Table 3.

Logistic regression odds ratios for retention in buprenorphine treatment at 3 months (n = 294).

Predictor	Model 0		Model 1		Model 2		Model 3		Model 4
	OR	95% CI	OR	95% CI	OR	95% CI	OR	95% CI	OR	95% CI
Emerging Adult (compared 10 older adult)	0.37	[0.21–0.66]*	0.39	[0.22–0.70]*	0.36	[0.20–0.66]*	0.41	[0.22–0.75]*	0.44	[0.22–0.89]*
Demographics
Past-year history of psychiatric medication			1.41	[0.81–2.45]	1.36	[0.77–2.39]	1.44	[0.81–2.56]	1.44	[0.81–2.56]
Recent substance use patterns
Self-reported use in past 30 days
Alcohol					2.32	[0.91–5.92]†	2.46	[0.95–6.34]†	2.36	[0.91–6.10]†
Urine toxicology screening at intake
Cannabis					0.75	[0.42–1.35]	0.73	[0.40–1.32]	0.70	[0.39–1.29]
Cocaine					0.38	[0.20–0.74] *	0.42	[0.22–0.81]*	0.42	[0.21–0.81]*
Opioid dependence severity
Lifetime heroin use							0.81	[0.33–2.00]	0.83	[0.33–2.07]
History of injection drug use							0.52	[0.25–1.04]†	0.42	[0.25–1.03]†
Opioid dependence experience
Total years of opioid use									1.00	[0.96–1.03]
Short duration of opioid use (< 2 years)									0.38	[0.07–1.99]

^*p < 0.05.

^†p < 0.10.