Table 3

Psychometric test scores at 8 years and adolescence of infants born <33 weeks gestation (n = 66)

Age at test
8 years14–15 yearsp
*Paired t test.
†Wilcoxon signed rank test.
WISC-R full scale IQ, mean (SD)104 (18)95 (18)<0.0001*
WISC subscales, mean (SD)
Performance IQ98 (16)95 (21)NS
    Picture completion11 (3)9 (3)<0.0001*
    Block design10 (3)9 (3)<0.0001*
Verbal IQ109 (19)95 (18)<0.0001*
    Similarities12 (4)10 (3)<0.0001*
    Vocabulary12 (3)10 (4)<0.0001*
VMI, mean (SD)42 (28)54 (38)NS