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Psychometric properties of the CAST and SDS scales in young adult cannabis users

机译：CAST和SDS量表在年轻成人大麻使用者中的心理计量学特性

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Aim: To assess the validity of two cannabis use severity scales among young cannabis users and to evaluate their ability to detect Substance Use Disorders (SUD). Participants: 241 volunteers (18-25. years), with a wide spectrum of cannabis use in the last 12. months. Measurements: The Cannabis Abuse Screening Test (CAST) and Severity of Dependence Scale (SDS) were self-administered. The Psychiatric Interview for Substance and Mental Disorders (PRISM) was used as gold standard for cannabis use disorders according to DSM-IV. Reliability and validity were assessed for two different CAST coding algorithms (b-binary and f-full) and for the SDS. In addition, the cannabis use diagnostic criteria contained in the PRISM were grouped to approximate forthcoming proposed DSM-V criteria to further evaluate these scales. Findings: 26.6% (95% CI: 21.0-32.2) of the subjects met criteria for cannabis dependence, and 49.0% (95% CI: 42.7-55.3) for cannabis use disorders. For both scales internal consistency (Cronbach's alpha > 0.71) and test-retest intraclass correlation coefficients (> 0.80) were good. The score 12 in the CAST-full discriminated better than others between presence and absence of dependence (27.0%; 95% CI: 21.4-32.6) while the score for discrimination of SUD was 9 (51.5%; 95% CI: 45.1-57.8). For the SDS the values were 7 (22.0%; 95% CI: 16.8-27.2) and 3 (64.7%; 95% CI: 58.7-70.8), respectively. According to proposed DSM-V criteria, for moderate and severe addiction the values for the CAST-f were 7 (68.5%; 95% CI: 62.5-74.3) and 12 (27%; 95% CI: 21.3-32.6) and for the SDS, 3 (65.0%; 95% CI: 58.7-70.8) and 7 (22%; 95% CI: 17.0-34.3), respectively. Conclusions: The CAST and SDS applied to young cannabis users are reliable and valid measures to detect cannabis use disorders when compared to both DSM-IV and proposed DSM-V criteria.
机译：目的：评估年轻大麻使用者中两种大麻使用严重性量表的有效性，并评估他们检测物质使用障碍（SUD）的能力。参与者：241名志愿者（18-25。岁），在最近的12个月中使用大麻的种类广泛。测量：大麻滥用筛查测试（CAST）和依赖性严重程度量表（SDS）是自我管理的。根据DSM-IV，精神和精神疾病面试（PRISM）被用作大麻使用障碍的黄金标准。评估了两种不同的CAST编码算法（b-binary和f-full）和SDS的可靠性和有效性。此外，将PRISM中包含的大麻使用诊断标准分组，以近似即将提出的DSM-V标准，以进一步评估这些标准。调查结果：26.6％（95％CI：21.0-32.2）的受试者符合大麻依赖标准，而49.0％（95％CI：42.7-55.3）符合大麻使用失调标准。对于两个量表，内部一致性（Cronbach's alpha> 0.71）和重测组内相关系数（> 0.80）都很好。在CAST完全评分中，有或没有依赖性的得分为12（27.0％; 95％CI：21.4-32.6），而对SUD的歧视得分为9（51.5％; 95％CI：45.1-57.8） ）。对于SDS，值分别为7（22.0％; 95％CI：16.8-27.2）和3（64.7％; 95％CI：58.7-70.8）。根据拟议的DSM-V标准，对于中度和重度成瘾，CAST-f的值分别为7（68.5％; 95％CI：62.5-74.3）和12（27％; 95％CI：21.3-32.6）， SDS分别为3（65.0％; 95％CI：58.7-70.8）和7（22％; 95％CI：17.0-34.3）。结论：与DSM-IV和拟议的DSM-V标准相比，应用于年轻大麻使用者的CAST和SDS是检测大麻使用失调的可靠且有效的措施。

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