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. 2013 Jul;68(7):915–921. doi: 10.6061/clinics/2013(07)05

Table 2.

Performance on the WISC-III scale and its association with birth weight, maternal education and family income (n = 97).

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.