Snus users’ hearts keep on ticking, not fluttering
Led by Maria-Pia Hergens, researchers analyzed data on Swedish men who were subjects in several studies. While snus users had no risks for Afib, smokers had a small but significantly elevated risk (hazard ratio = 1.16, 95% confidence interval = 1.01-1.33).
Although smokeless tobacco cannot be proven to be absolutely safe, this study adds important evidence that any cardiovascular effect is very minor.
Given the number of institutions represented by its authors, the report is an important development for tobacco harm reduction. In contrast are the biased 1990s and 2000s studies from the Karolinska Institute. There, a small group of KI researchers had access to the construction workers’ cohort and refused to share the data. Instead, they manipulated the information to fabricate some health risks and amplify others in snus users, a fact which I documented in numerous blog posts (examples here, here, and here) and in letters to journal editors.