Alexander Dale
Graduate School of Social Work, University of Houston, Houston, Texas 77204-4013, USA.
Am J Drug Alcohol Abuse. 2003 Aug;29(3):619-46. doi: 10.1081/ada-120023462.
Marijuana use prevalence, culturally confusing messages about marijuana risks, assessment dilemmas, and current screening inadequacies justify developing a marijuana specific screening inventory for assessment purposes. This article describes the Marijuana Screening Inventory (MSI-X) and its preliminary psychometric reliability, factor analyses, and factor structure.
The MSI-X was administered to a community sample of 420 Army reservists participating in substance abuse educational classes. Participants responded anonymously to the 39-item MSI-X. SPSS analyses were performed with 408 returned MSI-Xs from a sample of 49% males and 40% females.
Analyses revealed 61% smoked marijuana during their lifetime. Reliability of the MSI-X was .89. Exploratory factor analyses of 31 scored items by principal components and varimax rotation supported a nine-factor structure, explaining 65.8% of the variance, with all items loading > or = .30. Within the sample, 7.84% scored > or = 7 suggesting "at risk" with marijuana; 6.12% scored 4 to 6 "suggestive of risk"; 20.83% scored 1 to 3 reflecting "normal or experimental" use; and 65.4% scored 0 suggesting "no problem."
The reliability, variance explained, factor-loading matrix of the nine-factor MSI-X structure and clinically predetermined scoring ranges appear useful for screening marijuana use patterns. Factor-based subscales were derived from the factor-loading matrix and described as a base for future confirmatory factor analysis. Although the MSI-X version needs psychometric strengthening, it shows potential as a marijuana-specific screening inventory for use in general mental health and primary care settings.
大麻使用的流行率、关于大麻风险的文化上令人困惑的信息、评估困境以及当前筛查的不足，都证明有必要开发一种专门用于评估目的的大麻筛查量表。本文描述了大麻筛查量表（MSI-X）及其初步的心理测量可靠性、因子分析和因子结构。
对参加药物滥用教育课程的420名陆军预备役人员的社区样本进行了MSI-X量表测试。参与者对包含39个条目的MSI-X量表进行匿名回答。对从49%为男性和40%为女性的样本中回收的408份MSI-X量表进行了SPSS分析。
分析显示，61%的人一生中吸食过大麻。MSI-X量表的可靠性为0.89。通过主成分分析和方差最大化旋转对31个计分项目进行探索性因子分析，支持九因子结构，解释了65.8%的方差，所有项目的载荷≥0.30。在样本中，7.84%的人得分≥7，表明大麻使用“有风险”；6.12%的人得分4至6，“提示有风险”；20.83%的人得分1至3，反映“正常或尝试性”使用；65.4%的人得分0，表明“无问题”。
九因子MSI-X结构的可靠性、解释的方差、因子载荷矩阵以及临床预先确定的计分范围似乎对筛查大麻使用模式很有用。基于因子的分量表是从因子载荷矩阵中得出的，并被描述为未来验证性因子分析的基础。虽然MSI-X版本需要加强心理测量，但它显示出作为一种专门用于大麻筛查的量表在一般心理健康和初级保健环境中使用的潜力。
