Gender Male 12  
  Female 1  
Cutaneous Phototype I 1  
  II 7  
  III 3  
  IV 2  
XerodermaPigmentosum Yes 2  
Type of predominant sun exposure Intermittent 3  
  Continuous 10  
Sun burns Yes 8  
  No 5  
Hair colour Black 7  
  Brown 3  
  Blond 2  
  Red hair 1  
Eye colour Black 4  
  Brown 3  
  Green 1  
  Blue-gray 5  
Sun exposure Before 10 y.o. Between10 y.o. & 18 y.o After 18 y.o
>8 weeks/year 2 1 1
4-8 weeks/year 1 3 4
2-4 weeks/year 1 3 3
<2 weeks/year 6 3 2
no 3 3 2
Use of sunscreens Before 10 y.o Between10 y.o. & 18 y.o. After 18 y.o
Always 2 2 2
Usually 0 0 3
Sometimes 0 1 2
Never 11 10 6
Actinic damage Yes 13  
Actinic keratosis Yes 13  
Actinic cheilitis Yes 3  
  No 9  
  Unknown 1  
Previous BCC Yes 5  
  No 6  
  Unknown 2  
Previous SCC Yes 3  
  No 3  
  Unknown 7  
Presence of solar lentigo Some 3  
  Mulitiple 3  
  Many 5  
  No 0  
  Unknown 2  
Previous UVA Yes 0  
  No 13  
Number of nevi <50 7  
  50-100 1  
  100-200 0  
  >200 2  
  Unknown 3  
Previous history of cancer melanoma 4  
Previous familial history of cancer melanoma 5  
  colon carcinoma 1  
Table 2: Baseline characteristics of the studied population-N=13.