Which screening instrument is most frequently used for substance use assessment?

The most frequently used screening instrument for substance use assessment is the CAGE questionnaire. This tool is a simple, four-item screening test that evaluates potential alcohol problems based on key behavioral indicators. The CAGE is effective because it is quick to administer and provides valuable insights into a person's relationship with alcohol. It focuses on both the consequences of drinking behaviors and the patient’s self-perception regarding alcohol use.

In contrast, while the Michigan Alcoholism Screening Test, the Substance Abuse Subtle Screening Inventory-4, and the Supplemental Addiction Measure Scale are all valuable tools in their own right, they may not have the same level of widespread use in routine assessments as CAGE. The CAGE's brevity and effectiveness make it a go-to choice for many clinicians in both medical and counseling settings, contributing to its popularity across various healthcare environments.