. 2016 May 12;2016:3076380. doi: 10.1155/2016/3076380

Table 2.

The p value obtained by comparing HPV 16 to the other HPV types using χ ² test.

p value, obtained after applying a chi square test
HPV types	Before conization	6 months	12 months	18 months
16 versus 18	<0.001^s	<0.001^s	0.023^s	0.02^s
16 versus 31	<0.001^s	<0.001^s	0.006^s	0.02^s
16 versus 33	<0.001^s	<0.001^s	0.006^s	0.02^s
16 versus 35	<0.001^s	<0.001^s	0.006^s	0.02^s
16 versus 45	<0.001^s	<0.001^s	0.006^s	0.02^s
16 versus 52	0.003^s	0.002^s	0.006^s	0.02^s
16 versus 58	<0.001^s	<0.001^s	0.006^s	0.02^s
16 versus 6	<0.001^s	<0.001^s	0.063^ns	0.178^ns
16 versus 11	<0.001^s	<0.001^s	0.023^s	0.073^ns
16 versus other types	<0.001^s	<0.001^s	0.006^s	0.02^s

^sSignificant differences (with 0.05; 0.01; and 0.001 level of significance).

^nsInsignificant differences (with 0.05 level of significance).

From the second table we can see that the most frequent HPV type is 16. More than that, this HPV type seems to be the most persistent and dangerous. We can see that there are extremely significant differences between HPV 16 and the other HPV types, in most of the cases.