What are the leading causes and risk factors for cancers?
There is scientific evidence that cancer and other common ailments like cardiovascular diseases, diabetes, obesity, and many digestive tract diseases are related to lifestyle.
Exposure to carcinogens, poor eating habits, stress, lack of sleep are commonly listed causes.
By far, the largest reliably known percentage is the 30% of current U.S. cancer deaths due to tobacco. However, some nutritional factors (s) may eventually be of comparable importance. (Doll et al., 1981)
Smoking, alcohol use, and low fruit and vegetable intake were the leading risk factors for death from cancer worldwide and in low-and-middle-income countries. In high-income countries, smoking, alcohol use, overweight, and obesity are the most important causes of cancer. Sexual transmission of the human papillomavirus is a leading risk factor for cervical cancer in women in low-and-middle-income countries. Reducing exposure to key behavioral and environmental risk factors would prevent a substantial proportion of deaths from cancer. (Danaei, G et al., 2005)
References:
Richard Doll, Richard Peto, The Causes of Cancer: Quantitative Estimates of Avoidable Risks of Cancer in the United States Today, JNCI: Journal of the National Cancer Institute, Volume 66, Issue 6, June 1981, Pages 1192–1308, Causes of Cancer: Quantitative Estimates of Avoidable Risks of Cancer in the United States Today
Danaei, G., Vander Hoorn, S., Lopez, A. D., Murray, C. J., Ezzati, M., & Comparative Risk Assessment collaborating group (Cancers. (2005). Causes of cancer in the world: comparative risk assessment of nine behavioural and environmental risk factors. The Lancet, 366(9499), 1784-1793.
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