Ontario Hospital Records Reveal Marked Increase in Gambling Disorder Emergency Visits Among Males Following Online Market Launch

University of Toronto and ICES researchers examined 14 years of hospital records across Ontario and identified clear shifts in emergency department visits tied to gambling disorders once the province opened its online gambling market, and the patterns stood out most sharply among males in specific age groups while remaining unchanged among females.

The study tracked expected versus actual visit rates before and after the regulatory change, which allowed private operators into the space, and the data showed emergency visits for gambling disorders climbing 154% above expected levels among males aged 10-29 as well as 116% above expected levels among men aged 30-44, with the increases concentrated in the period after online access expanded.

Study Design and Data Scope

Analysts drew from comprehensive provincial hospital databases spanning more than a decade, which permitted comparison of pre-launch trends against post-launch outcomes, and this long timeframe helped isolate the timing of the market opening as a key variable in the observed changes.

Researchers focused on emergency department encounters coded for gambling disorder, applied statistical modeling to establish baseline expectations, and then measured deviations once online platforms became available to Ontario residents, and the methodology emphasized age and sex stratification to detect differential impacts across demographic segments.

Key Findings by Demographic Group

Males in the younger cohort experienced the largest deviation from projected visit rates, registering the 154% excess mentioned earlier, while men between 30 and 44 showed a 116% excess, yet female visit rates stayed within expected ranges throughout the same interval, and these contrasts emerged consistently across the dataset.

The absence of change among females contrasted with the pronounced rises among males, which prompted the authors to note the sex-specific nature of the signal, and the findings pointed to online gambling availability as a factor that aligned temporally with the documented increases in male presentations.

Context for Other Jurisdictions

Authors of the analysis described the Ontario results as a cautionary signal for regions such as Alberta that are weighing similar moves toward private online operators, and they underscored the value of monitoring hospital data in real time when new gambling channels open.

The report referenced the 14-year hospital record review as evidence that certain demographic groups may respond differently to expanded online access, and it encouraged policymakers elsewhere to consider age-stratified and sex-stratified surveillance when evaluating regulatory proposals.

Implications for Public Health Monitoring

Public health officials in Ontario now have additional data points to inform ongoing oversight of gambling-related harms, while the University of Toronto and ICES collaboration demonstrated how existing hospital datasets can surface early indicators of behavioral health shifts tied to policy changes.

Because the increases appeared only after the market opened and followed distinct demographic lines, the study supplied a template for other provinces to adapt when tracking comparable developments, and the authors stressed the utility of longitudinal record analysis in identifying patterns that might otherwise remain hidden.

Conclusion

The University of Toronto and ICES examination of 14 years of Ontario hospital records documented elevated emergency visits for gambling disorders among males aged 10-29 and 30-44 after the online gambling market launched, with no parallel movement among females, and the authors positioned these outcomes as relevant information for jurisdictions evaluating comparable regulatory shifts. Data from the study, referenced through sources such as igaming-times.com, continues to inform discussions around monitoring and prevention strategies in expanding online gambling environments.