habits, physical activity, smoking and alcohol consumption. About 25% of the CRC cases have a genetic predisposition, and 5% of CRC patients have inherited factors associated with its development. 5,6 Family history of CRC and the presence of common chronic conditions, such as metabolic syndrome and fatty liver, were among the key factors reported by existing literature. In a report from Continuous Update Project, 7 being physically active, consuming wholegrains, dairy products, foods containing dietary fiber and taking calcium supplements are protective factors against the risk of CRC. 8-11 On the contrary, consuming red or processed meat, consumption of alcoholic beverages, being overweight or obese, and being tall are the risk factors of CRC. 9,11-13 These factors associated with CRC were supported by a meta-analysis including 103 global cohort studies. 14 Recent studies emphasized that global variations in socioeconomic development, dietary habits, lifestyle factors, ethnicity and genetics might be drivers of its diverse epidemiology among different countries. The present review discusses the prevalence of CRC; its risk factors and validated models for risk stratification as developed in various countries.