| Females n = 281 | Males n = 120 | ||||
---|---|---|---|---|---|---|
 |  | Never Indoor |  |  | Never Indoor |  |
 | Indoor Tanners | Tanners |  | Indoor Tanners | Tanners |  |
Characteristic | n = 206 | n = 75 | P valuea | n = 46 | n = 74 | P valuea |
 | Median (IQR) |  | Median (IQR) |  | ||
Age at skin biopsy, y | 36.8 (33.2-38.4) | 37.4 (34.1-39.1) | 0.111 | 36.2 (31.2-38.4) | 36.5 (31.3-38.4) | 0.848 |
Sunbathing sessions, n | 490 (268-870) | 162 (51-386) | < 0.001 | 106 (34-458) | 11 (34-458) | 0.001 |
BMI, kg/m2 | 22.8 (20.8-26.6) | 24.3 (21.5-28.6) | 0.053 | 27.3 (25.2-35) | 27.4 (24.8-30.7) | 0.955 |
Pounds gained since age 18, lbs | 15 (2-30) | 16 (5-36) | 0.126 | 25 (12.8-35) | 20 (10-40) | 0.672 |
Alcoholic drinks under age 25, n | 416 (0-1664) | 104 (0-1141) | 0.399 | 2040 (0-4928) | 1410 (107-3631) | 0.901 |
Alcoholic drinks per year age 25+, n | 112 (0-214) | 77 (0-240) | 0.688 | 197 (0-571) | 212 (60.0-502) | 0.417 |
 | nb (%) |  | nb (%) |  | ||
Eye color, n (%) | Â | Â | 0.035 | Â | Â | 0.705 |
   Brown | 90 (43.7) | 24 (32.0) |  | 20 (43.5) | 28 (37.8) |  |
   Hazel | 41 (19.9) | 14 (18.7) |  | 8 (17.4) | 11 (14.9) |  |
   Green | 17 (8.3) | 15 (20.0) |  | 1 (2.2) | 5 (6.8) |  |
   Blue | 58 (28.2) | 22 (29.3) |  | 17 (37.0) | 30 (40.5) |  |
Skin Color, n (%) | Â | Â | 0.042 | Â | Â | 0.797 |
   Olive | 43 (20.9) | 14 (18.7) |  | 10 (21.7) | 16 (21.6) |  |
   Fair | 128 (62.1) | 38 (50.7) |  | 30 (65.2) | 45 (60.8) |  |
   Very Fair | 35 (17.0) | 23 (30.7) |  | 6 (13.0) | 13 (17.6) |  |
Skin reaction with first summer sun, n (%) | Â | Â | 0.062 | Â | Â | 0.811 |
   Sunburn | 85 (41.3) | 41 (54.7) |  | 15 (32.6) | 21 (28.4) |  |
   Tan | 121 (58.7) | 34 (45.3) |  | 31 (67.4) | 52 (70.3) |  |
Skin reaction with prolonged sun, n (%) | Â | Â | 0.024 | Â | Â | 0.616 |
   Deep Tan | 42 (20.4) | 6 (8.0) |  | 8 (17.4) | 17 (23.0) |  |
   No/Mild/Moderate Tan | 164 (79.6) | 69 (92.0) |  | 38 (82.6) | 57 (77.0) |  |
Smoking Status, n (%) | Â | Â | 0.214 | Â | Â | 0.190 |
   Not Current Smoker | 172 (83.5) | 66 (90.4) |  | 33 (71.7) | 61 (82.4) |  |
   Current Smoker | 34 (16.5) | 7 (9.6) |  | 13 (28.3) | 12 (16.2) |  |
Education, n (%) | Â | Â | 0.372 | Â | Â | 0.999 |
   Less than Bachelor's Degree | 73(35.4) | 21(28.0) |  | 22(47.8) | 34(45.9) |  |
   Bachelor's Degree or more | 133(64.6) | 52(69.3) |  | 24(52.2) | 40(54.1) |  |