title: Comorbidity as a predictor and moderator of treatment outcome in youth with anxiety, affective, attention deficit/hyperactivity disorder, and oppositional/conduct disorders.
abstract: In the present review, we examine one of the critical issues that have been raised about evidence-based treatments and their portability to real-world clinical settings: namely, the presence of comorbidity in the participants who have been treated in these studies and whether the presence of comorbidity predicts or moderates treatment outcomes. In doing so, we examine treatment outcomes for the four most commonly occurring childhood psychiatric disorders: Anxiety disorders, affective disorders, attention deficit/hyperactivity disorder (ADHD), and oppositional defiant disorder (ODD)/conduct disorder (CD). For each of these disorders, we first review briefly the prevalence of comorbidity in epidemiological and clinical samples and then highlight the evidence-based treatments for these disorders. We next determine the effects of comorbidity on treatment outcomes for these disorders. For the most part, comorbidity in the treated samples is the rule, not the exception. However, the majority of studies have not explored whether comorbidity predicts or moderates treatment outcomes. For the not insignificant number of studies that have examined this issue, comorbidity has not been found to affect treatment outcomes. Notable exceptions are highlighted and recommendations for future research are presented.
authors.affiliation: Department of Psychology, Child Study Center, Virginia Polytechnic Institute and State University, Blacksburg, VA 24060, United States.
authors.forename: Thomas H
authors.initials: TH
authors.lastname: Ollendick
authors.forename: Matthew A
authors.initials: MA
authors.lastname: Jarrett
authors.forename: Amie E
authors.initials: AE
authors.lastname: Grills-Taquechel
authors.forename: Laura D
authors.initials: LD
authors.lastname: Hovey
authors.forename: Jennifer C
authors.initials: JC
authors.lastname: Wolff
mesh_terms: D000293:Adolescent; D001008:Anxiety Disorders / Q000453:epidemiology / Q000523:psychology / Q000628:therapy*; D001289:Attention Deficit Disorder with Hyperactivity / Q000453:epidemiology / Q000523:psychology / Q000628:therapy*; D019958:Attention Deficit and Disruptive Behavior Disorders / Q000453:epidemiology / Q000523:psychology / Q000628:therapy*; D001521:Behavior Therapy; D002648:Child; D015928:Cognitive Behavioral Therapy; D015897:Comorbidity; D019955:Conduct Disorder / Q000453:epidemiology / Q000523:psychology / Q000628:therapy*; D055317:Evidence-Based Practice; D006801:Humans; D019964:Mood Disorders / Q000453:epidemiology / Q000523:psychology / Q000628:therapy*; D010989:Play Therapy; D011575:Psychoanalytic Therapy; D016032:Randomized Controlled Trials as Topic; D016896:Treatment Outcome