Table 4. Results of Cox proportional hazards model.

	Regression coefficient	Standard error	Wald χ2	Hazard ratio	95% Confidence interval	P
microRNA-21	1.107	0.465	5.923	3.457	2.165–11.518	0.013
microRNA-214	1.058	0.446	5.642	3.138	2.014–10.259	0.017
microRNA-34a	−0.835	0.371	5.148	0.452	0.202–0.915	0.021
microRNA-133a	−0.946	0.382	6.137	0.307	0.113–0.874	0.011
microRNA-539	−0.887	0.369	5.474	0.358	0.155–0.896	0.018
TNM stage	0.953	0.392	5.016	2.893	1.496–8.125	0.024
Metastasis or recurrence	1.154	0.458	6.529	3.628	2.217–12.316	0.007
microRNA-30c	−0.738	0.426	3.045	0.689	0.445–1.828	0.074