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Table 1 Instruments, instrument-related procedures, and primary outcome measures

From: Testing the effectiveness of a motivational interviewing-based brief intervention for substance use as an adjunct to usual care in community-based AIDS service organizations: study protocol for a multisite randomized controlled trial

Instruments (time; compensation) Collection time-points and procedures Primary outcome measures
Enrollment (pre-baseline) Baseline (t = 0 weeks) Follow-up (t = 4 weeks)
Substance Use Screener (1–5 min; $0) Xa,b    
Project Introduction Script (1–2 min; $0) Xa,b    
Informed Consent (5–10 min; $0) Xa,b    
Assurance of Consent (1–2 min; $0) Xa,b    
Locator Form (5–10 min; $0)   Xb   
Baseline Assessment (20–40 min; $20)   Xb   Baseline measurement of each primary outcome was completed as part of the baseline assessment, which was adapted from the Addiction Severity Index, 5th Edition. [37] Descriptions of the primary outcome measures are provided below
Follow-up Assessment (20–40 min; $20)    Xc Days of primary substance use
A continuous measure (ranges from 0 to28) of the number of days participants used their primary substance during the past 28 days
Number of substance-related problems
A continuous measure (ranges from 0 to 11) of the number of substance use disorder symptoms participants had during the past 28 days
Times engaging in risky behaviors
A continuous measure (no specified range) of the number of times participants engaged in unprotected sex, injection drug use, or needle sharing during the past 28 days
Days of substance use treatment
A continuous measure (ranges from 0 to 28) of the number of days participants attended residential treatment, outpatient treatment, or self-help group meetings during the past 28 days
Antiretroviral therapy (ART) medication adherence
A continuous measure (ranges from 0 to 28) of the number of days participants missed at least one dose of their HIV medications during the past 28 days
  1. aScreening and recruitment staff trained to complete; b brief intervention (BI) staff trained to complete; c condition blinded research staff trained to complete