	9
Married (%)	76	78	75	0.275	74	79	0.031	82	68	0.000
Nulliparous (%)	49	50	50	0.953	47	52	0.136	52	46	0.053
Smoking during pregnancy (%)	10	10	9	0.042	12	7	0.001	7	13	0.001
Percent of poverty line (%)
<185%	21	20	21	0.028	23	18	0.029	16	26	0.000
185–350%	19	17	21		18	21		16	22
>350%	57	61	54		56	58		65	48

^ap value is based on a χ² test of homogeneity to test for the association between maternal characteristics and restrained eating.

^bPrepregnancy BMI is categorized using the 1990 IOM BMI cutpoints specific for pregnancy: underweight, BMI <19.8 kg/m2; normal weight, BMI 19.8 to 25.9 kg/m2; overweight, BMI 26 to 29.9 kg/m2; and obese, BMI ≥ 30 kg/m2.