Table 4.

Simulated number of lifetime incident colorectal cancers per 1000 individuals by stage and screening strategy^*

Strategy	Stage I	Stage II	Stage III	Stage IV	Total	% Reduction compared with no screening
No screening	12	23	15	16	66	NA
Hemoccult II	21	11	6	4	42	37
Immunochemical FOBT	20	8	4	3	35	47
Flexible sigmoidoscopy	14	10	6	5	34	49
Colonoscopy	14	8	5	3	30	56
Flexible sigmoidoscopy + Hemoccult II	16	8	4	3	31	53

^*FOBT =  fecal occult blood test; NA = not applicable.