The current study was a 7-year follow-up of 74 6–12 year old children with Pervasive Developmental Disorder-Not Otherwise Specified. We examined the rates and 7 year stability of comorbid psychiatric diagnoses as ascertained with the Diagnostic Interview Schedule for Children: Parent version at ages 6–12 and again at ages 12–20. Also, we examined childhood factors that predicted the stability of comorbid psychiatric disorders. The rate of comorbid psychiatric disorders dropped significantly from childhood (81 %) to adolescence (61 %). Higher levels of parent reported stereotyped behaviors and reduced social interest in childhood significantly predicted the stability of psychiatric comorbidity. Re-evaluation of psychiatric comorbidity should be considered in clinical practice, since several individuals shifted in comorbid diagnoses.

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Keywords Autism spectrum disorder, Comorbidity, Follow-up, Pervasive developmental disorders
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Journal Journal of Autism and Developmental Disorders
Verheij, C, Louwerse, I, van der Ende, J, Eussen, M.L.J.M, van Gool, A.R, Verheij, F, … Greaves-Lord, K. (2015). The Stability of Comorbid Psychiatric Disorders: A 7 Year Follow Up of Children with Pervasive Developmental Disorder-Not Otherwise Specified. Journal of Autism and Developmental Disorders, 45(12), 3939–3948. doi:10.1007/s10803-015-2592-5