Table 1. Cox proportional hazards regression model for multivariate analysis.

Items	Classification	P
mir9-3	high expression vs lower expression	>0.05
mir10b	high expression vs lower expression	<0.05
mir31	high expression vs lower expression	>0.05
mir519c	high expression vs lower expression	<0.05
mir522	high expression vs lower expression	>0.05
mir3660	high expression vs lower expression	<0.05
mir4784	high expression vs lower expression	>0.05
mir6883	high expression vs lower expression	<0.05
age	<= 53 vs > 53	>0.05
gender	male vs female	>0.05
T-stage	I + II vs III + IV	>0.05
tumor grade	I + II vs III + IV	>0.05