• Cecal Intubation Rate

    The cecum is the very end of the colon. A highly skilled endoscopist knows how to reach the end of the cecum, but also knows when not to reach the cecum. It is not always safe to attempt to reach the end of the cecum, so this number should not be 100 percent, but it should be greater than 95 percent. See our score.

    Withdrawal Time

    This is the time it takes an endoscopist to remove the scope after reaching the end of the cecum. This is an indication of the thoroughness of the endoscopist. Research has shown that withdrawal times under six minutes are linked to a significantly higher number of missed polyps or other growths. Therefore, the withdrawal time should be greater than six minutes.See our score.

    Adenoma Detection Rates

    This refers to the percentage of screening colonoscopies where an adenomatous polyp is found. This should be greater than 15 percent in women over 50 and greater than 25 percent in men over 50. Higher detection rates have been linked to better colon prep, longer examinations, better colonic distension, and ultimately better colon cancer prevention.See our score.

    Unplanned Perforation

    This occurs when the scope unintentionally makes a small hole in the wall of the colon. This can lead to pain, distention, and infection.See our score.

    Post-op Bleeding

    It is not uncommon to have some bleeding from the rectum after colonoscopy. However, severe or prolonged bleeding is not a normal occurrence and may be a sign of a problem.See our score.


    It is extremely rare for a patient to acquire a bacterial infection from colonoscopy. When standards are correctly followed, the rate of infection should be zero.See our score.


    It is extremely rare for a patient to have complications that result in death after a colonoscopy. The rate of death should be zero.See our score.