Table 2.

Psychometric Test Scores on ELBW and Control Teens

VariablesELBWAll ELBW
500 to 1000 g
Mean (SD)
Control
>2500 g
Mean (SD)
All ELBW Versus Controls
<750 g
Mean (SD)
750 to 1000 g
Mean (SD)
P95% CI of Differences
All teens
 WISC-R DQ86 (20)91 (18)89 (19)102 (13)<.00018.8 –16.6
 WRAT-R
  Reading79 (21)86 (21)85 (21)101 (15)<.000111.8 –20.8
  Spelling77 (21)86 (20)*83 (20)101 (15)<.000112.7 –21.4
  Arithmetic70 (17)77 (18)*75 (18)92 (15)<.000113.3 –21.3
Apparently normal teens
 WISC-R DQ100 (8)99 (9)99 (9)104 (11)<.0012.1 –7.9
 WRAT-R
  Reading96 (17)94 (16)94 (16)102 (15)<.00013.8 –12.6
  Spelling90 (22)92 (16)91 (17)102 (13)<.00016.2 –14.8
  Arithmetic84 (11)84 (14)84 (13)94 (14)<.00016.3 –14.1
  • * P < .05.

  • Apparently normal teens are children with no NSIs and IQ ≥85 (ELBW: n = 85; controls: n = 113).