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Study: Online Sports Betting Linked to Dramatic Rise in Emergency Room Visits — A Deeper Look

By jili tutorial · October 7, 2026

Study: Online Sports Betting Linked to Dramatic Rise in Emergency Room Visits — A Deeper Look

Overview: What the New Ontario Research Reveals

The legalization of online sports betting in Ontario, Canada, has been directly tied to a sharp increase in severe gambling-related health emergencies. A comprehensive study published in the American Journal of Preventive Medicine by public health researchers at the University of Toronto analyzed emergency-room (ER) data from January 2012 through June 2025. The findings paint a stark picture: ER visits for gambling disorders rose steadily — about 7% per quarter — and by mid-2025, visits were 99% above the level that would have been expected without legalized online gambling.

This is not a small uptick. It is a sustained, accelerating trend that continued through the entire study period, concentrated in specific age groups and genders. And these were not mild cases: nearly one-third of the ER visits resulted in hospitalization.

Key Findings from the Ontario Study

Steady Quarterly Increases

The research tracked ER visits before and after the April 2022 launch of Ontario’s regulated private online gambling market. After controlling for other factors, the researchers found that each quarter brought an approximate 7% increase in gambling-disorder-related ER visits. The rise built slowly but steadily, then surged.

ER Visit Rates by Demographic Group

The study compared actual observed ER visits with the number that would have been expected if online gambling had not been legalized. By the second quarter of 2025 (April–June), the differences were stark:

These three groups — young males and men in early-to-mid adulthood — experienced the most dramatic increases. The data suggests that online gambling operators are specifically targeting this demographic, and the harms are landing squarely on them.

Severity: Nearly One-Third Hospitalized

One of the most troubling findings is that these ER visits were not for mild issues. Approximately 30% of the patients who arrived at emergency rooms with a gambling disorder required admission to the hospital. This indicates that the problems had escalated to a level of acute medical or psychiatric crisis.

How Online Gambling Acts as an “Accelerant”

Co-Occurring Conditions

More than 70% of the gambling-disorder ER visits involved another mental health condition or heavy substance use. Gambling disorder was listed either as the primary reason for the visit or as a contributing factor. This pattern suggests that online gambling does not exist in isolation — it often interacts with underlying mental health struggles, alcohol or drug use, and other risk factors.

The Gap Between Visible and Hidden Harms

Ryan Forrest, a public-health doctoral student at the University of Toronto and co-author of the study, noted that ER data captures only the most extreme cases. “This rise in severe presentations might be a bit of a warning signal of a wider increase in harms across the general population,” he told Time magazine. The ER numbers are the tip of the iceberg. They do not account for the far more common but less visible consequences: financial ruin, relationship breakdowns, job loss, chronic stress, and worsening anxiety or depression.

Broader Health System Impact: The Helpline Evidence

A companion study published in the Canadian Medical Association Journal examined contacts to ConnexOntario, the province’s 24-hour mental-health and addictions helpline. The findings mirrored the ER data:

“These two data sources are telling us there is a real health signal happening here,” Forrest said. The consistency between ER visits and helpline contacts strengthens the conclusion that legalization has triggered a measurable spike in severe harm.

Why This Matters for the United States

A Rapidly Expanding Market

The findings arrive as a warning for the U.S., where the landscape is shifting rapidly. Since the Supreme Court struck down the federal ban on state-authorized sports wagering in 2018, more than 30 states — including New Jersey, Tennessee, New York, Pennsylvania, and Arizona — have legalized sports betting. Many of these states also allow online casino gambling, creating a 24/7 pipeline of high-speed wagering accessible from any smartphone.

Unique Risks of Online Gambling

Public-health experts have long cautioned that online gambling carries distinct dangers compared to in-person betting:

Ontario’s data now provides some of the clearest evidence yet that legalization can produce immediate, measurable spikes in severe gambling-related harm. The U.S. is essentially running the same experiment, state by state, without the benefit of learning from Ontario’s experience in real time.

Regulatory Recommendations: What Ontario’s Findings Suggest

Forrest and his colleagues argue that the study results should push regulators to adopt stronger guardrails. They propose several concrete measures:

1. Advertising Limits

Restrict the volume and content of gambling ads, especially those targeting young men and teenagers. Aggressive promotions — including “risk-free” bets that critics say are anything but — normalize gambling and drive participation.

2. Mandatory Spending Caps

Require online platforms to enforce deposit and loss limits, with no option for users to override them through repeated requests. This would act as a structural barrier to runaway spending.

3. Integration with Mental-Health Services

Build direct links between gambling platforms and helplines, self-exclusion programs, and crisis services. When a user shows signs of problem gambling (e.g., rapid losses, late-night sessions), the platform could trigger a pause or offer a connection to support resources.

4. Real-Time Data Sharing

Require operators to share anonymized behavioral data with public-health agencies so researchers can detect emerging trends before they escalate into ER crises.

As Forrest warned, “Emergency rooms are only the beginning.” Without proactive regulation, the pattern seen in Ontario may repeat across North America, with growing numbers of people landing in hospitals — and far more suffering in silence.