University of Toronto Analysis Shows Doubling of Gambling Disorder Emergency Visits Following Sports Betting Legalization

University of Toronto researchers released findings that documented a near doubling of emergency department visits related to gambling disorders across Ontario after the 2021 legalization of single-event sports betting and the subsequent 2022 expansion of the province's regulated online gambling market to private operators, and the data covered 14 years of records for residents aged 10 to 105 while highlighting particularly sharp increases among young males that reached as high as 154 percent above expected levels.

Most of those visits involved co-occurring mental health conditions or substance use issues, and researchers noted that the encounters frequently resulted in hospital admissions rather than outpatient discharge, which underscores the severity of cases that reached emergency care during the period of market growth.

Study Scope and Data Collection

The analysis drew on extensive administrative health records spanning more than a decade before the regulatory changes and continued through the years immediately following them, allowing the team to compare observed visit rates against historical trends and projected baselines while isolating the impact of expanded access to single-event sports betting and online platforms operated by private companies.

Researchers tracked demographic patterns within the dataset and found that younger males experienced the most pronounced surge, a result that aligns with industry marketing strategies that have focused promotional efforts on sports audiences in that age group since the legalization took effect.

Key Findings on Visit Increases and Comorbidities

Emergency department presentations for gambling disorders rose nearly twofold overall once the new betting options became available, and the elevation persisted even after adjustments for population growth and other factors, according to the published results, while the full study appears in the American Journal of Preventive Medicine at the linked source.

Co-occurring conditions appeared in the majority of cases, with mental health diagnoses and substance-related concerns frequently listed alongside the gambling disorder code, and this pattern contributed to higher rates of inpatient admission as clinicians determined that patients required further stabilization beyond the emergency setting.

Demographic Patterns and Targeted Marketing Context

Young males stood out in the statistics with visit rates climbing up to 154 percent higher than projections, and observers have connected this spike to the heavy advertising presence around sports events that followed the 2021 policy shift, whereas older age groups showed comparatively smaller deviations from expected volumes during the same timeframe.

The study authors examined age-stratified data and confirmed that the 10-to-105 range captured both adolescent and adult presentations, yet the concentration of increases remained in the younger male cohort, prompting further questions about exposure pathways through mobile apps and live sports integrations that became widely available after the 2022 market expansion.

Broader Health System Implications

Hospital admission rates following these visits indicated that many individuals arrived in acute distress requiring extended care, and the presence of additional mental health or substance issues often complicated immediate treatment plans while lengthening average stays compared with visits that involved gambling concerns alone.

Public health officials have begun reviewing the findings alongside existing harm-reduction measures, and the data provides a baseline for evaluating whether current responsible-gambling tools and age-verification protocols are sufficient to address the observed rise in severe cases that reach emergency departments.

Relevance in 2026 and Ongoing Monitoring

As of September 2026, the patterns identified in the University of Toronto study continue to inform regulatory discussions in Ontario, where policymakers examine whether additional safeguards could mitigate harms that emerged after the introduction of single-event sports betting and private online operators, and health agencies track emergency visit trends to determine if the initial doubling has stabilized or continued to climb in subsequent years.

Longitudinal follow-up remains essential because the 14-year dataset ended shortly after the market changes, leaving room for updated analyses that incorporate more recent administrative records and assess whether interventions implemented since 2022 have altered the trajectory of gambling-related emergency presentations.

Conclusion

The University of Toronto study supplies concrete evidence that emergency department visits for gambling disorders nearly doubled in Ontario following the 2021 and 2022 regulatory expansions, with the steepest increases concentrated among young males and accompanied by high rates of comorbid conditions that often led to hospital admission, and these documented trends supply health authorities with measurable indicators for ongoing evaluation of the province's expanded betting environment.