| First round % (n) | Second round % (n) | Third round % (n) | |
| Colonoscopy within 4 weeks | 44.1 (2945) | 61.6 (2772) | 79.1 (1696) |
| gFOBT positives having colonoscopy | |||
| Total | 85.5 (3464) | 89.5 (3123) | 81.3 (2044) |
| Males | 85.4 (2144) | 90.1 (1911) | 81.3 (1226) |
| Females | 85.7 (1320) | 88.6 (1212) | 81.2 (818) |
| Colonoscopy completion | |||
| Total | 88.7 (3072) | 91.6 (2861) | 94.7 (1936) |
| Males | 91.0 (1951) | 94.1 (1798) | 98.1 (1203) |
| Females | 85.0 (1121) | 87.7 (1063) | 89.5 (733) |
| Complications | |||
| Admissions | 0.3 (3464) | 0.4 (3123) | 0.1 (2044) |
| Deaths | 0 | 0 | 0 |
There were no statistically significant differences between males and females in the numbers undergoing colonoscopy, but the differences between males and females in colonoscopy completion were significant at the p<0.01 level in all rounds (χ2 test).
gFOBT, guaiac faecal occult blood testing.