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  • Title: Validation of the presence of comorbidities in a Danish clinical cohort of children with Tourette syndrome.
    Author: Mol Debes NM, Hjalgrim H, Skov L.
    Journal: J Child Neurol; 2008 Sep; 23(9):1017-27. PubMed ID: 18827268.
    Abstract:
    Tourette syndrome (TS) is characterized by the presence of motor and vocal tics and is often accompanied by comorbid symptoms. We assessed the frequency of the comorbid symptoms obsessive-compulsive disorder obsessive-compulsive disorder, attention-deficit hyperactivity disorder (ADHD), rage attacks, sleeping disturbances, and depressive symptoms in a Danish clinical cohort of 314 children with TS using validated diagnostic instruments. For the assessment of symptoms of seasonal affective disorder and stuttering, we used a nonvalidated systematic interview. In total, only 10.2% of the children did not have any comorbid symptoms at all. If ADHD and/or obsessive-compulsive disorder were present, the rates of the comorbidities rage, symptoms of seasonal affective disorder, sleep disturbances, and depressive symptoms were significantly higher than if ADHD and/or obsessive-compulsive disorder were absent. The most severe tics were found in the group for which both ADHD and obsessive-compulsive disorder were present. Furthermore, there was a tendency toward more severe tics if other comorbid symptoms were present.
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