W-SUDs for COVID-19

Change in number of substance use occasions in the past 30 days from Baseline to Post-treatment at 8 weeks

Measure of substance use problems. The SIP-AD assesses substance use problems in the past 30 days. Total score consists of of the sum of all 15 items, ranging from 0-45, where greater scores indicate greater substance use problems.

Measure of drug abuse related consequences. The DAST-10 is a brief, 10-item self-report measure that assesses consequences related to drug abuse, excluding alcohol and tobacco. The range is 0-10, where higher scores indicate greater severity. Adapted from past 12 months to past 30 days.

Measure of self-confidence. The 8-item BSCQ is a state dependent measure that assesses self-confidence to resist the urge to drink heavily or use drugs in a variety of situations. Each of the 8 scale situations consists of a 100-mm line, anchored by 0% ("not at all confident") and 100% ("totally confident") where clients are asked to indicate confidence on a scale from 0% to 100%. Higher scores are associated with greater confidence.

A one-item, self-reported rating of craving intensity to use substances over the past 7 days. Score ranges is from 0-4, where a greater score indicates a more intense urge to use.

A one item, self-reported rating of pain. Scores range from 0-100 where higher scores indicate greater levels of pain.

Measure of depression. An 8-item self-report questionnaire that assesses the frequency and severity of depression symptoms. Total scores range from 0 to 24 where higher scores indicate greater levels of depression.

Measure of anxiety. A 7-item brief self-report measure used to assess the frequency and severity of anxious thoughts and behaviors over the past 2 weeks. Total score between 0-21, where higher scores indicate greater levels of anxiety.

Assesses impact of the COVID-19 pandemic in terms of exposure to stressors, mental health impact, and growth. Possible total score range from 0-22, where greater scores are related to greater impact.

Measure of satisfaction. An 8-item measure used to assess client's satisfaction with treatment on a 4-point scale. Example questions include, "How would you rate the quality of service you received"? and "Did you get the kind of service you wanted?" Total sums range from 8-32, with high scores indicating greater satisfaction with the W-SUDs mobile application.

Measure of acceptability. A 6-item subscale that inquires about intervention acceptability. Total scores range from 6-36, where greater scores indicate greater intervention acceptability.

Measure of feasibility. A 6-item subscale that inquires about factors that impact treatment usage (i.e., intervention quality). Total scores range from 6-36, where greater scores indicate greater intervention feasibility.

Measure of working alliance. A measure of therapeutic alliance that assesses three key aspects of the therapeutic alliance: (a) agreement on the tasks of therapy, (b) agreement on the goals of therapy and (c) development of an affective bond. Total scores range from 12-60, with higher scores indicating greater alliance. The present study utilized the validated 12-item Short-Revised version (WAI-SR) with minor changes to language, replacing "therapist" with "Woebot".