Addiction Severity Index
The Addiction Severity Index (ASI) is one of the most widely used tools for the assessment of substance use related problems in adults. Professionals all over the world use the ASI to get a better understanding of their client's treatment needs and outcomes. It is the most widely used substance abuse severity, treatment planning, and outcome measurement instrument in the United States.
The ASI was developed to serve as a standardized and reliable instrument for evaluating adults seeking treatment for substance abuse problems and is used frequently in a host of clinical, adult justice, and research settings. The semi-structured interview was designed to address seven potential problem areas in substance abusing clients:
Clients are asked to respond to specific questions about the problems they have experienced, both within the past 30 days and over their lifetimes. Thus, the ASI identifies both urgent and chronic concerns. The ASI provides two scores: severity ratings and composite scores. Severity ratings are subjective ratings of the client's need for treatment, derived by the interviewer. The severity rating scales range from 0 (no treatment necessary) to 9 (treatment needed to intervene in life-threatening situation). Composite scores are measures of problem severity during the prior 30 days.
The ASI consists of approximately 200 items and is administered by a trained interviewer during a client interview. Assessments.com offers online versions of the ASI appropriate for initial and follow-up assessments. The initial online assessment takes approximately 45 minutes to complete and a follow-up assessment takes about 25 to 30 minutes to complete.
Notes: by McLellan, A.T., Kushner, H., Metzger, D., Peters, R., et al. (1992); National Institute on Drug Abuse