Table 2.

Individual logistic regression models for buprenorphine treatment retention at 3- and 12-months (N = 294).

Predictor	Month-3 retention			Month-12 retention
	OR	95% CI	p	OR	95% CI	P
Emerging adult (compared to older adult)	0.37	[0.21–0.66]	< 0.001*	0.25	[0.13–0.50]	< 0.001*
Demographics
Female (compared to male)	1.22	[0.72–2.07]	0.458	1.20	[0.75–1.93]	0.450
Caucasian	0.74	[0.27–2.06]	0.565	0.45	[0.19–1.06]	0.069†
No. of days worked in past 30 days	1.02	[0.98–1.05]	0.394	1.01	[0.98–1.04]	0.576
Currently receiving disability income	1.48	[0.77–2.86]	0.241	1.71	[0.98–2.97]	0.058†
Past-year history of psychiatric medication	1.61	[0.94–2.76]	0.082†	1.09	[0.65–1.80]	0.750
Recent substance use patterns
Self-reported use in past 30 days
Alcohol	2.29	[0.92–5.68]	0.075†	0.96	[0.48–1.90]	0.896
Cannabis	0.70	[0.33–1.48]	0.352	0.42	[0.18–0.95]	0.037*
Cocaine	0.89	[0.39–2.02]	0.774	0.52	[0.23–1.21]	0.132
No other substance use	1.11	[0.65–1.89]	0.699	2.18	[1.35–3.53]	0.002*
Urine toxicology screening at intake
Alcohol	1.21	[0.38–3.82]	0.749	1.13	[0.42–3.06]	0.811
Cannabis	0.61	[0.35–1.06]	0.082†	0.38	[0.21–0.68]	0.001*
Cocaine	0.39	[0.21–0.73]	0.003*	0.51	[0.26–1.00]	0.050†
Amphetamine	1.31	[0.42–4.09]	0.647	2.10	[0.80–5.49]	0.130
Benzodiazepine	0.79	[0.45–1.38]	0.404	0.87	[0.48–1.36]	0.421
Opioid dependence severity
No. of previous detoxification visits	1.02	[0.89–1.16]	0.786	1.09	[0.97–1.23]	0.154
Lifetime heroin use	0.48	[0.24–0.98]	0.043*	0.44	[0.25–0.77]	0.004*
Heroin use in the past 30 days	0.73	[0.39–1.40]	0.346	0.41	[0.20–0.81]	0.011*
History of injection drug use	0.44	[0.25–0.76]	0.004*	0.49	[0.30–0.79]	0.003*
Opioid dependence experience
Started during adolescence (< 18 years)	0.65	[0.38–1.11]	0.116	0.53	[0.31–0.91]	0.021*
Total years of opioid use	1.03	[1.00–1.06]	0.087†	1.03	[1.01–1.06]	0.009*
Short duration of opioid use (< 2 years)	0.27	[0.06–1.21]	0.087†	0.26	[0.03–2.19]	0.215

Note: Each row represents an individual logistic regression model.

^*p < 0.05.

^†p < 0.10.