Table 5.

Cox proportional hazards model for first re-admission

Variable	Hazard ratio	LowerCI	UpperCI	p value
AMCS (ED)	0.45	0.36	0.55	< 0.01
AMCS (hospitalization)	1.02	0.82	1.28	0.86
Admit/no service	0.39	0.35	0.43	< 0.01
AMU	0.80	0.67	0.95	0.01
Gender (male)	1.44	1.31	1.58	< 0.01
Age (year)	1.00	1.00	1.01	0.02
Homeless	0.96	0.86	1.08	0.51
Alcohol ED visit or hospitalization	1.05	0.96	1.15	0.26
Opioid ED visit or hospitalization	1.01	0.90	1.14	0.87

ED emergency department, AMCS (hospitalization) Addiction medicine consult service during hospital admission, AMU Addiction medicine unit, CI confidence interval