Hospital and physician-based mental healthcare during 12 months of opioid agonist treatment for opioid use disorder: Exploring costs and factors associated with acute care

Original research
by
Rosic, Tea et al

Release Date

2025

Geography

Canada

Language of Resource

English

Full Text Available

Yes

Open Access / OK to Reproduce

Yes

Peer Reviewed

Yes

Objective

This study aimed to determine the prevalence of non-substance use-related mental health emergency department (ED) visits, hospitalizations, and outpatient physician visits for individuals receiving treatment for opioid use disorder (OUD) over one year. 

Findings/Key points

Lower odds of ED use and hospitalization were associated with older age (46+ compared to less than 25) and being employed. Higher odds of ED use and hospitalization was associated with positive opioid urine drug screens, having more comorbid conditions (7+ health conditions compared to 0–2 health conditions), and receipt of outpatient mental healthcare were associated with higher odds of ED visits or hospitalizations. Healthcare costs were considerably higher for those receiving acute care treatment for mental health conditions as compared to outpatient care. 

Design/methods

Observational cohort data collected from 3,430 individuals receiving treatment for OUD in Ontario, Canada, was linked with health administrative records available for all individuals enrolled in Ontario’s public health insurance program. 

Keywords

Hospitals
Mental health
Opioids
Substitution/OAT