Titre : | The Marijuana Screening Inventory (MSI-X): Reliability, factor structure, and scoring criteria with a clinical sample (2004) |
Auteurs : | D. ALEXANDER ; P. LEUNG |
Type de document : | Article : Périodique |
Dans : | American Journal of Drug and Alcohol Abuse (Vol.30, n°2, 2004) |
Article en page(s) : | 321-351 |
Langues: | Anglais |
Discipline : | PRO (Produits, mode d'action, méthode de dépistage / Substances, action mode, screening methods) |
Mots-clés : |
Thésaurus mots-clés PSYCHOMETRIE ; SENSIBILITE ; CANNABIS ; DEPISTAGE ; TEST ; DSM (III,IV,5) ; FIABILITE ; ETUDE CLINIQUEThésaurus géographique ETATS-UNIS |
Résumé : |
Objective: This study continues the psychometric evaluation of a 31-item Marijuana Screening Inventory (MSI-X) with adults referred to a substance abuse clinic, by determining MSI-X reliability, factor structure, scoring cutoff accuracy, sensitivity, and specificity with a DSM-IV-TR criterion measure.
Method: A “marijuana inventory” containing demographic, MSI-X, and DSM IV-TR diagnostic items was administered to 107 adults undergoing substance-use evaluation. Results: The MSI-X reliability was. 90 with factor analysis deriving nine factors explaining 72.2% of the variance. Varimax rotation supports retention of all 31 items on nine factor-based scales. Receiver operating characteristic analysis determined MSI-X accuracy and cutoff points in relation to four DSM IV-TR diagnostic classifications. The MSI-X obtained the highest probability (.91) for accuracy in identifying both cannabis dependence and abuse, with six the optimal cutoff for maximum sensitivity (.83) and specificity (.89). Thus, MSI-X scores of >= 6 are considered high risk. A cutoff score of 3 was associated with (probability,. 90; sensitivity,. 85; specificity,. 81) identifying cannabis abuse only risk, providing a 3 to 5 score in the moderate risk range. Conclusions: Clinical sample data supports the psychometric usefulness of the MSI-X as a screening tool. Marijuana lifetime use was 90% and past-year use 48%. The MSI-X identified 43% of lifetime users and 29% of past year users with moderate to high risk marijuana patterns deserving comprehensive evaluation. More males (15.9%) than females (7.5%) obtained MSI-X high-risk scores. The MSI-X empirically derived cutoff scores are within one point of the theoretical clinical cutoffs previously reported. |
Domaine : | Drogues illicites / Illicit drugs |
Affiliation : | University of Houston Graduate School of Social Work, Houston, Texas, USA |
Cote : | Abonnement |
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