Table 1.

Clinical characteristics of patients in the training cohort and validation cohort.

	Training cohort		Validation cohort		P value
	N = 333		N = 166
	No.	%	No.	%
Age
≤60	164	49.2	80	48.2	0.824
>60	169	50.8	86	51.8
Gender
Female	87	26.4	46	27.7	0.706
Male	246	73.9	120	72.3
Smoking
Former and current smoker	204	61.3	110	66.3	0.276
Nonsmoker	129	38.7	56	33.7
HPV status
Negative	53	15.9	26	15.7	0.926
Positive	23	6.9	10	6.0
Unknown	257	77.2	130	78.3
Grade
G1-2	236	70.9	123	74.1	0.749
G3-4	84	25.2	37	22.3
Unknown	13	3.9	6	3.6
Stage
I	17	5.1	8	4.8	0.888
II	45	13.5	24	14.5
III	56	16.8	22	13.3
IV	170	51.1	89	53.6
Unknown	45	13.5	23	13.9