| Inclusion criteria | Exclusion criteria |
---|---|---|
Population | People using illicit drugs (all modes of administration) | Studies on alcohol and tobacco or other legal substances Studies with family members of drug users |
People living in Afghanistan, Myanmar, Colombia | Studies of citizens from all other countries | |
Afghan, Myanmar, or Colombian citizens who have settled in other LMIC countries | Studies in high-income countries Studies with Afghan, Myanmar, or Colombian citizens in LMICs that do not distinguish between them and host populations | |
Comparison | Factors associated with health outcomes specifically among people using drugs, including access to any type of health or social support services | Studies that do not examine factors influencing health outcomes Studies that do not provide statistical tests of significance for factors associated with health outcomes |
Outcome | Any health outcome among people using illicit drugs | Studies on use of alcohol, tobacco and other legal substances Studies of health outcomes among general populations |
Study type | Primary quantitative studies English or Spanish languages Studies published from 2000 onwards | Qualitative studies Quantitative studies not providing statistical tests of significance for factors associated with health outcomes Policy studies Reviews, case reports, editorial, commentaries Not in English or Spanish Published before 2000 |