What are the factors that make it more likely to get colorectal cancer?

Numerous. Diet high in red meat, processed and smoked foods, alcohol, smoking, family history colon cancer or polyps, personal history of polyps, colon cancer or inflammatory bowel disease and age over 50.
Age family history. Like most cancers, colorectal cancer is more common as we age - thus the recommendation for screening colonoscopy at age 50. Family history makes you more prone to crc as does a history of colitis or polyps. Breast and endometrial cancer increase the risk of crc slightly. Constipation, obesity, and high fat diets may be small risk factors.
Colon cancer. Family history is most important. People with family history should start screening with colonoscopy at age 40. Everyone else at age 50.

Related Questions

Are some people more likely to get colorectal cancer?

Yes. There is a higher risk of getting colorectal cancer if it runs in a person's family, they have a genetic abnormality, and/or they have ulcerative colitis. There are likely others, but these are the ones that immediately come to my mind.
Diets heavy. In processed meats (bologna, salami, etc) and low in fresh fruits and vegtables are more likely to be at risk. Family history and genetics play a role in cause as well (lynch syndrom, polyps). The latter are prominant in young people. Bowel habit change and blood are reason for assessment at any age. See your doctor.

Is colorectal cancer hereditary? I have three family members (aunts and uncle) with colorectal cancer. Am I more likely to get it than a normal person? Should I start getting tested and when?

There. There is a genetic component to risk of colorectal cancer; but only 1 out of 6 or 7 people with these cancers have a family history so there is much more to the odds of getting it than just genetics. Current recommendations about screening do take into account family history, however. The risk is increased primarily for those with first degree relatives (parents, siblings, and children) with colorectal cancer. In your case, the relatives mentioned are not that close and your screening should start at age 50 unless you have specific personal symptoms or findings that might indicate a colon problem. (examples include blood in your stool or iron deficiency). Talk to your physician for more details.
It can be. Your true genetic risk is dependent on how many first degree relatives have had colorectal cancer and at what age and what type. If concerned you should discuss with your pcp or gastroenterologist. Screening normally begins at fifty but for some high risk patients earlier is appropriate.
Family history. Family history is extremely important in colon cancer. You should start colonoscopy screening at age 40 or ten years before the earliest case in the family, whichever is earlier. Genetic testing may be indicated as well.

How many people get colorectal cancer after 65?

Enough/a great many. The incidence of this cancer goes up greatly after age 50. This is why colonoscopy is recommended for anyone over age 50 as a guideline. Both men and women are affectedust about equally. Colonoscopy is recommended by the american cancer society “guidelines for the early detection of cancer” once every 10 years and flexible sigmoidoscopy, barium enema, and virtual colonoscopy every 5 years.

What are the risk factors for colorectal cancer?

See below. Family history of colon cancer, smoking, history of ulcerative colitis, history of colon polyps, diabetes, being african american are a few.
Many risk factors. There are many risk factors: increasing age with most cases being over 50. Adenomatous polyps are important risk factor as they can become malignant if not totally removed. Family history. Diets high in fat and low in fiber. Alcohol. Cigarette smoking. Being overweight. Diabetes. African-americdn race.

Is it possible to get colorectal cancer when you're still young?

Yes. I suppose it depends on what you mean by "still young"! although colon cancer is generally a disease of those 50 years of age and older, it can affect people in their 20s-40s.
Yes. Some people with inherited defects in dna develop colon cancer while young. They generally have a stong family history of colon cancer.

What causes colorectal cancer, and who is more likely at risk of developing it?

Multiple causes. There are multiple causes to colorectal cancer. It is a combination between genetics, and what your colon & rectum are exposed to over the course of many decades. Clearly the most at-risk patients are those with a strong family history and a documented history of gene mutations, namely something called fap and hnpcc. Take a look at some of my other posts on reducing your risk.
Can be genetiic. Can run in the family but there is an increased incidence with age. That is why a colonoscopy is advocated over the age of 50.

Who should get screened for colorectal cancer?

Everyone, most >50. Most people are considered "average risk" for colorectal cancer, and should begin screening @ 50, typically with a colonoscopy. Some people at increased risk, such as those with inflammatory bowel disease or a family history of colorectal cancer. These people may need screening at a younger age-generally 10 yrs earlier than the age when their relative got colon cancer. Talk w/ your doctor.
Every 50y/o in USA. Colon ca is the third most common (non-skin) cancer in the US. Screening may detect cancers well before they cause symptoms and lead to better outcomes. It is recommended to begin screening at age 50, unless one has a strong family history, in which case it should begin a decade earlier.
Colorectal Cancer. Otherwise healthy individuals should have a screening colonoscopy at age 50. Findings dictate subsequent followup. Individuals with a first degree relative with colon cancer should have their screening colonoscopy 10 years before the age of onset of the cancer in the relative who had cancer. Anyone with unexplained change in bowel habits, or rectal bleeding should consider colonoscopy.
Screening. Everyone starting at age 50. Those with famiky history of colon cancer or polyps should start at age 40.