Measuring cannabis consumption: Psychometric properties of the Daily Sessions, Frequency, Age of Onset, and Quantity of Cannabis Use Inventory (DFAQ-CU).

摘要: Objective We created the Daily Sessions, Frequency, Age of Onset, and Quantity Cannabis Use Inventory (DFAQ-CU) because current lack psychometrically sound inventories for measuring these dimensions cannabis use has impeded research on effects in humans. Method A sample 2,062 users completed DFAQ-CU was used to assess DFAQ-CU’s factor structure reliability. To validity, a subsample 645 participants additional measures dependence problems (Marijuana Smoking History Questionnaire [MSHQ], Timeline Followback [TLFB], Abuse Screening Test [CAST], Disorders Identification Revised [CUDIT-R], Problems [CUPIT], Alcohol Disorder [AUDIT]). Results six-factor revealed, with factors measuring: daily sessions, frequency, age onset, marijuana quantity, concentrate edibles quantity. The were reliable, Cronbach’s alpha coefficients ranging from .69 (daily sessions) .95 (frequency). Results further provided evidence factors’ convergent (MSHQ, TLFB), predictive (CAST, CUDIT-R, CUPIT), discriminant validity (AUDIT). Conclusions The is first inventory quantity use. It contains pictures facilitate measurement used, as well questions different forms (e.g., concentrates, edibles), methods administering joints, hand pipes, vaporizers), typical THC levels. As such, should help onset