Table 3

Subject characteristics


Patients N = 76
Siblings N = 31
Controls N = 31
Statistic
p-value

Age (SD)
21.5 (2.9)
22.8 (3.8)
21.5 (3.1)
F = 2.27
p = 0.11
Gender (M/F)
66/10
13/18
23/8
χ2 = 23.03
p <0.001
Educational level (SD)
4.45 (0.91)
4.76 (1.15)
4.83 (1.09)
F = 1.94
p = 0.15
VIQ (SD)
89.2 (14.3)
95.7 (11.1)
105.6 (16.9)
F = 14.68
p <0.001*
PIQ (SD)
85.7 (13.0)
98.6 (11.4)
106.4 (14.4)
F = 31.35
p <0.001*
FSIQ (SD)
86.7 (13.8)
96.7 (11.6)
107.0 (15.5)
F = 25.12
p <0.001*

Subject characteristics (age, gender, and educational level) and verbal, performance, and full scale IQ scores (VIQ, PIQ, and FSIQ). Between-group differences in age, educational level, and between VIQ, PIQ, and FSIQ are calculated using ANOVA. Between-group differences in gender are calculated using a χ2 test. The p-values marked with * result from an overall ANOVA; all pairwise comparisons are significant.

Zinkstok et al. Behavioral and Brain Functions 2007 3:19   doi:10.1186/1744-9081-3-19