author | Drug used by participants | Sample size | year | country | design | Quality of the evidence |
---|---|---|---|---|---|---|
Morio et al. [27] | Methamphetamine users | 18 | 2008 | USA | Case-control | High |
Shetty et al. [54] | Methamphetamine users | 571 | 2016 | USA | Case-control | High |
Rommel et al. [55] | Methamphetamine users | 200 | 2016 | Germany | Case-control | High |
Thomson et al. [53]. | Cannabis users | 1015 | 2008 | New Zealand | Cohort | High |
Nives Protrka et al. [24] | Heroin users | 200 | 2013 | Croatia | Case-control | Moderate |
Rooban et al. [48] | Heroin and Cannabis users | 100 | 2008 | India | Cross-section | Moderate |
Reece [49] | Opiate users | 233 | 2007 | Australia | Cross-section | High |
Kayal et al. [50] | Amphetamines | 57 | 2014 | Saudi Arabia | Cross-section | Moderate |
D’Amore et al. [51] | Opioid and Marijuana users | 563 | 2011 | USA | Cross-section | High |
Gupta et al. [52] | illicit drug users | 126 | 2012 | India | Cross-section | Moderate |