Clinical characteristics and number of patients with melanoma and of controls
| Melanoma (108) | Controls (105) | p | OR | |
|---|---|---|---|---|
| NA, not applicable, *, median age; OR, odds ratios with 95% confidence intervals. | ||||
| Gender | ||||
| Women | 64.8 (70) | 54.3 (57) | – | Reference |
| Men | 35.2 (38) | 45.7 (48) | 0.12 | 0.6 (0.4–1.1) |
| Mean age at onset (SD) and range | 44.5±17.3 (14–77) | *51 (20–93) | 0.008 | NA |
| Skin type | ||||
| III/IV | 52.0 (53) | 59.0 (62) | – | Reference |
| I/II | 48.0 (49) | 41.0 (43) | 0.31 | 1.3 (0.8–2.4) |
| Skin colour | ||||
| Dark | 6.9 (7) | 27.6 (29) | – | Reference |
| Medium/light | 93.1 (94) | 72.4 (76) | <0.0.001 | 5.1 (2.1–12.3) |
| Hair colour | ||||
| Dark or dark brown | 52.0 (51) | 72.4 (76) | – | Reference |
| Blond, light brown, red | 48.0 (47) | 27.6 (29) | 0.0028 | 2.4 (1.3–4.3) |
| Eye colour | ||||
| Dark | 46.9 (46) | 67.6 (71) | – | Reference |
| Light | 53.1 (52) | 32.4 (34) | 0.003 | 3.4 (1.3–4.2) |
| Total naevi | ||||
| ⩽50 | 53.5 (54) | 93.3 (98) | – | Reference |
| >50 | 46.5 (47) | 6.7 (7) | <0.0001 | 12.2 (5.2–28.8) |
| Atypical mole syndrome | ||||
| No | 80.6 (83) | 96.2 (101) | – | Reference |
| Yes | 19.4 (20) | 3.8 (4) | 0.0004 | 6.1 (2.0–18.5) |
| Lentigines | ||||
| No | 34.4 (32) | 67.0 (69) | – | Reference |
| Yes | 65.6 (61) | 33.0 (34) | <0.0001 | 3.9 (2.1–7.0) |
| Sunburns with blistering at <15 years of age | ||||
| No | 50.0 (49) | 64.8 (68) | – | Reference |
| Yes | 50.0 (49) | 35.2 (37) | 0.03 | 1.8 (1.0–3.2) |
| Sunburns with blistering at >15 years of age | ||||
| No | 41.4 (41) | 55.2 (58) | – | Reference |
| Yes | 58.6 (58) | 44.8 (47) | 0.05 | 1.7 (1.0–3.0) |
| Holiday UV exposure at <15 years of age | ||||
| Low | 11 | 21 | – | 2.0 (0.9–4.4) |
| High | 87 | 84 | 0.09 | Reference |
| Holiday UV exposure at >15 years of age | ||||
| Low | 10 | 22 | – | Reference |
| High | 89 | 83 | 0.03 | 2.4 (1.1–5.3) |
| Sunscreen use | ||||
| Yes | 15 | 28 | – | Reference |
| No | 75 | 68 | 0.04 | 2.1 (1.0–4.2) |