Table 1 Patient characteristics, screening history by case–control status
Cases | Controls | |
|---|---|---|
Total numbers | 284 | 568 |
Index of multiple deprivation (IMD), N (%) a | ||
1st quartile | 75 (26) | 135 (25) |
2nd quartile | 61 (22) | 146 (26) |
3rd quartile | 68 (24) | 139 (25) |
4th quartile | 80 (28) | 132 (24) |
Mean age at diagnosis or pseudodiagnosis (range) | 60.7 (50.4–70.5) | 60.7 (50.4–70.5) |
Age group, N (%) | ||
50–54 | 50 (18) | 100 (18) |
55–59 | 85 (29) | 170 (29) |
60–64 | 67 (24) | 134 (24) |
65+ | 82 (29) | 164 (29) |
Mean age at first screen, years (range) | 55.3 (45.2–65.4) | 55.5 (43.5–65.5) |
Number of screening visits, N (%) | ||
0 | 77 (27) | 63 (11) |
1 | 87 (31) | 185 (32) |
2 | 66 (23) | 198 (35) |
3 | 45 (16) | 106 (19) |
4+ | 10 (3) | 16 (3) |
Mean number of screens (range) | 1.39 (0–5) | 1.70 (0–5) |
Outcome of first screen, N (%) | ||
Routine recall | 190 (92) | 498 (99) |
Recall to assessment and benign | 4 (2) | 7 (1) |
Recall to assessment and cancer | 13 (6) | 0 (0) |
Mode of detection, N (%) | ||
Non-attender | 77 (27) | |
First screen (screen detected) | 10 (3) | |
Subsequent screen (screen detected) | 32 (12) | |
Interval cancer | 165 (58) | |
TMN stage, N (%) b | ||
1 | 37 (14) | |
2 | 137 (49) | |
3 | 25 (9) | |
4 | 76 (28) | |
Mean age at death, years (range) | 63.0 (50.8–77.6) | |
