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BMC Cardiovascular Disorders
Published in: BMC Cardiovascular Disorders 1/2016

Open Access 01-12-2016 | Research article

Alcohol consumption and mortality in patients undergoing coronary artery bypass graft (CABG)-a register-based cohort study

Authors: Mads Phillip Kofoed Grabas, Steen Møller Hansen, Christian Torp-Pedersen, Henrik Bøggild, Line Rosenkilde Ullits, Ulrik Deding, Berit Jamie Nielsen, Per Føge Jensen, Charlotte Overgaard

Published in: BMC Cardiovascular Disorders | Issue 1/2016

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Abstract

Background

Previous studies have shown that compared with abstinence and heavy drinking, moderate alcohol consumption is associated with a reduced risk of mortality among the general population and patients with heart failure and myocardial infarction. We examined the association between alcohol consumption and mortality in coronary artery bypass graft (CABG) patients.

Method

We studied 1,919 first-time CABG patients using data on alcohol consumption and mortality obtained from Danish national registers from March 2006 to October 2011. Alcohol consumption was divided into the following groups: abstainers (0 units/week), moderate consumers (1–14 units/week), moderate-heavy drinkers (15–21 units/week) and heavy drinkers (>21 units/week). Hazard ratios (HR) of all-cause mortality were calculated using Cox proportional hazard regression analysis.

Results

The median follow-up was 2.2 years [IQR 2.0]. There were 112 deaths, of which 96 (86 %) were classified as cardiovascular. Adjustments for age and sex showed no increased risk of all-cause mortality for the abstainers (HR 1.61, 95 % CI, 1.00–2.58) and moderate-heavy drinkers (HR 1.40, 95 % CI, 0.73–2.67) compared with moderate consumers. However, heavy drinkers had a high risk of all-cause mortality compared with moderate consumers (HR 2.44, 95 % CI, 1.47–4.04). A full adjustment showed no increase in mortality for the abstainers (HR 1.59, 95 % CI, 0.98–2.57) and moderate-heavy drinkers (HR 1.68, 95 % CI, 0.86–3.29), while heavy drinkers were associated with an increased mortality rate (HR 1.88, 95 % CI, 1.10–3.21). There was no increased risk of 30-day mortality for the abstainers (HR 0.74, 95 % CI, 0.23–2.32), moderate-heavy drinkers (HR 0.36, 95 % CI, 0.07–1.93) and heavy drinkers (HR 2.20, 95 % CI, 0.65–7.36).

Conclusion

There was no increased risk of mortality for abstainers (0 units/week) or moderate-heavy drinkers (15–21 units/week) following a CABG. Only heavy drinking (>21 units/week) were significantly associated with an increased mortality rate. These results suggest that only heavy drinking present a risk factor among CABG patients.
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Metadata
Title
Alcohol consumption and mortality in patients undergoing coronary artery bypass graft (CABG)-a register-based cohort study
Authors
Mads Phillip Kofoed Grabas
Steen Møller Hansen
Christian Torp-Pedersen
Henrik Bøggild
Line Rosenkilde Ullits
Ulrik Deding
Berit Jamie Nielsen
Per Føge Jensen
Charlotte Overgaard
Publication date
01-12-2016
Publisher
BioMed Central
Published in
BMC Cardiovascular Disorders / Issue 1/2016
Electronic ISSN: 1471-2261
DOI
https://doi.org/10.1186/s12872-016-0403-3

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