BAT 2541.27p About us Our products How we work Sustainability Investors Media Reporting Careers The primary health issues of smoking Knowing the risks Over the years, epidemiological studies have associated smoking with many different serious and fatal diseases. The diseases most studied have been lung cancer, chronic obstructive pulmonary disease and coronary heart disease, mainly because these are all important causes of death in many countries. Lung cancer These statistical studies consistently reported very strong associations between smoking and lung cancer, such that it is reasonable to conclude that smoking is an important cause of lung cancer. The statistics report higher incidence of lung cancer in groups that smoke for more years and smoke more cigarettes per day, with the length of time people have been smoking thought to be the most important factor. It has been estimated (though estimates vary considerably) that around 10-15 per cent of lifelong smokers get lung cancer and, that of all the people who get lung cancer, around 90 per cent are smokers. After quitting, risks begin to decline and will vary according to a person’s smoking history. A former smoker’s level of risk in respect of the above diseases may approach that of a non-smoker after about 10 years or so of abstinence. Chronic obstructive pulmonary disease (COPD) COPD includes chronic bronchitis and emphysema. The statistical studies consistently report strong relationships between smoking and COPD that are of similar magnitude to the risks identified between smoking and lung cancer. As with lung cancer, the incidence is highest in groups that smoke for longer and smoke more cigarettes per day. Quitting is thought to slow the progression of the disease. Risks in groups of ex-smokers tend to remain higher than for non-smokers, but lower than for those who continue to smoke. Coronary heart disease (CHD) Smoking is one of the causes of coronary heart disease. Heart disease is linked with many factors along with smoking; health authorities also regard high cholesterol, high blood pressure, obesity and lack of exercise as important. Some studies have reported that the risks for heart disease are greater in groups of people that have more than one of these risk factors (for example, smokers who take little exercise). The smoking-related risks of heart disease reduce relatively rapidly after quitting. Smoking in pregnancy Public health authorities advise that pregnant women should not smoke, and have publicised this widely. Many statistical studies have reported a link between lower birth weight in babies and mothers who smoke throughout pregnancy. Some statistical studies have reported, amongst other factors, links between smoking in pregnancy and infant mortality, premature birth, miscarriage and stillbirth. Other health issues Epidemiological studies have reported various increased risks of other diseases among smokers. These include stroke (cerebrovascular disease), heart attack, aortic aneurysm, diseases affecting the circulation (such as peripheral vascular disease) and cancers of the throat, mouth, bladder, stomach and kidneys. The strength of the evidence linking these illnesses with smoking varies amongst the diseases and amongst different groups of people in different countries. External links UK Department of Health American Heart Association International Union Against Cancer Our products Our portfolio Reduced-risk products*† Marketing our products responsibly Youth access prevention Manufacturing Working with retailers Tobacco The primary health issues of smoking Our global partnership with McLaren Home Our products Tobacco The primary health issues of smoking Follow us Latest tweets BAT @BATplc #ICYMI: BAT’s commitment to #diversity and #inclusion has been rewarded with a significant piece of recognition. W… twitter.com/i/web/status/1… 26 Nov Check out our Quarterly Science Updates to find out more about the and accelerating BAT's… twitter.com/i/web/status/1… 25 Nov Current UK share price 2541.27p -70.23p 26 Nov 2021 16:45 Quick Links Modern Slavery Statement Gender Pay Report Annual Report Sustainability Report Science and Technology Report Share price data Worldwide websites Standards of Business Conduct Site map Contact us BAT Globe House 4 Temple Place London WC2R 2PG +44 (0) 20 7845 1000 Accessibility Privacy Notice Cookie Notice Conditions of use Financial information We collect and store information on your device when you use this website including setting cookies. Some are essential, while others are used to enhance your experience, and to operate and improve the website. You can withdraw your consent at any time for non-strictly necessary cookies. Please choose the accept all button if you consent for us to use these non-strictly necessary cookies and the personal information they collect for the purposes described in our Cookie Notice. Accept all cookies Disable non-essential Customise settings