Table 4.

Intelligence quotients (IQs) measured by Weschler revised intelligence scale for children^* (verbal, performance, and overall IQ) at 7½ to 8 years according to diet for infants who received highest intakes of trial diet. Standard term formula and preterm formula compared as sole diets (trial A), as supplements to mother’s milk (trial B), and in trials A and B combined. Values are group means (SE)

Detail	Milk formula		Advantage for preterm formula (95% CI)
	Term	Preterm
Trial A
No of subjects†	56	56
Verbal IQ	93.3 (2.3)	98.2 (1.9)	4.9 (−0.9 to 10.7)
Performance IQ	96.3 (2.0)	96.6 (2.3)	0.3 (−5.8 to 6.3)
Overall IQ	94.6 (1.9)	97.6 (1.9)	3.0 (−2.3 to 8.3)
Trial B
No of subjects†	55	51
Verbal IQ	96.3 (2.5)	100.7 (2.9)	4.4 (−3.1 to 12.0)
Performance IQ	100.5 (2.3)	103.4 (2.3)	2.9 (−3.6 to 9.5)
Overall IQ	97.7 (2.2)	102.5 (2.3)	4.6 (−1.8 to 11.0)
Trial A and B
No of subjects†	111	107
Verbal IQ	94.8 (1.7)	99.4 (1.7)	4.6 (−0.07 to 9.3)‡
Performance IQ	98.4 (1.5)	99.8 (1.7)	1.4 (−3.1 to 5.9)
Overall IQ	96.2 (1.5)	99.9 (1.5)	3.7 (−0.5 to 7.8)

^*Abbreviated form; see text. 

^†Numbers vary by up to two subjects in individual cells; see text. 

^‡P=0.053 by t test.