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Table 1 Demographic, lifestyle, and skin cancer risk factors in BCC and SCC cases and controls
| Controls (n = 316) | BCC (n=218) | SCC (n = 169) | |||
|---|---|---|---|---|---|
| Variable | n (%) | n (%) | p-value1 | n (%) | p-value1 |
| Age mean (S.D.) | 55.6 (11.8) | 62.8 (11.9) | <.0001 | 64.8 (9.6) | <.0001 |
| Age (years) | |||||
| 18–29 | 9 (2.9) | 1 (0.5) | <.0001 | 1 (0.6) | <.0001 |
| 30–39 | 21 (6.7) | 6 (2.8) | 2 (1.2) | ||
| 40–49 | 55 (17.4) | 24 (11.0) | 10 (5.9) | ||
| 50–59 | 109 (34.5) | 46 (21.1) | 30 (17.8) | ||
| 60–69 | 88 (27.9) | 64 (29.4) | 68 (40.2) | ||
| 70–80 | 34 (10.8) | 77 (35.3) | 58 (34.3) | ||
| Gender | |||||
| Male | 117 (37.0) | 133 (61.0) | <.0001 | 108 (63.9) | <.0001 |
| Female | 199 (63.0) | 85 (39.0) | 61 (36.1) | ||
| Ethnicity | |||||
| Non-Hispanic | 280 (88.6) | 208 (95.4) | 0.003 | 161 (95.3) | 0.0003 |
| Hispanic | 32 (10.1) | 7 (3.2) | 2 (1.2) | ||
| Education | |||||
| ≤12 years | 32 (10.1) | 46 (21.1) | 0.0004 | 36 (21.3) | 0.001 |
| >12 years | 280 (88.6) | 168 (77.1) | 129 (76.3) | ||
| Smoked 100 cigarettes | |||||
| Never | 161 (50.9) | 81 (37.2) | 0.002 | 51 (30.2) | <.0001 |
| Ever | 154 (48.7) | 134 (61.5) | 114 (67.5) | ||
| Alcohol consumption | |||||
| ≥ 1 drink in past year | 274 (86.7) | 177 (81.2) | 0.09 | 130 (76.9) | 0.02 |
| No drinks in past year | 40 (12.7) | 39 (17.9) | 35 (20.7) | ||
| Eye color | |||||
| Blue | 94 (29.7) | 87 (40.0) | 0.009 | 69 (40.8) | 0.02 |
| Green | 50 (16.1) | 24 (11.0) | 25 (14.8) | ||
| Hazel | 52 (16.5) | 48 (22.0) | 31 (18.3) | ||
| Light brown | 36 (11.4) | 22 (10.1) | 18 (10.7) | ||
| Dark brown | 80 (25.3) | 35 (16.1) | 22 (13.0) | ||
| Hair Color | |||||
| Black/Brown | 245 (77.5) | 152 (69.7) | 0.04 | 113 (66.9) | 0.02 |
| Blonde/Red | 70 (22.2) | 65 (29.8) | 53 (31.4) | ||
| Color of un-tanned skin | |||||
| White | 299 (94.9) | 209 (96.3) | 0.38 | 161 (95.3) | 0.55 |
| Brown | 15 (4.8) | 7 (3.2) | 6 (3.6) | ||
| Cutaneous sensitivity to sunlight exposure | |||||
| Sunburn with blisters | 29 (9.2) | 33 (15.1) | 0.0001 | 22 (13.0) | 0.005 |
| Sunburn w/o blisters | 96 (30.4) | 95 (43.6) | 71 (42.0) | ||
| Mild sunburn/tan | 144 (45.6) | 65 (29.8) | 50 (29.6) | ||
| Tan/no change color | 44 (13.9) | 21 (9.6) | 22 (13.0) | ||
| Tanning ability to sunlight exposure | |||||
| It is unable to tan | 22 (7.0) | 15 (6.9) | 0.04 | 26 (15.4) | <.0001 |
| Tan if you work at it | 103 (32.6) | 93 (42.7) | 77 (45.6) | ||
| It tans easily | 186 (58.9) | 104 (47.7) | 62 (37.6) | ||
