Table 2.

Univariate Cox proportional hazards regression model

Tumor stage	HR	95%CI	p-value
Stage 2 vs stage 1	1.29	0.48–3.43	0.61
Stage 3 vs stage 1	2.39	1.27–4.53	0.0073**
Stage 4 vs stage 1	4.63	2.29–9.36	1.9e−05***

HR hazard ratio, CI confidence interval

*P < 0.05; **P < 0.01; ***P < 0.001