Measures:
Medical records
1. Demographic info and computerized assessment battery
2. Alcohol and drug questions included substance type (cannabis, cocaine, amphetamine-type stimulants, hallucinogens, inhalants, sedatives, opioids, heroin or methadone, alcohol, tobacco
3. 30 time period to see the amount of use
4. Alcohol questions: Usual drinking frequency, typical number of standard drinks consumed, and frequency of hazardous drinking
5. The alcohol readiness rule and cannabis readiness ruler are 10-point scales developed in prior MI studies to measure readiness to change.

California Baptist University

Participants: 
1. People who are 18+ and looking for outpatient services in the Langley Porter Hospital and Clinics (LPPHC) at the University of California, San Francisco (UCSF) Medical Center.
2. Patients are referred by their insurance carrier, self-referred, or referred by the providers in their community. 
3. The study was conducted in the Adult Psychiatric Clinic and Partial Hospitalization Program, two LPPHC programs. 
4. The APC focuses on evaluation, psychotherapy, and medication management for patients with a range of mental health problems.
5. PHP: more intensive outpatient service where patients attend individual and group treatment for 5 hours daily for ten weeks.

Usual depression care:
1. All study participants received usual depression care based on current best practices for medication management and empirically supported forms of individual and group psychotherapy.
2. Treatment decisions were made collaboratively by clinicians and patients.
3. Selective serotonin reuptake inhibitors (SSRIs) were usually the medication of first choice in the clinic based on standards of care for depression.

Materials and Methods of MI study

Satre, D. D., Delucchi, K., Lichtmacher, J., Sterling, S. A., Weisner, C. (2013). 
Motivational interviewing to reduce hazardous drinking and drug use among depression patients, Journal of Substance Abuse Treatment, Volume 44, Issue 3, 2013, Pages 323-329, ISSN 0740-5472, https://doi.org/10.1016/j.jsat.2012.08.008

References for Motivational interviewing to reduce hazardous drinking and drug use among depression patients

1. Intervention session of MI 
2. 2 15-minute telephone sessions 
3. The control group got brochures on substance use and risks specific to the substances they reported
4. 20-minute follow-up interviews during month 3 and 6

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