Table 1: Individual characteristics of the students.





Distance of living from sea
 0–5 km157672,9
 10–15 km884,1
 15–20 km1557,2
20 km34415,9

You are
 moles-skinned and rarely get sunburns99946.2
 light-skinned and easily get sunburns116353.8

Your eye colour is

Your hair colour is

Do your have freckles on your face/body

Do you have any moles on your face/body

High-risk group*

*The high-risk group consisted of students’ with at least four out of five of the following characteristics: fair skin colour, fair eyes colour, fair hair freckles, and moles.