Table 3. Risk factors affecting 5-year overall survival rate determined by Cox's regression analysis.

Variable	Relative Risk	95% Confident Interval	P value
T classification T3, T4 vs T1, T2	2.262	1.288-5.162	0.009*
N classification Positive vs Negative	2.851	1.968-5.228	< 0.001*
Aurora-A expression  High vs Low	2.258	1.5-6.839	0.046*

^*Statistically significant (p<0.05).