Table 3. Multivariate analysis with independent prognostic factors.

	OS			DFS
	RR	95% CI	P	RR	95% CI	P
Differentiation grade	0.63	0.44–0.92	0.015	0.51	0.33–0.79	0.002
Pathologic stage	1.67	1.25–2.23	0.001	1.59	1.17–2.18	0.003
Nuclear survivin	1.68	1.01–2.81	0.047	1.83	1.03–3.26	0.041

Abbreviations: RR = relative risk; CI = confidence interval.