The risk of developing colorectal cancer increases with advancing age. More than 90% of cases occur in people aged 50 or older. Other risk factors include having:
- Inflammatory bowel disease.
- A personal or family history of colorectal cancer or colorectal polyps.
- A genetic syndrome such as familial adenomatous polyposis (FAP) or hereditary non-polyposis colorectal cancer (Lynch syndrome).
Lifestyle factors that may contribute to increased risk of colorectal cancer include:
- Lack of regular physical activity
- Low fruit and vegetable intake
- A low-fiber and high-fat diet
- Overweight and obesity
- Alcohol consumption
- Tobacco use
*Information from the Centers for Disease Control & Prevention (CDC).