Association of hospital-based substance use supports on emergency department revisits: a retrospective cohort study in Sudbury, Canada from 2018 to 2022

Table 4 Cox proportional hazards model with random-effects for 30-day readmission

Variable	Hazard ratio	LowerCI	UpperCI	p value
AMCS (ED)	0.58	− 0.76	− 0.32	< 0.01
AMCS (hospitalization)	1.19	− 0.07	0.42	0.17
Admit/no service	0.60	− 0.62	− 0.40	< 0.01
AMU	0.83	− 0.38	0.00	0.055
Gender (male)	1.17	0.00	0.31	0.049
Age (year)	0.99	− 0.01	− 0.00	0.012
Homeless	0.98	− 0.13	0.10	0.8
Opioid ED visit or hospitalization	1.00	− 0.12	0.13	0.96
Alcohol ED visit or hospitalization	0.98	− 0.11	0.07	0.68
Random effects (within patient)	Standard deviation	Variance
	1.13	1.28

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

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