Table 1.
Multivariate analysis of selected known risk factors between melanoma cases and healthy controls
| variables | Controls (n = 219) N (%) |
melanoma cases (n = 206) N (%) |
OR (95% CI)* |
|---|---|---|---|
| Age (y) | |||
| ≤47 | 113 (51.6) | 87 (42.2) | 1.00 |
| >47 | 106 (48.4) | 119 (57.8) | 1.65 (1.06, 2.58) |
| Gender | |||
| Male | 81 ((37.0) | 114 (55.3) | 1.00 |
| Female | 138 (63.0) | 92 (44.7) | 0.33 (0.20, 0.52) |
| Hair color | |||
| Black or brown | 169 (77.2) | 136 (66.0) | 1.00 |
| Blond or red | 50 (22.8) | 70 (34.0) | 1.62 (1.00, 2.64) |
| Eye color | |||
| Not blue | 158 (72.1) | 126 (61.2) | 1.00 |
| Blue | 61 (27.9) | 80 (38.8) | 1.37 (0.87, 2.16) |
| Skin color | |||
| Dark brown | 114 (52.1) | 85 (41.3) | 1.00 |
| Fair | 105 (47.9) | 121 (58.7) | 0.97 (0.93, 1.02) |
| Tanning ability after prolonged sun exposure | |||
| Average or deep | 165 (75.7) | 150 (73.9) | 1.00 |
| Light or none | 53 (24.3) | 53 (26.1) | 0.81 (0.48, 1.39) |
| Lifetime sunburns with blistering | |||
| 0 | 93 (42.7) | 46 (22.4) | 1.00 |
| ≥1 | 125 (57.3) | 159 (77.6) | 2.27 (1.23, 2.10) |
| Freckling in the sun as a child | |||
| No | 108 (49.5) | 88 (42.7) | 1.00 |
| Yes | 110 (50.5) | 118 (57.3) | 1.17 (0.75, 1.82) |
| Reported use of sunlamp | |||
| No | 149 (68.0) | 128 (62.1) | 1.00 |
| Yes | 70 (32.0) | 77 (37.9) | 2.68 (1.59, 4.51) |
*
Multivariate logistic analysis including age, gender, hair color, skin color, eye color, tanning ability, lifetime sunburns, freckling in the sun as a child, and use of sunlamp.