The value of interval faecal occult blood testing in colonoscopic screening programs for those at above average risk for colorectal cancer.

Interventions: Ongoing annual offer of faecal occult blood test screening in years when colonoscopy not scheduled, within a colonoscopy based surveillance program. At present the duration would be ongoing till the invitee reaches 75 years, then subject to invitee’s wishes and health status.
Primary outcome(s): Program yield of neoplasia.[7 years from initiation of program.]
Study Design: Purpose: Prevention; Allocation: Non-randomised trial; Masking: Open (masking not used);Assignment: Parallel;Type of endpoint: Efficacy