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Accepted VersionCC BY-NC-ND V4.0, Open Access
Journal article
Social cognitive predictors of treatment outcome in cannabis dependence
Drug and Alcohol Dependence, Vol.170, pp.74-81
2017
PMID: 27883947
Abstract
Background:
Drug-related outcomes expectancies and refusal self-efficacy are core components of Social Cognitive Theory. Both predict treatment outcome in alcohol use disorders. Few studies have reported expectancies and refusal self-efficacy in cannabis dependence. None have examined both, although both constructs are key targets in Cognitive-Behavioural Therapy (CBT). This study tests the predictive role of expectancies and refusal self-efficacy in treatment outcome for cannabis dependence.
Design:
Outpatients completed a comprehensive assessment when commencing cannabis treatment and predictors of treatment outcome were tested.
Setting:
A university hospital alcohol and drug outpatient clinic.
Participants:
221 cannabis-dependent patients participated in a 6-week CBT program where the goal was abstinence.
Measurements:
Cannabis Expectancy Questionnaire and Cannabis Refusal Self-Efficacy Questionnaire, cannabis dependence severity [Severity of Dependence Scale], psychological distress [General Health Questionnaire] at baseline; the timeline follow-back procedure at baseline and each session.
Findings:
Patients reporting lower confidence in their ability to resist cannabis during high negative affect (emotional relief refusal self-efficacy) had a lower likelihood of abstinence (p = 0.004), more days of use (p < 0.001), and larger amount used (p < 0.001). Negative cannabis expectancies predicted greater likelihood of abstinence (p = 0.024). Higher positive expectancies were associated with lower emotional relief self-efficacy, mediating its association with outcome (p < 0.001).
Conclusions:
Emotional relief refusal self-efficacy and negative expectancies are predictive of better treatment outcomes for cannabis dependence. Positive expectancies may indirectly predict poorer outcome because of a negative association with self-efficacy, but this conclusion remains tentative as directionality could not be established.
Details
- Title
- Social cognitive predictors of treatment outcome in cannabis dependence
- Authors
- Matthew J Gullo (Author) - The University of QueenslandMarya Matveeva (Author) - The University of QueenslandGerald F.X Feeney (Author) - The University of QueenslandRoss Young (Author) - Queensland University of TechnologyJason P Connor (Author) - The University of Queensland
- Publication details
- Drug and Alcohol Dependence, Vol.170, pp.74-81
- Publisher
- Elsevier Ireland Ltd.
- Date published
- 2017
- DOI
- 10.1016/j.drugalcdep.2016.10.030
- ISSN
- 1879-0046; 0376-8716
- PMID
- 27883947
- Copyright note
- Copyright © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
- Organisation Unit
- University of the Sunshine Coast, Queensland; Office of the Deputy Vice-Chancellor (Research and Innovation)
- Language
- English
- Record Identifier
- 99551606802621
- Output Type
- Journal article
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- Psychiatry
- Substance Abuse
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