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.
Example AHP model regarding the selection of a colorectal cancer screening programme. Prep = test preparation; FOBT = annual faecal occult blood tests; Flex Sig = flexible sigmoidoscopy every 5 years; DCBE = double contrast barium enema every 5 years; and Cscope = colonoscopy every 10 years.
