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Smokeless Tobacco (Snus) and Outcome of Myocardial Infarction: a SWEDEHEART Study
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- Arefalk, Gabriel (author)
- Uppsala universitet,Kardiovaskulär epidemiologi
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- Svennblad, Bodil (author)
- Uppsala universitet,Matematiska institutionen,Uppsala kliniska forskningscentrum (UCR)
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- Andersen, Kasper, 1974- (author)
- Uppsala universitet,Uppsala kliniska forskningscentrum (UCR),Kardiovaskulär epidemiologi
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- English.
- Other publication (other academic/artistic)
Abstract
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- BackgroundBased on effects of nicotine and snus (a smokeless tobacco) on hemodynamics, pro-arrhythmia and remodelling, in combination with indications of increased risk for fatal myocardial infarction (MI) in snus users; we hypothesised that the outcome of an MI may be worse in snus users.MethodsData was extracted from the SWEDEHEART registry for all patients who underwent coronary angiography in Sweden due to MI between December 2009 and December 2014. In snus users (n=4,950) relative to snus non-users (n=55,412), we compared risks of a large MI (defined as hs-cTnT of > 10,000 ng/L, cTnT > 10 μg/L or cTnI > 10 μg/L) and death in the acute (in-hospital) setting, and death+HF (a combined endpoint of all-cause death or hospitalization for heart failure) and all-cause death at short- (<28 days) and long-term follow-up. Relations of snus use to outcomes were also analysed in pre-specified subgroups of never, previous and current smokers.ResultsA large MI was diagnosed in 10,975 patients. During long-term follow-up (median 1.9 years), 7,758 either died (n=6,044) or were hospitalized due to heart failure (n=1,714). In models adjusting for age, gender, smoking, previous MI and occupational classification (employed, unemployed/sick leave and retired), snus use was not associated with risk of large MI (odds ratio 1.01; 95% confidence interval (CI) 0.93-1.09) or death+HF (long-term Cox proportional hazard ratio (HR) 0.99; 95% CI 0.90-1.10). Nonetheless, among never-smokers snus use was associated with an increased risk for death+HF (long-term HR 1.26, 95% CI 1.03-1.55), driven by a higher mortality risk (long-term HR for death of any cause 1.29, 95% CI 1.02-1.64).ConclusionsIn this study, snus use was unrelated to acute, short-term or long-term adverse outcomes after an MI. Among never-smokers, snus use was associated with an increased risk of post-MI death.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Kardiologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Cardiac and Cardiovascular Systems (hsv//eng)
Keyword
- Cardiology
- Kardiologi
- Epidemiologi
- Epidemiology
- Medicinsk vetenskap
- Medical Science
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- vet (subject category)
- ovr (subject category)
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