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. Author manuscript; available in PMC: 2009 Sep 1.
Published in final edited form as: Biol Psychol. 2007 Nov 1;79(1):103–110. doi: 10.1016/j.biopsycho.2007.10.011

Table 2.

Sample Characteristics for Subjects with Brain Volume Data by Genotype

Phe Carriers (N=11) Leu/leu Homozygotes (N=33) Statistic df p
Sample Characteristics
Group (Patients, Healthy Volunteers) 5/6 14/19 χ2 = .03 1 .86
Sex (Male, Female) 8/3 17/16 χ2 = 1.51 1 .22
Handedness (Right, Left) 9/2 29/4 χ2 = .26 1 .61
Age (years) 26.0 (6.8) 27.0 (6.3) t = −.48 42 .64
Education (years) 14.9 (2.4) 14.4 (1.9) t = .76 42 .45
Brain Volume Data (cm3)
Superior Frontal Gray Matter 29.96 (6.23) 33.49 (5.35)
Anterior Cingulate Gray Matter 7.41 (1.10) 8.57 (1.54)
Total Orbital Frontal Gray Matter 10.97 (2.80) 10.86 (2.34)
Total Intracranial Volume 1351 (87) 1371 (163)

Notes. Data are presented as mean ± SD in parentheses, unless otherwise indicated.