No safe level of smoking, study finds

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People who smoke and need to quit cigarettes rather than reduce them to significantly lower their danger of heart disease and stroke, a substantial BMJ study suggests.

People who smoked even a single cigarette a day were still regarding 50% more likely to develop heart disease plus 30% more likely to have a stroke compared to people who had never smoked, experts said.

Someone said it showed there was no secure level of smoking for such illnesses.

But a professional said people who cut down were very likely to stop.

‘Stop completely’

Cardiovascular disease, not malignancy, is the greatest mortality risk for smoking cigarettes, causing about 48% of smoking-related premature deaths.

As the percentage of adults in the UK who else smoked had been falling, the percentage of people who smoked one to 5 cigarettes a day had been rising gradually, researchers said.

Their analysis of 141 studies, released in the BMJ , indicates the 20-a-day habit would cause 7 heart attacks or strokes in the group of 100 middle-aged people.

But if they significantly cut back to one a day it would nevertheless cause three heart attacks, the investigation suggests.

The particular researchers said men who smoked cigarettes one cigarette a day had in regards to a 48% higher risk of developing cardiovascular disease and were 25% very likely to have a stroke than those who experienced never smoked.

For females, it was higher – 57% just for heart disease and 31% for cerebrovascular accident.

Prof Allan Hackshaw at the UCL Cancer Institute in University College London, who directed the study, told the BBC: “There’s been a trend in a number of countries for heavy smokers to slice down, thinking that’s perfectly fine, that is the case for things like cancer.

“But for these 2 common disorders, which they’re possibly more likely to get than cancer, not necessarily the case. They’ve got to stop completely. inch

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The particular researchers said it might be expected that will smoking fewer cigarettes would decrease harm in a proportionate way because had been shown in some studies along with lung cancer.

However , they found that guys who smoked one cigarette each day had 46% of the excess danger of heart disease and 41% with regard to stroke compared with those who smoked twenty cigarettes per day.

For females it was 31% of the excess danger of heart disease and 34% just for stroke.

Prof Hackshaw said the increased dangers of cardiovascular illness were throughout a lifetime but damage could be required for just a few years of smoking.

But he said the good news is that those who quit smoking could also quickly decrease their risk of cardiovascular disease.

Cutting down not really ‘useless’

Paul Aveyard, professor of behavioural medicine in the University of Oxford, said the particular “well conducted” study confirmed exactly what epidemiologists had suspected – that will light smoking created a “substantial danger for heart disease and stroke”.

But he mentioned it was wrong to conclude cutting down smoking cigarettes was useless.

“Those who try to cut down using nicotine, whether from nicotine substitute treatment or an e-cigarette, may stop eventually and thus really decrease their risks from smoking, inch he said.

Martin Dockrell, tobacco lead in Public Health England, said: “This study adds to the growing body associated with evidence which tells us that reducing to just one cigarette a day nevertheless leaves a substantial risk of myocardial infarction and stroke. The best and most dependable thing you can do is to quit totally for good. ”

Deborah Arnott, chief executive of health charitable organisation ASH, said: “It’s addiction to pure nicotine that keeps people smoking yet it’s the tar in cigarette smoke that will does the serious damage.

“Vaping is much much less harmful, but only if you stop smoking altogether. ”

Claire Clark, director of the smokers’ team Forest, said discouraging people through cutting down smoking could be “counter-productive”.

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