Abstract
Positive association between obsessive compulsive disorder (OCD) and the A-allele of the 5-HT(2A)-receptor promoter polymorphism -1438G/A has recently been reported in adults. We performed an association analysis of this polymorphism in 55 children and adolescents with OCD and in 223 controls consisting of unrelated students. We detected statistically significant differences in genotype (P < 0.05) and allele frequencies (P < 0.05) between individuals with OCD and controls. In this, to our knowledge, first association study based on children and adolescents with OCD, we confirm an association of the A-allele of the 5-HT2A receptor gene with OCD.
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