Table 1.

Available tumors and their characteristics, obtained from previous publications 8, 16

Tumor and patient characteristics	Number of patients			P‐value
	HPV+ (N = 75)	HPV− (N = 64)	All (N = 139)
Age at diagnosis (mean, years)	56.3	65.1	60.4	<0.001a
Sex
Male	51 (55%)	41 (45%)	92	0.6b
Female	24 (51%)	23 (49%)	47
TNM stagec
I	0 (0%)	2 (100%)	2	0.04a
II	7 (64%)	4 (36%)	11
III	22 (69%)	10 (31%)	32
IV	37 (55%)	30 (45%)	67
Unknown	9 (33%)	18 (67%)	27
Histopathology grade
High	7 (50%)	7 (50%)	14	0.06a
Moderate	26 (43%)	34 (57%)	60
Low	42 (65%)	23 (35%)	65
Treatment
Preoperative radiotherapyd	48 (71%)	20 (29%)	68	<0.001a
Postoperative radiotherapyd	8 (67%)	4 (33%)	12
Radiotherapy onlyd	12 (44%)	15 (56%)	27
Surgery only	1 (100%)	0 (0%)	1
Palliative treatment	6 (19%)	25 (81%)	31

^aChi‐square test.

^bIndependent student t‐test.

^cTNM stage according to UICC 1997.

^dConventional radiotherapy (2.0 Gy/day, total dose: 68 Gy).