Problem behaviours and symptom dimensions of psychiatric disorders in adults with intellectual disabilities: An exploratory and confirmatory factor analysis

Melville, C. A. , Johnson, P. C. D. , Smiley, E., Simpson, N., Purves, D., McConnachie, A. and Cooper, S.-A. (2016) Problem behaviours and symptom dimensions of psychiatric disorders in adults with intellectual disabilities: An exploratory and confirmatory factor analysis. Research in Developmental Disabilities, 55, pp. 1-13. (doi:10.1016/j.ridd.2016.03.007) (PMID:27018744)

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Abstract

Background The limited evidence on the relationship between problem behaviours and symptoms of psychiatric disorders experienced by adults with intellectual disabilities leads to conflict about diagnostic criteria and confused treatment. This study examined the relationship between problem behaviours and other psychopathology, and compared the predictive validity of dimensional and categorical models experienced by adults with intellectual disabilities. Methods Exploratory and confirmatory factor analyses appropriate for non-continuous data were used to derive, and validate, symptom dimensions using two clinical datasets (n = 457; n = 274). Categorical diagnoses were derived using DC-LD. Severity and 5-year longitudinal outcome was measured using a battery of instruments. Results Five factors/dimensions were identified and confirmed. Problem behaviours were included in an emotion dysregulation-problem behaviour dimension that was distinct from the depressive, anxiety, organic and psychosis dimensions. The dimensional model had better predictive validity than categorical diagnosis. Conclusions International classification systems should not include problem behaviours as behavioural equivalents in diagnostic criteria for depression or other psychiatric disorders. Investigating the relevance of emotional regulation to psychopathology may provide an important pathway for development of improved interventions.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:McConnachie, Dr Alex and Simpson, Dr Neill and Johnson, Dr Paul and Purves, Mr David and Smiley, Dr Elita and Cooper, Professor Sally-Ann and Melville, Professor Craig
Authors: Melville, C. A., Johnson, P. C. D., Smiley, E., Simpson, N., Purves, D., McConnachie, A., and Cooper, S.-A.
College/School:College of Medical Veterinary and Life Sciences > Institute of Biodiversity Animal Health and Comparative Medicine
College of Medical Veterinary and Life Sciences > Institute of Health and Wellbeing > Mental Health and Wellbeing
College of Medical Veterinary and Life Sciences > Institute of Health and Wellbeing > Robertson Centre
College of Medical Veterinary and Life Sciences > School of Medicine, Dentistry & Nursing
Journal Name:Research in Developmental Disabilities
Publisher:Elsevier
ISSN:0891-4222
ISSN (Online):1873-3379
Published Online:25 March 2016
Copyright Holders:Copyright © 2016 Elsevier
First Published:First published in Research in Developmental Disabilities 55:1-13
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
576641Developing valid models of psychopathology experienced by adults with learning disabilitiesCraig MelvilleScottish Executive Health Department (SEHHD-CSO)CZG/2/556IHW - MENTAL HEALTH & WELLBEING