Health Records Study Connects Sports Betting Expansion to Higher Gambling Disorder Rates

Researchers examined health records covering more than 197 million U.S. adults and documented a clear pattern where problem gambling diagnoses climbed more than 60 percent in states that had legalized sports betting while dropping 29 percent in states without such legalization and the contrast emerged after expanded access and advertising took hold in the legalized markets.

The analysis tracked diagnosis rates over time and found the sharpest rise occurred among adults aged 18 to 29 whose rates doubled yet the absolute numbers stayed low at 4.8 diagnoses per 100,000 people in legalized states compared with 2.2 per 100,000 in states that kept sports betting illegal and experts pointed to the data as direct evidence tying broader availability plus marketing to increased issues.

Scope of the Nationwide Records Review

Data came from a large-scale review that pulled together records from across multiple states allowing observers to compare trends before and after legalization decisions took effect and the scale of 197 million adults provided enough statistical power to detect shifts that smaller studies might have missed while the findings showed consistent movement in opposite directions depending on legal status.

States that introduced legal sports betting saw the upward trend accelerate once operators began widespread advertising and the availability of mobile apps made placement of bets easier than before and researchers noted that non-legalized states experienced the opposite movement with diagnoses falling steadily during the same period.

Breakdown of Diagnosis Increases by Age Group

Young adults between 18 and 29 experienced the most pronounced change with rates doubling in legalized states while older age brackets showed smaller though still noticeable rises and the overall picture indicated that expanded access reached this demographic more directly through digital platforms and targeted promotions.

Absolute rates remained modest even after the increases which meant the total number of new diagnoses per 100,000 stayed in single digits yet the percentage jump provided a measurable signal that public health officials could track over subsequent months and the pattern held across multiple states that had passed legalization measures around the same timeframe.

Regional Comparisons and Legal Status Effects

Legalized states posted the 4.8 per 100,000 figure while non-legalized states recorded 2.2 per 100,000 and the gap widened after advertising campaigns launched and mobile betting apps became widely available and the divergence offered a natural experiment that allowed direct comparison without needing additional variables to explain the direction of change.

Observers noted that states maintaining prohibitions saw continued declines in diagnoses which suggested that restricted access played a role in keeping rates lower and the data from the 197 million records reinforced the view that legalization created measurable upward pressure on problem gambling identification.

Evidence Linking Access, Advertising, and Health Outcomes

The study results indicated that expanded access together with advertising correlated with the rise in diagnoses and the timing aligned with rollout periods in multiple markets and researchers presented the figures as concrete evidence rather than speculation because the large sample size reduced the chance that random variation produced the observed split.

Figures from the analysis showed the 60 percent increase in legalized states stood in direct contrast to the 29 percent decrease elsewhere and the age-specific doubling among 18- to 29-year-olds highlighted where the impact concentrated most visibly and public health tracking can now use these benchmarks to monitor future movements.

Conclusion

The nationwide records review established measurable differences in gambling disorder diagnoses tied to sports betting legalization status and the patterns held across age groups with the strongest signal appearing among younger adults yet absolute rates stayed low in both legalized and non-legalized environments and the data continues to serve as a reference point for ongoing observation into August 2026 and beyond. The report supplies the detailed statistics that support these comparisons.