Addictive Behaviours Research Group, Department of Psychology, University of Oviedo, UCA, Facultad de Psicología, Pza Feijoo s/n, Oviedo, Asturias, Spain.
Subst Abuse Treat Prev Policy. 2012 Apr 2;7:13. doi: 10.1186/1747-597X-7-13.
Cannabis use among young people is a significant problem, making particularly necessary validated screening instruments that permit secondary prevention. The purpose of this study was to analyze and compare the psychometric properties of the CAST and CPQ-A-S questionnaires, two screening instruments specifically addressing the youth population.
Information was obtained on sociodemographics, frequency of substance use, psychopathological symptoms and cannabis-use problems, and the CPQ-A-S and CAST were applied, as well as an infrequency scale for discarding responses made randomly. The sample was made up of 144 young people aged 16 to 20 that had used cannabis in the last month, of which 71.5% were boys. Mean age of the sample was 17.38 years (SD = 1.16).
The results show that from the psychometric point of view both the CAST and the CPQ-A-S are good screening instruments.
The CAST is shorter and presents slightly better internal consistency than the CPQ-A-S. Both instruments show high sensitivity and specificity in the detection of young people dependent on cannabis according to the DSM IV-TR criteria. The CPQ-A-S appears to show greater capacity for detecting psychopathological distress associated with use. Both questionnaires yield significant odds ratios as predictors of frequent cannabis use and of the DSM IV-TR abuse and dependence criteria. In general, the CPQ-A-S emerges as a better predictor than the CAST.
年轻人吸食大麻是一个严重的问题，因此特别需要有效的筛选工具来进行二级预防。本研究的目的是分析和比较 CAST 和 CPQ-A-S 问卷这两种专门针对青年人群的筛选工具的心理测量特性。
收集了社会人口统计学信息、物质使用频率、精神病理症状和大麻使用问题，并应用了 CPQ-A-S 和 CAST 问卷，以及用于排除随机应答的不频繁量表。该样本由 144 名过去一个月内使用过大麻的 16 至 20 岁的年轻人组成，其中 71.5%为男性。样本的平均年龄为 17.38 岁（标准差=1.16）。
从心理测量学的角度来看，CAST 和 CPQ-A-S 都是良好的筛选工具。
CAST 比 CPQ-A-S 更短，内部一致性略高。根据 DSM-IV-TR 标准，两种工具在检测依赖大麻的年轻人方面均具有较高的灵敏度和特异性。CPQ-A-S 似乎更能检测到与使用相关的精神病理困扰。两个问卷都得出了显著的优势比，作为频繁使用大麻和 DSM-IV-TR 滥用和依赖标准的预测指标。总体而言，CPQ-A-S 比 CAST 更能预测。
