Does substance use predict contact with the criminal justice system for people with intellectual disabilities?

Eddie Chaplin (South London and Maudsley NHS Foundation Trust, London, UK)
Ilias Partsenidis (Derbyshire Healthcare NHS Foundation Trust, Derby, UK)
Blessing Samuriwo (South London and Maudsley NHS Foundation Trust, London, UK)
Lisa Underwood (Forensic and Neurodevelopmental Sciences, Institute of Psychiatry, King’s College London, London, UK)
Jane McCarthy (East London NHS Foundation Trust, London, UK)

Journal of Intellectual Disabilities and Offending Behaviour

ISSN: 2050-8824

Publication date: 8 September 2014

Abstract

Purpose

The purpose of this paper is to examine how substances misuse impacts on exposure to the criminal justice system for people with intellectual disabilities (ID).

Design/methodology/approach

An electronic case-register of mental health patients was used to examine the clinical records of 411 patients with ID. χ2 analysis was performed to test the association between variables and logistic regression to generate estimates for statistically significant association variables.

Findings

Of 411 cases, 98 (23 per cent) of patient had a history of substance use, with affective disorders strongly associated with alcohol misuse χ2=4.135, df=1 (p<0.042), similarly statistically significant predictor for alcohol misuse OR: 1.7, 95 per cent CI (1.02-2.72) (p<0.043). Patients with a history of offending behaviour had three-folds higher risk to misuse drugs compared to those without a forensic conviction OR: 3.17, 95 per cent CI (1.35-7.44) (p<0.008). Those with a history of offending were more likely to have had a history of substance use.

Originality/value

Substance use and its impact on offending by people with ID is still poorly understood. This paper adds new information to this under researched area.

Keywords

Citation

Chaplin, E., Partsenidis, I., Samuriwo, B., Underwood, L. and McCarthy, J. (2014), "Does substance use predict contact with the criminal justice system for people with intellectual disabilities?", Journal of Intellectual Disabilities and Offending Behaviour, Vol. 5 No. 3, pp. 147-153. https://doi.org/10.1108/JIDOB-05-2014-0007

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Publisher

:

Emerald Group Publishing Limited

Copyright © 2014, Emerald Group Publishing Limited

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