A recent analysis of a variety of earlier studies—a meta-analysis—has revealed a “significant” link between smoking and an increased risk for colorectal cancer and death, Science Daily is reporting. Science Daily notes that tobacco was the cause of about 5.4 million deaths in 2005, yet there are still about 1.3 billion smokers, worldwide. Health Day News reported that smoking increases the risk of CRC by about 18 percent, with a 25 percent increased risk of death, according to the study, which was published in the December 17 issue of the Journal of the American Medical Association (JAMA).
Up until now, an array of cancers have been clearly linked to smoking; this was not always the case with smoking and colorectal cancer—also known as CRC—due to inconsistent study outcomes, notes Science Daily. “Because smoking can potentially be controlled by individual and population-related measures, detecting a link between CRC and smoking could help reduce the burden of the world’s third most common tumor, which currently causes more than 500,000 annual deaths worldwide. In the United States alone, an estimate of approximately 50,000 deaths from CRC would have occurred in 2008,” the authors write, quoted Science Daily. Study author Edoardo Botteri, M.Sc., of the European Institute of Oncology, Milan, Italy, and colleagues conducted the meta-analysis, said Science Daily, in order to review and summarize published data that looked at the link between CRC and death to smoking. (more…)