Journal of Skin Cancer / 2020 / Article / Tab 2

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 lesionsPhotoaging grade
YesNoGrade 1Grade 2Grade 3Grade 4
(%) (%) (%) (%)

Mean no. of years working in ski resorts (SD, range)29.1(9.7, 10–50)18.3(12, 1–45)<0.00111.19 (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)<0.00035.14 (10.98)39.27 (9.77)49.87 (8.17)54.65 (6.34)<0.001

Sex0.0010.632
(1) Male32 (100%)145 (77.5%)28 (75.7%)67 (80.7%)64 (81%)18 (90%)
(2) Female0 (0%)42 (22.5%)9 (24.3%)16 (19.3%)15 (19%)2 (10%)

Phototype0.8760.002
15 (15.6%)28 (15%)2 (5.4%)19 (22.9%)11 (13.9%)1 (5%)
212 (37.5%)64 (34.2%)13 (35.1%)33 (39.8%)26 (32.9%)4 (20%)
36 (18.8%)58 (31%)14 (37.8%)17 (20.5%)29 (36.7%)4 (20 %)
48 (25%)30 (16%)6 (16.2%)11 (13.3%)13 (16.5%)8 (40%)
51 (3.1%)7 (3.7%)0 (0)3 (3.6%)03 (15%)

Hair colour0.0390.989
(1) L-brown9 (28.1%)43 (23%)01 (1.2%)1 (1.3%)0
(2) D-brown14 (43.8%)75 (40.1%)3 (8.1%)10 (12%)9 (11.3%)2 (10%)
(3) Black2 (6.3%)50 (26.7%)7 (18.9%)20 (24.1%)19 (24.1%)6 (30%)
(4) Redhead1 (3.1%)1 (0.5%)16 (43.2%)31 (37.3%)33 (41.8%)9 (45%)
(5) Blond6 (18.8%)18 (9.6%)11 (29.7%)21 (25.3%)17 (21.5%)3 (15%)

Eye colour0.2070.908
(1) Blue7 (21.9%)20 (10.7%)3 (8.1%)11 (13.3%)10 (12.7%)3 (11.1%)
(2) Green6 (18.8%)24 (12.8%)5 (13.5%)13 (15.7%)9 (11.4%)3 (15%)
(3) D-green5 (15.6%)25 (13.4%)2 (5.4%)12 (14.5%)13 (16.5%)3 (15%)
(4) L-Brown8 (25%)51 (27.3%)10 (27%)21 (25.3%)22 (27.8%)6 (30%)
(5) D-Brown6 (18.8%)67 (35.8%)17 (45.9%)26 (31.3%)25 (31.6%)5 (25%)

History of skin cancer0.0550.355
(1) BCC2 (6.3%)2 (1.1%)01 (1.2%)2 (2.5%)1 (5%)
(2) AK2 (6.3%)1 (0.5%)1 (2.7%)02 (2.5%)0
(3) Other0 (0%)1 (0.5%)1 (2.7%)000
(4) None28 (87.4%)183 (97.9%)25 (94.6%)82 (98,8%)75 (94.9%)19 (95%)

Freckles on back0.021<0.001
(1) Many7 (21.9%)10 (5.3%)24 (64.9%)38 (45.8%)18 (22.8%)8 (40%)
(2) Moderate5 (15.6%)25 (13.4%)4 (10.8%)16 (19.3%)33 (41.7%)4 (20%)
(3) Few11 (34.4%)46 (24.6%)2 (5.4%)9 (10.8%)17 (21.5%)2 (10%)
(4) None7 (21.9%)81 (43.3%)3 (8.1%)3 (3.6%)7 (8.9%)4 (20%)
(5) Unknown2 (6.3%)25 (13.3%)4 (10.8%)17 (20.5%)4 (5.1%)2 (10%)

Nevi on head0.5520.386
(1) 013 (40.6%)71 (38%)12 (32.4%)26 (31.3%)36 (45.6%)10 (50%)
(2) 1–515 (46.8%)102 (54.5%)21 (56.8%)49 (59%)39 (49.4%)8 (40%)
(3) >54 (12.5%)14 (7.5%)4 (10.8%)8 (9.6%)4 (5.1%)2 (10%)

Nevi on back0.0390.356
(1) 0–1012 (37.5%)112 (59.9%)23 (62.3%)44 (53%)47 (59.5%)10 (50%)
(2) 11–2510 (31.3%)50 (26.7%)12 (32.4%)26 (31.3%)15 (19%)7 (35%)
(3) 26–509 (28.1%)19 (10.2%)2 (5.4%)9 (10.8%)14 (17.7%)3 (15%)
(3) >501 (3.1%)6 (3.2%)04 (4.8%)3 (3.8%)0

Nevi on trunk0.5100.649
(1) 0–1020 (62.5%)136 (72.7%)31(83.8%)54 (65.1%)57 (72.2%)14 (70%)
(2) 11–259 (28.1%)42 (22.5%)5 (13.5%)24 (28.9%)17 (21.5%)5 (25%)
(3) 26–503 (9.4%)8 (4.3%)1 (2.7%)4 (4.8%)5 (6.3%)1 (5%)
(4) >500 (0%)1 (0.5%)0 (0%)1 (1.2%)0 (0%)0 (0%)

Nevi on upper extremities0.6860.478
(1) 0–1020 (62.5%)134 (71.7%)30 (81.1%)52 (62.7%)58 (73.4%)14 (70%)
(2) 11–2510 (31.3%)44 (23.5%)7 (18.9%)26 (31.3%)17 (21.5%)4 (20%)
(3) 26–502 (6.3%)8 (4.3%)0 (0%)4 (4.8%)4 (5.1%)2 (10%)
(4) >500 (0%)1 (0.5%)0 (0%)1 (1.2%)0 (0%)0 (0%)

Nevi on lower extremities0.520.074
(1) 0–1030 (93.8%)173 (92.5%)36 (97.3%)79 (95.2%)68 (86.1%)20 (100%)
(2) 11–252 (6.3%)10 (5.3%)1 (2.7%)2 (2.4%)9 (11.4%)0 (0%)
(3) 26–500 (0%)4 (2.1%)0 (0%)2 (2.4%)2 (2.5%)0 (0%)

Photoaging grade<0.0010.177
11 (3.1%)36 (19.3%)
27 (21.9%)76 (40.6%)
317 (53.1%)62 (33.2%)
47 (21.9%)13 (7%)

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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