Table 2 Results of univariate and multivariate analyses of postoperative patients’ survival by Cox’s proportional hazard model.

Varieties	Univariate analysis			Multivariate analysis
Varieties	HR	95% CI	P	HR	95 % CI	P
Age (≤60 or >60 years)	0.880	0.547–1.418	0.600
Gender (Male/Female)	1.177	0.731–1.895	0.502
Size of tumor (≤5 or >5 cm)	0.813	0.507–1.303	0.390
Degree of differentiation (moderate-well/poor)	0.565	0.314–1.017	0.057
Venous invasion (negative/positive)	0.788	0.461–1.348	0.384
Neural invasion (negative/positive)	0.548	0.323–0.930	0.026^a	0.877	0.504–1.524	0.641
Depth of tumor invasion (T1-2/T3-4)	0.413	0.197–0.864	0.019^a	0.570	0.267–1.214	0.145
Lymph node metastasis (negative/positive)	0.346	0.212–0.565	<0.001^c	0.422	0.253–0.705	0.00^b
ALDOA expression (negative/positive)	0.427	0.254–0.719	0.00^b	0.496	0.292–0.841	0.009^b

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