The Marijuana Screening Inventory (MSI-X): reliability, factor structure, and scoring criteria with a clinical sample.

Objective: This study continues the psychometric evaluation of a 31-item Marijuana Screening Inventory (MSI-X) with adults referred to a substance abuse clinic, by determining MSI-X reliability, factor structure, scoring cutoff accuracy, sensitivity, and specificity with a DSM-IV-TR criterion measure.

Method: A "marijuana inventory" containing demographic, MSI-X, and DSM IV-TR diagnostic items was administered to 107 adults undergoing substance-use evaluation.

Results: The MSI-X reliability was .