Motivational interviewing in drug abuse services: a randomized trial

Area of Science:

• Addiction Medicine
• Behavioral Psychology
• Clinical Trials

Background:

• Motivational interviewing (MI) is a client-centered approach to facilitate behavior change.
• It is often used to help individuals resolve ambivalence regarding substance use.
• Previous studies suggested MI's efficacy in addiction treatment.

Purpose of the Study:

• To evaluate the effectiveness of a single session of manual-guided motivational interviewing (MI).
• To determine if MI improves drug use outcomes when added to standard inpatient and outpatient addiction treatment.
• To assess the impact of MI on abstinence rates and overall drug use.

Main Methods:

• A randomized clinical trial involving 152 outpatients and 56 inpatients with drug problems.
• Participants were assigned to receive either a single session of MI or no MI.
• Drug use was monitored via self-report, urine toxicology, and collateral reports over 12 months.

Main Results:

• Motivational interviewing (MI) did not demonstrate a significant effect on drug use outcomes in either the inpatient or outpatient groups.
• Both the MI and control groups showed significant increases in abstinence from illicit drugs and alcohol.
• The addition of MI to existing treatment protocols did not yield superior results compared to standard care alone.

Conclusions:

• A single session of manual-guided MI was not effective in improving drug use outcomes for individuals in public addiction treatment agencies.
• Standard addiction treatments, without the addition of MI, were associated with substantial improvements in abstinence.
• Further research may be needed to explore the optimal delivery or specific patient populations for MI in addiction treatment.