| Socio-demographic characteristics |
| Age | 44.7 ± 8.7 |
| Women | 14 (46.7) |
| Any Indigenous vs. Non-Indigenous ancestry a | 7 (23.3) |
| Any non-stable housing in prior 3 years vs. none | 19 (63.3) |
| Any street housing in prior 3 years vs. none | 6 (20.00) |
| Education |
| Less than high-school certificate | 10 (33.3) |
| High school certificate | 7 (23.3) |
| High school certificate and higher (e.g., trades, university) | 13 (43.3) |
| Health status |
| Physical health score b | 13.8 ± 8.0 |
| Psychological health score b | 9.5 ± 8.0 |
| Health related quality of life score c | 0.8 ± 0.2 |
| Susbstance use and substance use treatment history |
| Lifetime years heroin injection | 14.5 ± 8.6 |
| Times ever attempted medication assisted treatment with oral methadone | 4.2 ± 2.6 |
| Highest daily dose of oral methadone in mgs d | 106.7 ± 51.9 |
| Ever enrolled in outpatient withdrawal | 28 (93.3) |
| Ever in outpatient counseling | 23 (76.7) |
| Ever enrolled in residential treatment | 17 (56.7) |