Table 2.
WISC-III Scale | Low birth weigh (<2500 g) n = 77 | Very low birth weight (1500-2500 g) n = 12 | Extremely low birth weight (<1500 g) n = 8 | Maternal education (rs) | Family income (rs) |
mean±SD | mean±SD | mean±SD | |||
IQF | 99.1±15.6a | 96.4±18.7 a | 98.8±14.4 a | 0.385c | 0.399 c |
IQV | 100.3±13.5a | 93.9±15.1 a | 100±14.4 a | 0.375 c | 0.376 c |
IQP | 98.3±16.6 a | 100±20.3 a | 98.0±13.4 a | 0.372 c | 0.397 c |
VCI | 99.3±12.5 a | 94.3±14.8 a | 98.1±14.4 a | 0.344b | 0.357 c |
POI | 98.4±16.3 a | 101.3±19.8 a | 98.0±13.5 a | 0.375 c | 0.399 c |
FDI | 98.9±15.1 a | 93.3±16.6 a | 101.5±13.7 a | 0.403 c | 0.366 c |
PSI | 95.0±12.8 a | 90.9±15.6 a | 94.4±6.80 a | 0.377 c | 0.396 c |
OBS: WISC-III: Wechsler Intelligence Scale for Children – III; IQF: full scale; IQV: verbal scale; IQP: performance scale; VCI: verbal comprehension index; POI: perceptual organization index; FDI: freedom from distractibility index; PSI: processing speed index. aOne-way ANOVA, results not significant (p>0.005). rs = correlation coefficient, bp<0.01, cp<0.001.