TABLE 2.

Raw means, SDs, and effect sizes for global standardized tests at all ages for placebo and DHA-supplemented groups¹

			Placebo			Supplemented
Assessment	Subtest or variable	Age (mo)	Mean	SD	n	Mean	SD	n	Effect size2 (d)
BSID	MDI	18	98.14	12.10	84	96.95	10.95	103	0.104
	PDI	18	94.93	8.36	84	95.11	9.31	104	0.020
	BRS total	18	119.07	7.92	83	117.48	8.67	103	0.191
WPPSI	Verbal IQ	36	100.99	14.22	77	101.10	16.51	91	0.007
	—	48	99.30	15.31	67	100.13	16.13	80	0.052
	—	72	101.53	14.20	70	102.44	14.88	81	0.063
	Performance IQ	36	94.37	15.73	74	96.07	14.35	90	0.114
	—	48	96.87	14.84	76	98.74	15.52	88	0.123
	—	72	98.96	16.22	70	101.07	14.77	82	0.137
	Processing Speed	48	90.27	14.58	70	92.37	13.31	81	0.151
	—	72	99.09	12.79	70	101.38	12.84	82	0.179
	Full Scale IQ	36	97.78	15.43	74	98.75	15.75	88	0.062
	—	48	97.52	15.32	66	99.72	16.10	79	0.140
	—	72	100.67	14.70	69	102.21	14.02	81	0.108

¹BRS, Behavior Rating Scale; BSID, Bayley Scales of Infant Development; IQ, intelligence quotient; MDI, Mental Development Index; PDI, Psychomotor Development Index; WPPSI, Wechsler Preschool and Primary Scale of Intelligence.

²None of the effects reported here for placebo compared with supplemented attained statistical significance.