Colorectal cancer remains the second cause of deaths from cancer in the USA and the number of deaths is highest among those aged 75 to 84.
Statistics from the National Cancer Institute has shown that the prevalence of colorectal cancer has been on a decline at a rate of 2.7 percent every year and the number of deaths from colorectal cancer has been decreasing at a rate of 2.5 percent every year between 2005 and 2014.
According to David Kerr, a professor of 'cancer' (which is also known as 'มะเร็ง' in the Thai language) medicine in the University of Oxford, since 1975 in the USA, the incidence of colorectal cancer in people aged 50 and has dropped by 40 percent and mortality rates dropped by half. He highlighted the following factors has been responsible for this slow and remarkable decline in morbidity and mortality rates of colorectal cancer.
Cancer-Screening - This has in enormous ways reduced the incidence of colorectal cancer and decreased mortality from it. With several screening procedures, pre-cancerous lesions and early cancer phases are detected in time and treatment is initiated early.
Better access to lower gastrointestinal endoscopic procedures like Sigmoidoscopy has improved the identification and early detection of cancer and pre-cancerous lesions.
Advanced treatment - In the past few decades, cancer-treatment has undergone notable advancements. Surgical cancer therapy is now more sophisticated and altered, radiotherapy has improved, and adjuvant chemotherapy for the node-positive disorder has been successful.
Diet - People are now well aware of the dietary risks of colorectal cancer.
More people are avoiding foods implicated in the evolution of colorectal-cancer such as smoked ham and beef.