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Communication Disorders: Prevalence and Comorbid Intellectual Disability, Autism, and Emotional/Behavioral Disorders

Robert Satterfield
Utah Department of Health, Salt Lake City

Judith Miller
Deborah Bilder
University of Utah

Shaheen Hossain
Utah Department of Health

William McMahon
University of Utah

Contact author: Judith Pinborough-Zimmerman, University of Utah, Salt Lake City, 650 Komas, Suite 206, Salt Lake City, UT 84108. E-mail: judith.zimmerman{at}hsc.utah.edu.

Purpose: To determine a population-based estimate of communication disorders (CDs) in children; the co-occurrence of intellectual disability (ID), autism, and emotional/behavioral disorders; and the impact of these conditions on the prevalence of CDs.

Method: Surveillance targeted 8-year-olds born in 1994 residing in 2002 in the 3 most populous counties in Utah (n = 26,315). A multiple-source record review was conducted at all major health and educational facilities.

Results: A total of 1,667 children met the criteria of CD. The prevalence of CD was estimated to be 63.4 per 1,000 8-year-olds (95% confidence interval = 60.4–66.2). The ratio of boys to girls was 1.8:1. Four percent of the CD cases were identified with an ID and 3.7% with autism spectrum disorders (ASD). Adjusting the CD prevalence to exclude ASD and/or ID cases significantly affected the CD prevalence rate. Other frequently co-occurring emotional/behavioral disorders with CD were attention deficit/hyperactivity disorder, anxiety, and conduct disorder.

Conclusions: Findings affirm that CDs and co-occurring mental health conditions are a major educational and public health concern.

Key Words: communication disorders, speech disorders, language impairment, mental health conditions, autism spectrum disorders

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