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Le Touquet – Paris-Plage, France

Guillem E.,Groupe Hospitalier Lariboisiere Fernand Widal APHP | Guillem E.,University Paris Diderot | Notides C.,Hopital Hotel Dieu APHP | Vorspan F.,Groupe Hospitalier Lariboisiere Fernand Widal APHP | And 6 more authors.
American Journal on Addictions | Year: 2011

The aim of this study was to evaluate the psychometric properties of the French version of the Marijuana Effect Expectancy Questionnaire (48 items) and study the cannabis expectancies according to the patterns of substance use and psychiatric disorders (DSM-IV). A sample of 263 subjects (average age 33.1 years [SD = 8.7], 56% men) consisting of cannabis users (n = 64), psychiatric inpatients (n = 175, most of whom were hospitalized for withdrawal), and a control group (n = 24) completed the questionnaire. Internal reliability was good (α=.87) and temporal reliability was satisfactory, with 24 of 48 items having a significant κ≥.41. Factor analysis showed four main factors that explained 42.1% of the total variance. The women feared Cognitive Impairment and Negative Effects, and Negative Behavioral Effects more than the men. The onset age of cannabis use, onset age of abuse, abuse and dependence were associated with fewer negative expectancies. Cannabis dependents differed from abusers by more Relaxation and Social Facilitation expectancies. Patients with major depressive episodes, panic disorder, social anxiety disorder, or posttraumatic stress disorder feared negative effects the most. Schizophrenic patients expected more Perceptual Enhancement and Craving. The French version of the Marijuana Effect Expectancy Questionnaire has good psychometric properties and is valid to assess cannabis expectancies in adolescents and adults with substance use disorders. © American Academy of Addiction Psychiatry. Source


Guillem E.,University Paris Diderot | Notides C.,Hopital Hotel Dieu APHP | Debray M.,University Paris Diderot | Vorspan F.,University Paris Diderot | And 4 more authors.
Journal of Addictions Nursing | Year: 2011

This study evaluates the French version of the Cannabis Use Disorders Identification Test (CUDIT) in a clinical sample with a high rate of cannabis misuse. A group of 194 cannabis users, including 134 outpatients (Group 1) seen at a specific cannabis clinic and 60 drug/alcohol addicts hospitalized for withdrawal (Group 2), filled out the CUDIT. The majority (82% of the sample) were cannabis dependent or abusers (DSM-IV). Internal reliability was assessed by Cronbach's alpha, item-total correlation by Spearman's rho and temporal reliability by the test-retest method. Construct validity was evaluated by factor analysis. Convergent validity was evaluated by measuring the correlation with the quantity of cannabis consumed. The cut-off score used to distinguish cannabis users from misusers was set using a Receiver Operating Characteristic curve analysis. Cronbach's alpha was high (0.83). There was no significant difference between the total test and retest scores (p = 0.1) indicating good temporal reliability. Principal component analysis identified 2 principle factors that explained 53.1% of the total variance. Convergent validity was significant and satisfactory. The cut-off value was 10, which corresponded to the optimal sensitivity (94.4%) and positive predictive value (90.4%). However, the item-total correlation and the correlation with abuse and dependence severity were mediocre for item 9. It should be removed because of its poor psychometric properties. The CUDIT is a satisfactory screening instrument for cannabis use disorders in at-risk populations. © 2011 International Nurses Society on Addictions. Source

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