Comprehensive Smoke-Free Laws Linked to Sustained Drop in CVD Mortality

Comprehensive smoke-free laws are associated with a sustained, long-term reduction in cardiovascular disease (CVD) mortality at the county level, according to a comparative effectiveness study published in JAMA Network Open.¹

The findings build on prior research linking smoke-free laws to short-term cardiovascular benefits by suggesting that reductions in CVD mortality may persist for more than a decade, while also indicating that those benefits are not distributed equally across populations.

“In this study, comprehensive smoke-free laws were associated with lower county-level CVD mortality over a 12-year postpolicy period in the US,” the study investigators wrote. “Using the [generalized synthetic control method] with staggered policy adoption, we observed sustained declines in CVD mortality following policy implementation.”

Researchers from the University of California, Los Angeles, and the University of California, Irvine, analyzed an analytic sample of 38 counties that adopted comprehensive 100% smoke-free laws covering workplaces, restaurants, and bars between 2007 and 2018 and compared them with 103 counties that did not adopt such policies during the study period.

Using the generalized synthetic control method, an approach designed to handle staggered policy rollouts without relying on the parallel-trends assumption required by traditional difference-in-differences models, the team tracked county-level, age-adjusted CVD mortality from 2000 through 2018 using data from CDC WONDER, the American Nonsmokers' Rights Foundation's tobacco law database, and US Census and American Community Survey demographics.

Comprehensive smoke-free laws were associated with an average annual reduction of 12.0 CVD deaths per 100,000 population over the 12-year postpolicy period (95% CI, –21.3 to –2.7). The association strengthened over time, reaching a cumulative reduction of 137.7 deaths per 100,000 by year 12. Adjusted models produced nearly identical estimates, and the findings remained consistent in sensitivity analyses using an alternative staggered difference-in-differences approach.

Disparities Persist

The benefits were far from uniform. Adults aged 65 years and older experienced an average annual reduction of 84.4 CVD deaths per 100,000 population, compared with a much smaller, statistically insignificant reduction of 3.7 deaths per 100,000 among adults aged between 25 and 64 years.

Men experienced a significant reduction of 16.8 deaths per 100,000, whereas the association among women was essentially null (0.2; 95% CI, –20.5 to 20.9). Non-Hispanic White populations experienced a significant reduction of 12.6 deaths per 100,000, whereas the estimate for non-Hispanic Black populations was imprecise and trended in the opposite direction (6.3; 95% CI, –25.0 to 37.7).

The authors suggested that differences in policy implementation, exposure to secondhand smoke in private settings, and broader structural factors may contribute to these disparities. Factors such as housing conditions, occupational exposures, and unequal access to smoking cessation resources may also influence how different populations experience the benefits of smoke-free policies.

Managed Care Implications

For payers and population health teams, the findings reinforce smoke-free policy as a potentially low-cost, high-leverage strategy for long-term cardiovascular risk reduction, particularly among older adults who carry a substantial CVD burden and associated health care costs.

However, the demographic differences identified in the study suggest that health plans and systems operating in areas with comprehensive smoke-free laws should not assume uniform reductions in risk across all populations. Public health guidance from the CDC emphasizes that smoke-free laws are most effective when implemented as part of a broader tobacco control strategy that also includes smoking cessation support, education, and other population health interventions.²

Therefore, tailored tobacco cessation outreach, efforts to reduce secondhand smoke exposure in the home, and enhanced screening and prevention strategies for at-risk subgroups may warrant consideration to help ensure that the benefits of smoke-free policies are more equitably distributed.¹

“Policies targeting smoking in public venues need to be complemented by strategies addressing residual tobacco exposure in private environments,” the researchers wrote. “Consideration of structural factors and targeted policy implementation may be important for achieving broader and more consistent reductions in cardiovascular outcomes.”

References

1. Wu C, Habib M, Wong ND, et al. Comprehensive smoke-free laws and cardiovascular disease mortality in US counties. JAMA Netw Open. 2026;9(6). doi:10.1001/jamanetworkopen.2026.21170
2. Smokefree policies improve health. CDC. Last reviewed November 30, 2021. Accessed July 13, 2026. https://archive.cdc.gov/www_cdc_gov/tobacco/secondhand-smoke/protection/improve-health.htm