Table 2 Summary of key measures
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 6Â 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 |