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Validation of the cannabis abuse screening test in a sample of cannabis inpatients
Stockholm University, Faculty of Social Sciences, Centre for Social Research on Alcohol and Drugs (SoRAD).
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2012 (English)In: European Addiction Research, ISSN 1022-6877, E-ISSN 1421-9891, Vol. 18, no 4, 193-200 p.Article in journal (Refereed) Published
Abstract [en]

The present study aims at validating the Cannabis Abuse Screening Test (CAST) in a clinical sample of adolescent and young adult cannabis users seeking treatment. Applying a classical test theory approach using DSM-IV diagnoses as gold standard, two versions of the CAST questionnaire are compared. The sample consisted of 140 subjects aged 15-26 years (mean 18.9) recruited from two cannabis treatment centers. Gold standard diagnoses were assessed using the Adolescent Diagnostic Interview-Light. Internal structure and consistency of the CAST were assessed by principal component analysis and Cronbach's alpha. Optimal thresholds were defined using receiver operating characteristic analysis. Both the binary and the full test version revealed unidimensional structures with moderate to satisfactory internal consistency (alpha = 0.66 and 0.73). Screening properties were unsatisfactory when the CAST was compared against cannabis dependence. With regard to cannabis use disorders, both test versions yielded comparable and good sensitivity and specificity at cut-off 3 (binary: 92.2%, 66.7%) and 6 (full: 93.0%, 66.7%). Overall, the full CAST may be used for screening cannabis use disorders in clinical settings. Further research may use validation methods that do without gold standard.

Place, publisher, year, edition, pages
2012. Vol. 18, no 4, 193-200 p.
Keyword [en]
Cannabis-related problems, Cannabis Abuse Screening Test, Diagnostic instruments, France, Validity and reliability, Adolescents, Young adults, Abuse and dependence
National Category
Substance Abuse
URN: urn:nbn:se:su:diva-81697DOI: 10.1159/000336553ISI: 000307876500006OAI: diva2:563844


Available from: 2012-10-31 Created: 2012-10-30 Last updated: 2012-10-31Bibliographically approved

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Kraus, Ludwig
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Centre for Social Research on Alcohol and Drugs (SoRAD)
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ReferencesLink to record
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