|Titre :||Optimal scaling of the CAST and of SDS Scale in a national sample of adolescents (2013)|
|Auteurs :||L. BASTIANI ; V. SICILIANO ; O. CURZIO ; C. LUPPI ; M. GORI ; M. GRASSI ; S. MOLINARO|
|Type de document :||Article : Périodique|
|Dans :||Addictive Behaviors (Vol.38, n°4, April 2013)|
|Article en page(s) :||2060-2067|
|Discipline :||EPI (Epidémiologie / Epidemiology)|
Thésaurus TOXIBASEADOLESCENT ; DEPISTAGE ; ECHELLE D'EVALUATION ; CANNABIS ; TEST ; QUESTIONNAIRE ; ESPAD ; VALIDITE ; METHODE
|Mots-clés:||CAST ; SDS|
PURPOSE: Psychometric and screening properties of the Cannabis Abuse Screening Test (CAST) and of the Severity Dependence Scale (SDS) were investigated using DSM-IV diagnoses of cannabis dependence (CD) as external criteria. Performance of the SDS and of the CAST were compared.
METHODS: Cross-sectional European School Survey Project on Alcohol and Other Drugs (ESPAD) was carried out in Italy in 2009. The sample consisted of 5787 Italian adolescents aged 15-19 who reported cannabis last year use. Uni-dimensionality, internal reliability, external validity, and optimal scaling of the 6 items for CAST and 5 items for SDS were performed. The Munich Composite International Diagnostic Interview (M-CIDI) was used as a gold standard for DSM-IV diagnoses, and all outputs were assessed by 10-fold cross validation procedure.
RESULTS: Both scales were uni-dimensional and Cronbach's alpha was 0.74 for SDS and 0.78 for CAST. High and comparable area under curve (AUC) values indicate a good ability of both scales to discriminate between individuals with and without dependence diagnosis. Based on balanced sensitivity and specificity, the optimal cut-off scores for problematic use disorders were 7 for CAST MCA and 4 for SDS MCA. Both CAST and SDS overestimated CD prevalence.
CONCLUSIONS: The CAST and SDS are equally useful for screening for problematic cannabis use disorders. Both clinical and research applications of the scales are possible.
• A new scoring methodology for SDS and CAST screening questionnaire was proposed.
• This is the study with the highest number of adolescents screened.
• Optimal scaling of the 6 items for CAST and 5 items for SDS were performed.
• The CAST and SDS are equally useful for screening for problematic cannabis use.
• CAST MCA scoring version has better known-groups criterion validity.
|Domaine :||Drogues illicites / Illicit drugs|
|Affiliation :||Institute of Clinical Physiology of the Italian National Research Council (IFC-CNR), Pisa, Italy|