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Distribution of risk factors for melanoma in cases and controls in the discovery set.
| Risk factors | Cases, n (%) | Controls, n (%) |
|---|---|---|
| Sex (female) | 317 (64) | 3376 (60) |
| Age (> 55) | 75 (15) | 1001 (18) |
| Hair color (red or blonde) | 67 (16) | 710 (14) |
| Number of moles on the left arm (> 2)* | 66 (18) | 559 (12) |
| Number of severe sunburns (> 5)* | 209 (51) | 2152 (44) |
| Tendency to burn (painful burn)* | 110 (27) | 869 (18) |
significantly different between cases and controls (P value< 0.05)
