Table 1: Demographic characteristics of pregnant women attending or contacting the Motherisk Program and, for socioeconomic status, their male partners
Characteristic	Group				p value
	Binge drinkers n = 272*		Control women n = 272*
Mean age, yr (and standard deviation [SD])	27.9	(5.6)	30.0	(5.1)	< 0.0001
Single, no. (and %)	59	(54.6)	13	(12.2)	< 0.0001
Ethnic background, no. (and %)	n = 85		n = 91		< 0.004
White	79	(92.9)	63	(69.2)
Oriental	2	(2.4)	9	(9.9)
East Indian	1	(1.2)	8	(8.8)
Black	2	(2.4)	8	(8.8)
Hispanic	1	(1.2)	1	(1.1)
Other	0		2	(2.2)
Mean gravidity (and SD)	2.14	(1.3)	2.10	(1.4)	0.73
Mean parity (and SD)	0.57	(0.9)	0.68	(0.9)	0.14
Mean no. of previous abortions per woman (and SD)
Elective	0.34	(0.7)	0.19	(0.5)	< 0.009
Spontaneous	0.23	(0.6)	0.27	(0.7)	0.51
Mean gestational age at contact, wk (and SD)	8.4	(6.2)	10.9	(8.3)	< 0.0001
Socioeconomic status, no. (and %)
Women	n = 109		n = 113		0.35
Student	13	(11.9)	6	(5.3)
Housewife	22	(20.2)	32	(28.3)
Unskilled labourer	14	(12.8)	13	(11.4)
Skilled labourer	40	(36.7)	42	(37.2)
Professional	20	(18.4)	20	(17.7)
Male partners	n = 109		n = 106		< 0.0007
Student	7	(6.3)	3	(2.8)
Unemployed	7	(6.3)	6	(5.7)
Unskilled labourer	26	(23.9)	32	(34.9)
Skilled labourer	42	(38.5)	16	(15.1)
Professional	27	(24.8)	44	(41.5)
*Information was not available for each woman in every category. The denominator varied from 85 to 270. Denominators are supplied for some rates.

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