Clinical Study
Skin Cancer Prevalence in Outdoor Workers of Ski Resorts
Table 2
Characteristics of the study population and associations with the presence of actinic keratosis lesions and photoaging grade.
| | Presence of AK lesions | | Photoaging grade | | Yes | No | Grade 1 | Grade 2 | Grade 3 | Grade 4 | | | (%) | (%) | (%) | (%) |
| | Mean no. of years working in ski resorts (SD, range) | 29.1(9.7, 10–50) | 18.3(12, 1–45) | <0.001 | 11.19 (9.23) | 14.08 (9.43) | 27.17 (12.0) | 31.95 (11.32) | <0.001 |
| | Mean age in years (SD, range) | 51.7 (7.4, 35–66) | 42.5 (11.3, 19–66) | <0.000 | 35.14 (10.98) | 39.27 (9.77) | 49.87 (8.17) | 54.65 (6.34) | <0.001 |
| | Sex | | | 0.001 | | | | | 0.632 | | (1) Male | 32 (100%) | 145 (77.5%) | 28 (75.7%) | 67 (80.7%) | 64 (81%) | 18 (90%) | | (2) Female | 0 (0%) | 42 (22.5%) | 9 (24.3%) | 16 (19.3%) | 15 (19%) | 2 (10%) |
| | Phototype | | | 0.876 | | | | | 0.002 | | 1 | 5 (15.6%) | 28 (15%) | 2 (5.4%) | 19 (22.9%) | 11 (13.9%) | 1 (5%) | | 2 | 12 (37.5%) | 64 (34.2%) | 13 (35.1%) | 33 (39.8%) | 26 (32.9%) | 4 (20%) | | 3 | 6 (18.8%) | 58 (31%) | 14 (37.8%) | 17 (20.5%) | 29 (36.7%) | 4 (20 %) | | 4 | 8 (25%) | 30 (16%) | 6 (16.2%) | 11 (13.3%) | 13 (16.5%) | 8 (40%) | | 5 | 1 (3.1%) | 7 (3.7%) | 0 (0) | 3 (3.6%) | 0 | 3 (15%) |
| | Hair colour | | | 0.039 | | | | | 0.989 | | (1) L-brown | 9 (28.1%) | 43 (23%) | 0 | 1 (1.2%) | 1 (1.3%) | 0 | | (2) D-brown | 14 (43.8%) | 75 (40.1%) | 3 (8.1%) | 10 (12%) | 9 (11.3%) | 2 (10%) | | (3) Black | 2 (6.3%) | 50 (26.7%) | 7 (18.9%) | 20 (24.1%) | 19 (24.1%) | 6 (30%) | | (4) Redhead | 1 (3.1%) | 1 (0.5%) | 16 (43.2%) | 31 (37.3%) | 33 (41.8%) | 9 (45%) | | (5) Blond | 6 (18.8%) | 18 (9.6%) | 11 (29.7%) | 21 (25.3%) | 17 (21.5%) | 3 (15%) |
| | Eye colour | | | 0.207 | | | | | 0.908 | | (1) Blue | 7 (21.9%) | 20 (10.7%) | 3 (8.1%) | 11 (13.3%) | 10 (12.7%) | 3 (11.1%) | | (2) Green | 6 (18.8%) | 24 (12.8%) | 5 (13.5%) | 13 (15.7%) | 9 (11.4%) | 3 (15%) | | (3) D-green | 5 (15.6%) | 25 (13.4%) | 2 (5.4%) | 12 (14.5%) | 13 (16.5%) | 3 (15%) | | (4) L-Brown | 8 (25%) | 51 (27.3%) | 10 (27%) | 21 (25.3%) | 22 (27.8%) | 6 (30%) | | (5) D-Brown | 6 (18.8%) | 67 (35.8%) | 17 (45.9%) | 26 (31.3%) | 25 (31.6%) | 5 (25%) |
| | History of skin cancer | | | 0.055 | | | | | 0.355 | | (1) BCC | 2 (6.3%) | 2 (1.1%) | 0 | 1 (1.2%) | 2 (2.5%) | 1 (5%) | | (2) AK | 2 (6.3%) | 1 (0.5%) | 1 (2.7%) | 0 | 2 (2.5%) | 0 | | (3) Other | 0 (0%) | 1 (0.5%) | 1 (2.7%) | 0 | 0 | 0 | | (4) None | 28 (87.4%) | 183 (97.9%) | 25 (94.6%) | 82 (98,8%) | 75 (94.9%) | 19 (95%) |
