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Table 3 Number of expected clinical events for each screening strategy in the 40-year follow up model

From: Cost-effectiveness of family history-based colorectal cancer screening in Australia

  NBCSP screening iFOBT every two years Colonoscopy every 5 years Colonoscopy every 10 years
CRC cases occurring per 10,000 persons from age 50 to 90 years 6,491 4,745 2,568 4,205
Reduction in CRC incidence compared with NBCSP   27% 60% 35%
CRC by stage     
Dukes’ A 3,749 3,513 1,974 3,177
Dukes’ B 1,182 783 380 660
Dukes’ C 424 323 165 289
Dukes’ D 153 126 49 79
Deaths attributable to CRC 983 830 524 722
Reduction in CRC mortality compared with NBCSP   15% 46% 26%
Total Number of colonoscopies 21,333 72,885 167,031 109,213
Number of colonoscopies per life saved   476 363 418
  1. iFOBT2: immunochemical faecal occult blood test, COLO5: colonoscopy screening every five years, COLO10: colonoscopy screening every ten years.