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Although there had been suspicions of a link between smoking and various diseases, the evidence for this link had been largely circumstantial. In fact, smoking had been advertised as "healthy" for many years, and there had been no clear explanation why rates of lung cancer had soared.
To further investigate the link, the Medical Research Council (MRC) instructed its Statistical Research Unit (later the Oxford-based Clinical Trial Service Unit) to conduct a prospective study into the link. This approach to medical questions was fairly new: in the 1954 "Preliminary report"1, the researchers felt it necessary to offer a definition of the prospective principle.
The study, when it was published in 19562, would herald a new type of scientific research, showed to relevance of epidemiology and medical statistics in questions of public health, and vitally linked tobacco smoking to a number of serious diseases.
In October 1951, the researchers wrote to all registered male physicians in the United Kingdom, and obtained responses in two-thirds, 34439 of them. No further cohorts were recruited.
The respondents were stratified into decade of birth, and their cause-specific mortality, as well as general physical health and current smoking habits, followed up in further questionnaires in 1957, 1966, 1971, 1978, 19911991 like 2002, is a palindromic year. It also has the same calendar as 2002, including Easter on March 31. It is a common year starting on Tuesday. Events January January 2 Sharon Pratt Dixon is sworn in as mayor of Washington, DC becoming the first blac, and finally in 2001.
Response rates were quite high, making appropriate statistical analyses possible. The result was, that both lung cancer and "coronary thrombosis" (the then-prevalent term for myocardial infarctionplaque builds up in the walls of blood vessels. Acute myocardial infarction AMI or MI , commonly known as heart attack is a serious, sudden heart condition characterized by varying degrees of chest pain, weakness, sweating, nausea, and vomiting, sometimes) occurred markedly more often in smokers.
In the follow-up reports, published every ten years (see the 2004 article3 for a summary) more information became available. A major conclusion of the study is, for example, that smoking decreases life span up to 10 years, and that more than 50% of all smokers die of a disease known to be smoking-related.
The true impact of the study is difficult to gauge, as smoking was not considered a public health problem in the 1950sCenturies: 19th century 20th century 21st century Decades: 1900s 1910s 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s Years: 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 Events and trends Technology United States tests the first fusion bomb., and the appreciation of the problem would only grow in the ensuing decades. Nevertheless, the British doctors study was to provide conclusive evidence of linkage between smoking and lung cancer, myocardial infarction, respiratory disease and other smoking-related illnesses.
The original study was run by Richard DollRichard Doll (b. October 28, 1912 ) is a British epidemiologist, physiologist, and a pioneer in the research linking smoking to cancer. His career has been marked by controversy, including claims that Doll over-stated the links between other envioronmenta and Austin Bradford HillAustin Bradford Hill ( July 8, 1897 April 18, 1991) English epidemiologist and statistician pioneered the randomised clinical trial and, together with Richard Doll, was the first to demonstrate the connection between cigarette smoking and lung cancer.. Richard Peto joined the team in 1971 and would, with Doll, prepare all subsequent reports for publication. Doll and Peto are both celebrated epidemiologists, and their fame is largely based on their pioneering work in the study mentioned. They would continue their work on other cardiovascular studies, for example the more recent Heart Protection StudyThe Heart Protection Study is a large randomized controlled trial by the Medical Research Council (MRC) in the United Kingdom. It studies the use of statin ( simvastatin 40 mg) medication and vitamin supplementation ( vitamin E, vitamin C and beta caroten.
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