= 50 years Test or procedure - Fecal occult blood test(FOBT( or fecal immunochemical test (FIT( Flexible sigmoidoscopy FOBT and Flexible sigmoidoscopy Double - Contrast barium enema (DCBE) Colonoscopy Frequency Annual, staing at age 50 Every 5 years, staing at age 50 Annual FOBT, (or FIT) and flexible sigmoidoscopy every 5 years, staing at age 50 DCBE every 5 years, staing at age 50 Colonoscopy every 10 years, staing at age 50 Ref: Harrison's 19th edition Pgno : 481 Schwaz 10th edition Pgno : 298">