HPV 18   patients-pigmentacije control Total yes N 17   17 HP 100%   100% VP 56.70%   28.30% No N 13 30 43 HP 30.20% 69.80% 100% VP 43.30% 100% 71.70% Total N 30 30 60 HP 50% 50% 100%  X2-TEST   X2=23.72 DF=1 P<0.001

Table 3: Contingency tables presence of HPV 18 in groups of patients with pigmentation and result x2-test