To evaluate the association between comprehensive smoke-free laws and changes in cardiovascular disease (CVD) mortality across US counties from 2000 to 2018.
Approach:
Study Design: A comparative effectiveness research study using longitudinal county-level panel data and the generalized synthetic control method (GSCM) to assess the impact of smoke-free laws.
Data Sources: County-level smoke-free law data from the US Tobacco Control Laws Database and mortality data from the CDC WONDER database.
Sample Selection: The final analytic sample included 38 treated counties with comprehensive smoke-free laws and 103 control counties that never adopted such laws.
Key Findings:
Comprehensive smoke-free laws are associated with reductions in CVD mortality.
The study addresses gaps in previous research regarding long-term effects and demographic variations.
The GSCM approach accounts for unobserved confounding and staggered policy adoption.
Interpretation:
Limitations:
Methodological limitations in prior studies may affect the consistency of findings.
The study relies on observational data, which may introduce biases.
