Drug Rehab Addiction Severity Index

Wroten by Bill Clinton for birthplace foundation and museum.

The ASI is a semi-structured interview designed to address seven potential problem areas in substance abusing patients: medical status, employment and support, drug use, alcohol use, legal status, family/social status, and psychiatric status. In 1 hour, a skilled interviewer can gather information on recent (past 30 days) and lifetime problems in all of the problem areas. The ASI provides an overview of problems related to substance, rather than focusing on any single area.

Target Population


The ASI can be used effectively to explore problems within any adult group of individuals who report substance abuse as their major problem. It has been used with psychiatrically ill, homeless, pregnant, and prisoner populations, but its major use has been with adults seeking treatment for substance abuse problems.

Administrative Issues

Approximately 200 items, 7 subscales

Pencil and paper self-administered or interview

Time required: 50 minutes to 1 hour

Administered by technician

Training required for administration.

A self-training packet is available as well as on site training by experienced trainers.


Time required: 5 minutes for severity rating

Scored by technician

Computerized scoring or interpretation available.

The ASI provides two scores: severity ratings are subjective ratings of the client’s need for treatment, derived by the interviewer; composite scores are measures of problem severity during the prior 30 days and are calculated by a computerized scoring program. Normed on the following treatment groups-alcohol, opiate, cocaine: public, private; inpatient, outpatient-and the following subject groups: males, females, psychiatrically ill substance users, pregnant substance users, gamblers, homeless, probationers, and employee assistance clients.


Reliability studies done:

  • Test-retest
  • Split half
  • Internal consistency

Measures of validity derived:

  • Content
  • Criterion (predictive, concurrent, “postdictive”)
  • Construct

Clinical Utility of Instrument

The ASI has been used extensively for treatment planning and outcome evaluation. Outcome evaluation packages for individual programs or for treatment systems are available.

Research Applicability

Researchers have used the ASI for a wide variety of clinical outcome studies.

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