Table 1.
Characteristics of cases and controls in the Australian Melanoma Family Study and Leeds case–control study
| Characteristic |
Australia N (%) |
Leeds N (%) |
|---|---|---|
| Total, cases and controls | 1112 | 2516 |
| Cases | 616 (55) | 2,012 (80) |
| Controls | 496 (45) | 504 (20) |
| Sex | ||
| Female | 663 (60) | 1,438 (57) |
| Male | 449 (40) | 1,078 (43) |
| Age at diagnosis/interview (years) † | ||
| 18–29 | 291 (26) | 105 (4) |
| 30–39 | 733 (66) | 287 (11) |
| 40–49 | 88 (8) | 445 (18) |
| 50–69 | 0 (0) | 1,335 (53) |
| ≥70 | 0 (0) | 344 (14) |
| Ethnic background ‡ | ||
| English | 676 (61) | 2,340 (93) |
| Scottish, Irish, Welsh | 54 (5) | 120 (5) |
| Other Northern European | 49 (4) | 14 (1) |
| Southern European | 12 (1) | 6 (0) |
| Eastern European | 251 (23) | 4 (0) |
| Mixed/Other European | 20 (2) | 28 (1) |
| Non‐European | 49 (4) | 0 (0) |
| Missing | 1 | 4 |
†Leeds cases and controls were unselected for age at diagnosis. In Australia, all cases were <40 years at diagnosis and all population controls were <40 years when ascertained; cases and controls could be up to age 44 years at interview for this analysis.
‡Self‐reported.