. Author manuscript; available in PMC: 2013 Jun 4.

Published in final edited form as: Hum Genet. 2012 Feb 24;131(7):1187–1195. doi: 10.1007/s00439-012-1150-x

Table 1.

Demographic Characteristics and BDNF Allele and Genotype Distributions in Normal Controls and Patients with Schizophrenia

Variable	Normal Controls (n=445)	Schizophrenia (n=657)	Statistic (P Value)
Sex (Male/Female)	263/182	578/79	122.4 (<0.001)
Age (years)	44.9±13.6	48.4±13.7	25.4 (<0.001)
Education (years)	9.7±5.4	9.0±5.6	2.1 (0.15)
Body Mass Index (kg/m²)	25.1±4.2	24.7±4.0	2.3 (0.13)
Allele frequency (%)
Val	50.3%	53.7%	2.37(0.12)
Met	49.7%	46.3%	2.57(0.28)
Genotype frequency (%)
Val/Val	104 (23.6%)	175 (27.0%)
Met/Val	236 (53.5%)	347 (53.4%)
Met/Met	101 (22.9%)	127 (19.6%)