The role of clinical phenotypes in understanding the genetics of obsessive-compulsive disorder.

Abstract excerpt

Studies have shown that genetic factors are significant in predisposing individuals to obsessive-compulsive disorder (OCD). Family studies have demonstrated significantly higher rates of OCD in parents and siblings of OCD probands with an age-corrected morbid risk ranging from approximately 10% to 35% in first-degree relatives. Twin studies suggest that this familiality is, in part, due to genetic factors, and...

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