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Table 2 Summary of key measures

From: Using smartphones to decrease substance use via self-monitoring and recovery support: study protocol for a randomized control trial

Outcome Instrument Frequency
Primary outcome (condensed hypothesis)
 Days of abstinence (greater abstinence among those with EMA, EMI, and EMA + EMI) Self-report of any alcohol or drug use in last 90 days collected through Global Appraisal of Individual Needs Version 3 (GAIN-Q3) [53]. Baseline and 3 and 6 months after enrollment
On-site urine drug screens for alcohol, amphetamine/methamphetamine, cannabis, cocaine/benzoylecgonine, and opiates/morphine Baseline, twice in month 1, and 3 and 6 months after enrollment
Secondary outcomes
 HIV risk behaviors (fewer risk behaviors among those with EMA, EMI, and EMA + EMI) Self-report of any risk behaviors (needle use, needle sharing, unprotected sex, multiple sexual partners, trading sex for drugs, victimization) in past 90 days collected through GAIN-Q3 Baseline and 3 and 6 months after enrollment
Other outcomes
 EMA and EMI use Computer logs of EMA responses and EMI use (pages, minutes, interventions, engagement, patterns, comments, and so on) Continuous
  1. EMA Ecological Momentary Assessment, EMI Ecological Momentary Intervention