0 a small, simple, tube-shaped water animal --
1 a small mass of cells that grows in the body, and is usually not harmful --
2 a small mass of tissue that grows in the body --
This study significantly extended earlier work in terms of the assumptions regarding polyp dwell time and post-polypectomy surveillance.
For small polyps, only one-tenth of those probabilities was used (38).
Measures of test sensitivity, which varied by polyp size, and test specificity determined the success or failure of screening tests.
The effectiveness of screening average-risk persons is derived from early detection of cancer and removal of polyps, lowering the incidence of cancer and cancer-related deaths.
The assumption made for polyp dwell time critically affected the attractiveness of alternative screening strategies.
Early detection of polyps and cancer can also reduce eventual treatment costs.
For adenomatous and hyperplastic polyps, initial probabilities were estimated to be 25% and 5%, respectively (34;38).
Persons who were found to have polyps underwent transition to a surveillance group after polyps were removed.
