Table 2.

^* Multivaraite Cox proportional hazards model on disease-specific survival

Prognostic Factors	Multivariate
	HR	95% CI	p
Female	0.64	0.27–2.46	0.71
Age ≥45	1.84	0.38–8.83	0.45
Tumor ≥3 cm	5.35	1.47–19.5	0.01
Positive LN	3.72	0.52–26.4	0.19
Metastasis	45.10	2.70–77.6	<0.01

^*Positive LN represents regional lymph node metastasis and metastasis represents distal metastasis. LN, lymph node; HR, hazards ratio; CI, confidence interval