The influence of poly-drug use patterns on the association between opioid agonist treatment engagement and injecting initiation assistance

Table 2 Multivariable logistic regression models assessing the association between assisting others in their first injection and OAT engagement in Vancouver, Canada

Variable	AOR	(95% CI)	P-value
1. High Frequency Methamphetamine IDU; Low to Moderate NIDU^a (n = 162)
OAT engagement^a	0.34	(0.07–1.60)	0.173
Age	0.97	(0.92–1.02)	0.224
Male sex	4.64	(0.99–21.65)	0.051
2. Moderate-to-High Frequency Heroin IDU; High Frequency Heroin NIDU; Moderate-to-High Frequency Methamphetamine IDU and NIDU^a (n = 127)
OAT engagement^a	2.04	(0.64–6.49)	0.230
Age	0.94	(0.87–1.01)	0.094
Male sex	0.64	(0.21–1.93)	0.427
3. Low Frequency Use of All Drugs^a (n = 295)
OAT engagement^a	1.71	(0.29–10.26)	0.557
Age	0.91	(0.84–0.98)	0.014
Male sex	1.25	(0.21–7.40)	0.808
4. High Frequency Heroin IDU and Methamphetamine IDU; Low-to-Moderate Frequency PO IDU and Methamphetamine NIDU^a (n = 199)
OAT engagement^a	0.18	(0.05–0.63)	0.008
Age	0.96	(0.91–1.01)	0.105
Male sex	1.89	(0.68–5.23)	0.222
5. High Frequency Heroin IDU^a (n = 279)
OAT engagement^a	0.46	(0.16–1.32)	0.148
Age	0.93	(0.89–0.98)	0.003
Male sex	1.37	(0.47–3.95)	0.565
6. High Frequency Cocaine IDU; Low-to-Moderate Heroin IDU^a (n = 153)
OAT engagement^a	1.02	(0.22–4.79)	0.978
Age	0.90	(0.83–0.97)	0.005
Male sex	0.42	(0.08–2.16)	0.299

^aThe variable refers to activities during the previous six months
AOR Adjusted Odds Ratio, 95% CI 95% Confidence Interval, IDU Injection Drug Use, NIDU Non-Injection Drug Use, OAT Opioid Agonist Treatment

ISSN: 1747-597X