Summary: Drinking at least two cups of coffee a day, even instant coffee was associated with increased longevity and a lower risk of cardiovascular disease.
Source: European Society of Cardiology
Drinking two to three cups of coffee a day is linked with a longer lifespan and lower risk of cardiovascular disease compared with avoiding coffee, according to research published today in theEuropean Journal of Preventive Cardiology,a journal of the ESC.The findings applied to ground, instant and decaffeinated varieties.
In this large, observational study, ground, instant and decaffeinated coffee were associated with equivalent reductions in the incidence of cardiovascular disease and death from cardiovascular disease or any cause, said study author Professor Peter Kistler of the Baker Heart and Diabetes Research Institute, Melbourne, Australia.
The results suggest that mild to moderate intake of ground, instant and decaffeinated coffee should be considered part of a healthy lifestyle.
There is little information on the impact of different coffee preparations on heart health and survival.
This study examined the associations between types of coffee and incident arrhythmias, cardiovascular disease and death using data from the UK Biobank, which recruited adults between 40 and 69 years of age.
Cardiovascular disease was comprised of coronary heart disease, congestive heart failure and ischaemic stroke.
The study included 449,563 participants free of arrhythmias or other cardiovascular disease at baseline. The median age was 58 years and 55.3% were women.
Participants completed a questionnaire asking how many cups of coffee they drank each day and whether they usually drank instant, ground (such as cappuccino or filtered coffee), or decaffeinated coffee. They were then grouped into six daily intake categories, consisting of none, less than one, one, two to three, four to five, and more than five cups per day.
The usual coffee type was instant in 198,062 (44.1%) participants, ground in 82,575 (18.4%), and decaffeinated in 68,416 (15.2%). There were 100,510 (22.4%) non-coffee drinkers who served as the comparator group.
Coffee drinkers were compared to non-drinkers for the incidence of arrhythmias, cardiovascular disease and death, after adjusting for age, sex, ethnicity, obesity, high blood pressure, diabetes, obstructive sleep apnoea, smoking status, and tea and alcohol consumption.
Outcome information was obtained from medical records and death records. The median follow up was 12.5 years.
A total of 27,809 (6.2%) participants died during follow up. All types of coffee were linked with a reduction in death from any cause. The greatest risk reduction seen with two to three cups per day, which compared to no coffee drinking was associated with a 14%, 27% and 11% lower likelihood of death for decaffeinated, ground, and instant preparations, respectively.
Cardiovascular disease was diagnosed in 43,173 (9.6%) participants during follow up. All coffee subtypes were associated with a reduction in incident cardiovascular disease.
Again, the lowest risk was observed with two to three cups a day, which compared to abstinence from coffee was associated with a 6%, 20%, and 9% reduced likelihood of cardiovascular disease for decaffeinated, ground, instant coffee, respectively.
An arrhythmia was diagnosed in 30,100 (6.7%) participants during follow up. Ground and instant coffee, but not decaffeinated, was associated with a reduction in arrhythmias including atrial fibrillation.
Compared with non-drinkers, the lowest risks were observed with four to five cups a day for ground coffee and two to three cups a day for instant coffee, with 17% and 12% reduced risks, respectively.
Professor Kistler said: Caffeine is the most well-known constituent in coffee, but the beverage contains more than 100 biologically active components. It is likely that the non-caffeinated compounds were responsible for the positive relationships observed between coffee drinking, cardiovascular disease and survival.
Our findings indicate that drinking modest amounts of coffee of all types should not be discouraged but can be enjoyed as a heart healthy behavior.
Author: Justine PinotSource: European Society of CardiologyContact: Justine Pinot European Society of CardiologyImage: The image is in the public domain
Original Research: Open access.The impact of coffee subtypes on incident cardiovascular disease, arrhythmias, and mortality: long-term outcomes from the UK Biobank by Peter Kistler et al. European Journal of Preventative Cardiology
Abstract
The impact of coffee subtypes on incident cardiovascular disease, arrhythmias, and mortality: long-term outcomes from the UK Biobank
Aims
Epidemiological studies report the beneficial effects of habitual coffee consumption on incident arrhythmia, cardiovascular disease (CVD), and mortality. However, the impact of different coffee preparations on cardiovascular outcomes and survival is largely unknown. The aim of this study was to evaluate associations between coffee subtypes on incident outcomes, utilizing the UK Biobank.
Methods and results
Coffee subtypes were defined as decaffeinated, ground, and instant, then divided into 0, <1, 1, 23, 45, and >5cups/day, and compared with non-drinkers. Cardiovascular disease included coronary heart disease, cardiac failure, and ischaemic stroke. Cox regression modelling with hazard ratios (HRs) assessed associations with incident arrhythmia, CVD, and mortality. Outcomes were determined through ICD codes and death records. A total of 449563 participants (median 58 years, 55.3% females) were followed over 12.50.7 years.
Ground and instant coffee consumption was associated with a significant reduction in arrhythmia at 15cups/day but not for decaffeinated coffee.
The lowest risk was 45cups/day for ground coffee [HR 0.83, confidence interval (CI) 0.760.91,P<0.0001] and 23cups/day for instant coffee (HR 0.88, CI 0.850.92,P<0.0001). All coffee subtypes were associated with a reduction in incident CVD (the lowest risk was 23cups/day for decaffeinated,P=0.0093; ground,P<0.0001; and instant coffee,P<0.0001) vs. non-drinkers.
All-cause mortality was significantly reduced for all coffee subtypes, with the greatest risk reduction seen with 23cups/day for decaffeinated (HR 0.86, CI 0.810.91,P<0.0001); ground (HR 0.73, CI 0.690.78,P<0.0001); and instant coffee (HR 0.89, CI 0.860.93,P<0.0001).
Conclusion
Decaffeinated, ground, and instant coffee, particularly at 23cups/day, were associated with significant reductions in incident CVD and mortality. Ground and instant but not decaffeinated coffee was associated with reduced arrhythmia.
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