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Table 3 Subject characteristics

From: Association between the DTNBP1 gene and intelligence: a case-control study in young patients with schizophrenia and related disorders and unaffected siblings

  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*
  1. 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.