The National Institute of Mental Health study of children with severe obsessive-compulsive disorder has shown that more than half of these children also are diagnosed with

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The National Institute of Mental Health study of children with severe obsessive-compulsive disorder showed that more than half of these children also have a major mood disorder. This indicates a strong link between OCD and mood disorders such as depression and bipolar disorder. While children with OCD may also have other co-occurring conditions such as oppositional-defiant disorder, conduct disorder, or psychotic thinking, the study specifically shows a high prevalence of major mood disorders in this population.

The National Institute of Mental Health Study of Children with Severe