Table 3.

Classification of the included patient according to the risk groups of Ang et al. and of Rietbergen et al.

		All patients	HPV negative	HPV positive
Ang et al.	Low risk	58/258 (22.48%)		58/98 (59.18%)
	Intermediate risk	48/258 (18.60%)	8/160 (5.00%)	40/98 (40.82%)
	High risk	152/258 (58.91%)	152/160 (95.00%)
Rietbergen et al.	Low risk	71/260 (27.31%)	3/160 (1.88%)	68/100 (68.00%)
	Intermediate risk	80/260 (30.77%)	48/160 (30.00%)	32/100 (32.00%)
	High risk	109/260 (41.92%)	109/160 (68.12%)

HPV, Human papillomavirus.