Table 2.

Associations among Maternal Socioeconomic Status Score and Maternal and Child Characteristics

		Mean ± SD	P-valuea
Group	Placebo	1.92 ± 1.04	0.30
	DHA	2.08 ± 0.97
Race/ethnicity	White	2.54 ± 0.75	<0.0001
	Black	1.02 ± 0.56
	Hispanic	1.18 ± 0.92
	Other	2.43 ± 0.53
Maternal smoking	Never	2.17 ± 1.01	0.017
	Yes	1.81 ± 0.96
Breast feeding	None	1.42 ± 0.76	<0.0001
	Some	2.14 ± 1.01
Offspring sex	Female	1.98 ± 0.97	0.74
	Male	2.02 ± 1.05
		Correlationb	P-valueb
	Maternal age	0.69	<0.0001
	Maternal education (yr)	0.83	<0.0001
	Zip code income ($1 k)	0.80	<0.0001
	Maternal height (cm)	0.18	0.0135
	Maternal weight (kg)	-0.22	0.0023
	BMI at enrollment	-0.29	<0.0001
	Gestational weight gain (kg)	0.16	0.029
	Birthweight (g)	0.17	0.0227
	Formula fed(days)	-0.36	<0.0001
	Breast fed (days)	0.47	<0.0001
	RBC DHA at enrollment (%)	0.17	0.017
	RBC DHA at delivery (%)	0.32	<0.0001
	RBC DHA change (%)	0.22	0.0024
	Adherence (% of capsules consumed)	0.26	0.0003

^aThe P-value was calculated by the Mann-Whitney U test

^bSpearman’s correlation and corresponding P-value