Table 1

Stage of colorectal cancer in intervention and control arms

Stages of CRCIntervention armControl arm
First screenRe-screenAll screen-detectedNon-responders*Interval cancersAdenoma follow-upTotal
First invitationLater invitationWithin 2 yearsAfter 2 years
Dukes' A42 (51%)6 (29%)49 (37%)97 (41%)76 (8%)29 (17%)105 (12%)7 (15%)314 (14%)258 (11%)
Dukes' B17 (20%)7 (33%)47 (36%)71 (30%)321 (33%)49 (28%)263 (30%)15 (32%)719 (32%)735 (31%)
Dukes' C20 (24%)7 (33%)24 (18%)51 (22%)233 (24%)52 (30%)240 (28%)15 (32%)591 (26%)653 (28%)
Dukes' D4 (5%)1 (5%)8 (6%)9 (4%)228 (24%)42 (24%)162 (19%)7 (15%)452 (20%)468 (20%)
Not Known004 (3%)4 (2%)101 (11%)1 (1%)94 (11%)3 (6%)203 (9%)240 (10%)
Total CRC83211322369591738644722792354
  • * Did not respond to any screening round.

  • Had negative faecal occult blood test at the screening before diagnosis of CRC was made or it was not detected by investigation after a positive test.

  • CRC, colorectal cancer.