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Conditional prevalence of past-6-month overdose by heroin–methamphetamine co-injection use and study cohort (n = 1,294)
| Co-injected (n = 522) |
Did not co-inject (n = 772) |
|||
| Past-6-month overdose | San Diego (n = 111) | Tijuana (n = 411) | San Diego (n = 448) | Tijuana (n = 324) |
| n | 18 | 48 | 23 | 26 |
| % | 16.2% | 11.7% | 4.9% | 8.0% |
