Number of screenees imaged by CTC, subsequent referrals for further testing, and ultimate detection for cancer, large polyp (10 mm+), medium-sized polyp (6–9 mm), any polyp or cancer, any adenoma or cancer and advanced neoplasia, split by age and sex
| 60–64 years | 65–69 years | 70–74 years | 75+ years | |
|---|---|---|---|---|
| Number imaged by CTC | ||||
| Men | 560 | 625 | 279 | 41 |
| Women | 455 | 489 | 246 | 36 |
| Total | 1015 | 1114 | 525 | 77 |
| Number (%) with suspected polyp or cancer on CTC | ||||
| Men | 227 (40.5) | 252 (40.3) | 131 (47.0) | 22 (53.7) |
| Women | 134 (29.5) | 164 (33.5) | 77 (31.3) | 20 (55.6) |
| Total | 361 (35.6) | 416 (37.3) | 208 (39.6) | 42 (54.5) |
| Number (%) with proven cancer | ||||
| Men | 25 (4.5) | 38 (6.1) | 19 (6.8) | 7 (17.1) |
| Women | 14 (3.1) | 12 (2.5) | 8 (3.3) | 1 (2.8) |
| Total | 39 (3.8) | 50 (4.5) | 27 (5.1) | 8 (10.4) |
| Number (%) with matched 10 mm+ polyp | ||||
| Men | 86 (15.4) | 91 (14.6) | 46 (16.5) | 4 (9.8) |
| Women | 45 (9.9) | 43 (8.8) | 19 (7.7) | 6 (16.7) |
| Total | 131 (12.9) | 134 (12.0) | 65 (12.4) | 10 (13.0) |
| Number (%) with matched 6–9 mm polyp | ||||
| Men | 27 (4.8) | 28 (4.5) | 14 (5.0) | 2 (4.9) |
| Women | 14 (3.1) | 20 (4.1) | 9 (3.7) | 5 (13.9) |
| Total | 41 (4.0) | 48 (4.3) | 23 (4.4) | 7 (9.1) |
| Number (%) with any matched polyp or cancer | ||||
| Men | 158 (28.2) | 180 (28.8) | 83 (29.7) | 15 (36.6) |
| Women | 78 (17.1) | 89 (18.2) | 41 (16.7) | 13 (36.1) |
| Total | 236 (23.3) | 269 (24.1) | 124 (23.6) | 28 (36.4) |
| Number (%) with any matched adenoma or cancer | ||||
| Men | 141 (25.2) | 159 (25.4) | 80 (28.7) | 15 (36.6) |
| Women | 68 (14.9) | 78 (16.0) | 37 (15.0) | 14 (38.9) |
| Total | 209 (20.6) | 237 (21.3) | 117 (22.3) | 29 (37.7) |
| Number (%) with advanced neoplasia | ||||
| Men | 115 (20.5) | 145 (23.2) | 69 (24.7) | 11 (26.8) |
| Women | 58 (12.7) | 63 (12.9) | 32 (13.0) | 11 (30.6) |
| Total | 173 (17.0) | 208 (18.7) | 101 (19.2) | 22 (28.6) |
Percentages use the total number of screenees imaged by CTC of that sex and age category as the denominator.
Age, sex and individual's screening round were highly significant predictors of CTC detection rates in both univariate and multivariate analysis (table 6).
CTC, CT colonography.