Table 4.

Results of Cox's regression

	b	Hazard ratio (HR)	95% CI of HR	p-value
ONU	0.406	1.50	0.67, 3.35	0.323
Stage 2	0.139	1.15	0.44, 3.00	0.776
Stage 3	0.947	2.58	0.72, 9.18	0.144
High grade	0.189	1.21	0.46, 3.17	0.701