Table 6.
Difference in age of diagnosis to cancer types, stratified by sibling-pair groups
| Age difference | Brother N (%) | Sister N (%) | Brother-and-sister N (%) | All N (%) | ||||
|---|---|---|---|---|---|---|---|---|
| Same cancer | Different cancer | Same cancer | Different cancer | Same cancer | Different cancer | Same cancer | Different cancer | |
| 0 | 8 (7.8) | 22 (8.3) | 13 (9.5) | 17 (7.4) | 8 (7.9) | 23 (5.3) | 29 (8.5) | 62 (6.8) |
| 1–5 | 38 (36.9) | 75 (28.4) | 54 (39.4) | 66 (28.6) | 35 (34.7) | 126 (29.0) | 127 (37.2) | 267 (28.7) |
| 6–10 | 22 (21.4) | 59 (22.3) | 28 (20.4) | 53 (22.9) | 28 (27.7) | 114 (26.3) | 78 (22.9) | 226 (24.3) |
| 11–15 | 19 (18.4) | 47 (17.8) | 14 (10.2) | 36 (15.6) | 13 (12.9) | 70 (16.1) | 46 (13.5) | 153 (16.4) |
| 16–20 | 9 (8.7) | 21 (8.0) | 16 (11.7) | 25 (10.8) | 5 (4.9) | 48 (11.1) | 30 (8.8) | 94 (10.1) |
| 21–25 | 3 (2.9) | 21 (8.0) | 8 (5.8) | 19 (8.2) | 7 (6.9) | 25 (5.8) | 18 (5.3) | 65 (7.0) |
| 26–30 | 1 (1.0) | 11 (4.2) | 2 (1.5) | 7 (3.0) | 3 (3.0) | 18 (4.1) | 6 (1.7) | 36 (3.9) |
| > 30 | 3 (2.9) | 8 (3.0) | 2 (1.5) | 8 (3.5) | 2 (2.0) | 10 (2.3) | 7 (2.1) | 26 (2.8) |
| Total | 103 (100) | 264 (100) | 137 (100) | 231 (100) | 101 (100) | 434 (100) | 341 (100) | 929 (100) |