Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Application and results of four previously published methods for determining post-colonoscopy colorectal cancer (PCCRC). Note: the original le Clercq study calculated PCCRCs over a 0–60-month time period whereas all the other studies used the period of 0–36 months. In the interests of consistency and to enable more ready comparison of methods, in this particular study, the le Clercq method has been simplified to calculate PCCRCs covering a period of 0–36 months too.
