Comparison of cases with interval cancers and controls with a negative result at a preceding colonoscopy with respect to indication and completeness of colonoscopy
| Group | Indication and completeness of colonoscopy | Cases with interval cancer, N (%) | Controls, N (%) | p Value |
| Total | Indication | |||
| Screening | 30 (39.0) | 218 (50.9) | ||
| Positive FOBT | 20 (26.0) | 55 (12.9) | ||
| Other | 27 (35.1) | 155 (36.2) | 0.009 | |
| Complete | ||||
| Yes | 59 (81.9) | 447 (93.3) | ||
| No | 13 (18.1) | 32 (6.7) | 0.001 | |
| Men | Indication | |||
| Screening | 10 (29.4) | 148 (58.0) | ||
| Positive FOBT | 12 (35.3) | 27 (10.6) | ||
| Other | 12 (35.3) | 80 (31.4) | 0.0001 | |
| Complete | ||||
| Yes | 29 (90.6) | 258 (94.5) | ||
| No | 3 (9.4) | 15 (5.5) | 0.37 | |
| Women | Indication | |||
| Screening | 20 (46.5) | 70 (40.5) | ||
| Positive FOBT | 8 (18.6) | 28 (16.2) | ||
| Other | 15 (34.9) | 75 (43.4) | 0.60 | |
| Complete | ||||
| Yes | 30 (75.0) | 189 (91.8) | ||
| No | 10 (25.0) | 17 (8.3) | 0.002 | |
| <70 years | Indication | |||
| Screening | 18 (40.9) | 91 (49.2) | ||
| Positive FOBT | 13 (29.6) | 24 (13.0) | ||
| Other | 13 (29.6) | 70 (37.8) | 0.03 | |
| Complete | ||||
| Yes | 34 (79.1) | 195 (92.4) | ||
| No | 9 (20.9) | 16 (7.6) | 0.007 | |
| ≥70 years | Indication | |||
| Screening | 12 (36.4) | 127 (52.3) | ||
| Positive FOBT | 7 (21.2) | 31 (12.8) | ||
| Other | 14 (42.4) | 85 (35.0) | 0.18 | |
| Complete | ||||
| Yes | 25 (86.2) | 252 (94.0) | ||
| No | 4 (13.8) | 16 (6.0) | 0.11 | |
Numbers of cancers with missing data: sex: 0 (0%), age: 0 (0%), indication: 1 (1.3%), completeness: 6 (7.7%); numbers of controls with missing data: sex: 0 (0%), age: 0 (0%), indication: 87 (16.9%), completeness: 36 (7.0%).
FOBT, faecal occult blood test.