Table 1.
Descriptive characteristics of individuals recruited to studies
| Country | Australia | Spain | UK | ||||
|---|---|---|---|---|---|---|---|
| Case/Control | Case | Control | Case | Control | Case | Control | |
| Number screened | 596 | 476 | 747 | 109 | 1586 | 499 | |
| Age at diagnosis/recruitment1 | < 40 (%) | 596 (100) | 377 (79) | 232 (31) | 18 (17) | 289 (18) | 61 (12) |
| ≥ 40 (%) | 0 | 99 (21) | 508 (69) | 91 (83) | 1297 (82) | 438 (88) | |
| Affected relatives1,2 | 0 (%) | 500 (83.9) | - | 690 (93.2) | - | 1470 (92.7) | - |
| 1 (%) | 76 (12.8) | - | 34 (4.6) | - | 101 (6.3) | - | |
| 2+ (%) | 20 (3.4) | - | 16 (2.2) | - | 15 (0.9) | - | |
| Number of melanoma primaries1,2 | 1 | 581 (97.5) | - | 639 (86.4) | - | 1495 (94.3) | - |
| 2 | 14 (2.4) | - | 80 (10.8) | - | 73 (4.6) | - | |
| 3+ | 1 (0.1) | - | 21 (2.8) | - | 18 (1.1) | - | |
1Age at diagnosis, number of affected relatives and number of melanoma primaries were not available for seven Spanish cases.
2Data on family history were not reported for controls as this information is not relevant to this analysis, and number of primary melanomas was not reported as no controls had melanoma at recruitment to the study.