Table 3. Univariate proportional hazard regression of patient survival for tested variables.

Variable	Factora	N	Relative risk	95% confidence interval	P	Overall model significance
Gender	F	16	1			P = 0.207
	M	65	1.5	0.7 to 2.9	0.229
Age	continuous	81	1	0.9 to 1.1	0.063	P = 0.062
Age	<45	6				P = 0.127
	45–64	51	2.8	0.9 to 9.2	0.081
	65+	24	2.6	0.8 to 8.9	0.126
T	1–2	34	1			P = 0.038
	3–4	29	1.9	1.1 to 3.5	0.017
	Unknown	18	1.8	0.9 to 3.4	0.079
N	0–1	30	1			P = 0.006
	2–3	33	2.4	1.4 to 4.3	0.003
	Unknown	18	2.1	1.1 to 3.9	0.037
Stage 7th	I-II	17	1			P = 0.009
	III-IV	50	2.6	1.3 to 5.2	0.006
	Unknown	14	2.6	1.1 to 6.1	0.031
Stage 8th	I-II	26	1			P = 0.001
	III-IV	41	2.9	1.6 to 5.4	0.001
	Unknown	14	2.4	1.1 to 5.1	0.029
Grade	1	19	1			P = 0.876
	2	29	1.1	0.6 to 2.3	0.619
	3	31	1.1	0.6 to 2.2	0.711
	Unknown	2	2.4	0.5 to 10.7	0.246
HPV overall	no HPV	49	1			P = 0.893
	inactive HPV	11	0.9	0.4 to 1.8	0.763
	active HPV	21	1.1	0.6 to 1.9	0.776
HPV DNA	no HPV	49	1			P = 0.964
	HPV DNA+	32	1.0	0.6 to 1.7	0.965
HPV RNA	no HPV	60	1			P = 0.714
	HPV RNA+	21	1.1	0.6 to 1.9	0.712
p16	p16 negative	36	1			P = 0.569
	p16 +	22	1.2	0.7 to 2.0	0.603
	Unknown	23	0.8	0.4 to 1.5	0.510
Alcohol	No alcohol	11	1			P = 0.075
	Occasional use	18	2.3	0.8 to 6.4	0.103
	Heavy use	8	4.0	1.3 to 12.3	0.015
	Unknown	44	2.5	0.9 to 6.3	0.059
Smoking	No smoking	8	1			P = 0.279
	Former	9	2.7	0.7 to 10.3	0.138
	Current	20	2.7	0.8 to 9.1	0.115
	Unknown	44	2.7	0.8 to 8.7	0.099

^aFactors reaching statistical significance are highlighted by bold font