| | Freckles on back | | | 0.021 | | | | | <0.001 | | (1) Many | 7 (21.9%) | 10 (5.3%) | 24 (64.9%) | 38 (45.8%) | 18 (22.8%) | 8 (40%) | | (2) Moderate | 5 (15.6%) | 25 (13.4%) | 4 (10.8%) | 16 (19.3%) | 33 (41.7%) | 4 (20%) | | (3) Few | 11 (34.4%) | 46 (24.6%) | 2 (5.4%) | 9 (10.8%) | 17 (21.5%) | 2 (10%) | | (4) None | 7 (21.9%) | 81 (43.3%) | 3 (8.1%) | 3 (3.6%) | 7 (8.9%) | 4 (20%) | | (5) Unknown | 2 (6.3%) | 25 (13.3%) | 4 (10.8%) | 17 (20.5%) | 4 (5.1%) | 2 (10%) |
| | Nevi on head | | | 0.552 | | | | | 0.386 | | (1) 0 | 13 (40.6%) | 71 (38%) | 12 (32.4%) | 26 (31.3%) | 36 (45.6%) | 10 (50%) | | (2) 1–5 | 15 (46.8%) | 102 (54.5%) | 21 (56.8%) | 49 (59%) | 39 (49.4%) | 8 (40%) | | (3) >5 | 4 (12.5%) | 14 (7.5%) | 4 (10.8%) | 8 (9.6%) | 4 (5.1%) | 2 (10%) |
| | Nevi on back | | | 0.039 | | | | | 0.356 | | (1) 0–10 | 12 (37.5%) | 112 (59.9%) | 23 (62.3%) | 44 (53%) | 47 (59.5%) | 10 (50%) | | (2) 11–25 | 10 (31.3%) | 50 (26.7%) | 12 (32.4%) | 26 (31.3%) | 15 (19%) | 7 (35%) | | (3) 26–50 | 9 (28.1%) | 19 (10.2%) | 2 (5.4%) | 9 (10.8%) | 14 (17.7%) | 3 (15%) | | (3) >50 | 1 (3.1%) | 6 (3.2%) | 0 | 4 (4.8%) | 3 (3.8%) | 0 |
| | Nevi on trunk | | | 0.510 | | | | | 0.649 | | (1) 0–10 | 20 (62.5%) | 136 (72.7%) | 31(83.8%) | 54 (65.1%) | 57 (72.2%) | 14 (70%) | | (2) 11–25 | 9 (28.1%) | 42 (22.5%) | 5 (13.5%) | 24 (28.9%) | 17 (21.5%) | 5 (25%) | | (3) 26–50 | 3 (9.4%) | 8 (4.3%) | 1 (2.7%) | 4 (4.8%) | 5 (6.3%) | 1 (5%) | | (4) >50 | 0 (0%) | 1 (0.5%) | 0 (0%) | 1 (1.2%) | 0 (0%) | 0 (0%) |
| | Nevi on upper extremities | | | 0.686 | | | | | 0.478 | | (1) 0–10 | 20 (62.5%) | 134 (71.7%) | 30 (81.1%) | 52 (62.7%) | 58 (73.4%) | 14 (70%) | | (2) 11–25 | 10 (31.3%) | 44 (23.5%) | 7 (18.9%) | 26 (31.3%) | 17 (21.5%) | 4 (20%) | | (3) 26–50 | 2 (6.3%) | 8 (4.3%) | 0 (0%) | 4 (4.8%) | 4 (5.1%) | 2 (10%) | | (4) >50 | 0 (0%) | 1 (0.5%) | 0 (0%) | 1 (1.2%) | 0 (0%) | 0 (0%) |
| | Nevi on lower extremities | | | 0.52 | | | | | 0.074 | | (1) 0–10 | 30 (93.8%) | 173 (92.5%) | 36 (97.3%) | 79 (95.2%) | 68 (86.1%) | 20 (100%) | | (2) 11–25 | 2 (6.3%) | 10 (5.3%) | 1 (2.7%) | 2 (2.4%) | 9 (11.4%) | 0 (0%) | | (3) 26–50 | 0 (0%) | 4 (2.1%) | 0 (0%) | 2 (2.4%) | 2 (2.5%) | 0 (0%) |
| | Photoaging grade | | | <0.001 | | | | | 0.177 | | 1 | 1 (3.1%) | 36 (19.3%) | | | | | | 2 | 7 (21.9%) | 76 (40.6%) | | | | | | 3 | 17 (53.1%) | 62 (33.2%) | | | | | | 4 | 7 (21.9%) | 13 (7%) | | | | |
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L-brown, light brown; D-brown, dark brown; BCC: basal cell carcinoma; AK: actinic keratosis. In bold those data with statistical significance.
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