|  | % Ever |  |  |  |  |  |
---|---|---|---|---|---|---|---|
 |  | Tanned | Univariate | P valuea |  | Multivariate | P valueb |
Characteristic | N | Indoors | OR (95% CI) | Â | N | OR (95% CI) | Â |
Eye color | Â | Â | Â | Â | Â | Â | Â |
   Brown | 114 | 79 | 1.00 |  | 101 | 1.00 |  |
   Hazel | 55 | 75 | 0.78 (0.37 - 1.66) |  | 51 | 0.76 (0.31 - 1.83) |  |
   Green | 32 | 53 | 0.30 (0.13 - 0.69) |  | 30 | 0.18 (0.07 - 0.50) |  |
   Blue/grey | 80 | 72 | 0.70 (0.36 - 1.37) | 0.047 | 74 | 0.72 (0.33 - 1.57) | 0.008 |
Skin Color | Â | Â | Â | Â | Â | Â | Â |
   Olive | 57 | 75 | 1.00 |  |  |  |  |
   Fair | 166 | 77 | 1.10 (0.54 - 2.22) |  |  |  |  |
   Very fair | 58 | 60 | 0.50 (0.22 - 1.10) | 0.05 |  |  |  |
Skin reaction with first summer sun exposure | Â | Â | Â | Â | Â | Â | Â |
   Sunburn | 126 | 67 | 1.00 |  |  |  |  |
   Tan | 155 | 78 | 1.72 (1.01 - 2.92) | 0.046 |  |  |  |
Skin reaction with prolonged sun exposure | Â | Â | Â | Â | Â | Â | Â |
   Deep tan | 48 | 88 | 1.00 |  | 42 | 1.00 |  |
   No/Mild/Moderate Tan | 233 | 70 | 0.34 (0.14 - 0.84) | 0.009 | 214 | 0.37 (0.12 - 1.18) | 0.07 |
BMI (kg/m2) | 280 | - | 0.97 (0.92 - 1.01) | 0.117 | Â | Â | Â |
Pounds Gained since age 18 (per 10 lbs) | 278 | - | 0.81 (0.66 - 0.99) | 0.037 | 256 | 0.80 (0.63 -1.02) | 0.063 |
Alcoholic drinks under age 25 (per 300 drinks) | 275 | - | 1.01 (0.98 - 1.05) | 0.454 | Â | Â | Â |
Alcoholic drinks/year over age 25 (per 100 drinks) | 262 | - | 1.00 (0.90 - 1.11) | 0.988 | Â | Â | Â |
Smoking Status | Â | Â | Â | Â | Â | Â | Â |
   Not Current Smoker | 238 | 72 | 1.00 |  |  |  |  |
   Current Smoker | 41 | 83 | 1.86 (0.79 - 4.41) | 0.136 |  |  |  |
Education | Â | Â | Â | Â | Â | Â | Â |
   Less than Bachelor's Degree | 94 | 78 | 1.00 |  |  |  |  |
   Bachelor's Degree or more | 185 | 72 | 0.74 (0.41 - 1.32) | 0.296 |  |  |  |
Sunbathing session ages 8-15 (per 50 sessions) | 279 | - | 1.25 (1.13 - 1.39) | < 0.001 | 256 | 1.26 (1.11 - 1.42) | < 0.001 |
Sunbathing session ages 16-25 (per 50 sessions) | 279 | - | 1.18 (1.09 - 1.29) | < 0.001 | Â | Â | Â |
Sunbathing session ages 26+ (per 50 sessions) | 257 | - | 1.29 (1.12 - 1.49) | < 0.001 | 256 | 1.23 (1.05 - 1.44) | 0.003 |
Age at skin biopsy | 281 | - | 0.98 (0.93 - 1.04) | 0.549 | 256 | 0.90 (0.81 - 0.99) | 0.037 |