Table 2.

The correlations between clinicopathological characteristics and overall survival or recurrence-free survival of SCC patients using the Kaplan-Meier method

Variable	Overall Survival (months) Mean ± SE	P	Recurrence- Free Survival (months) Mean ± SE	P
Age, y (mean ± SD)		0.073		0.058
< =45	57.21 ± 1.75		57.07 ± 1.89
> 45	52.75 ± 1.87		51.32 ± 2.12
Stage		0.060		0.107
I	56.18 ± 1.41		55.03 ± 1.69
II	48.17 ± 3.31		47.27 ± 3.60
Tumor size		0.098		0.170
< =4 cm	55.56 ± 1.61		54.41 ± 1.87
> 4 cm	50.55 ± 2.94		49.61 ± 3.21
Lymphovascular invasion		0.023		0.052
Negative	57.05 ± 1.36		55.68 ± 1.86
Positive	51.48 ± 2.25		50.53 ± 2.48
Stromal invasion depth		0.067		0.058
< 1/2	57.60 ± 1.67		57.28 ± 1.89
> =1/2	51.52 ± 2.00		50.11 ± 2.25
Lymph node metastasis		< 0.001		< 0.001
Negative	57.71 ± 0.74		57.49 ± 0.86
Positive	44.29 ± 3.86		41.29 ± 4.28
Parametrial invasion		0.228		0.027
Negative	56.65 ± 1.47		54.06 ± 1.62
Positive	46.86 ± 6.65		39.86 ± 7.81
Margin		0.531		0.573
Negative	54.41 ± 1.48		53.34 ± 1.67
Positive	48.25 ± 7.58		47.00 ± 8.66
Serum EV-Wnt 7b		< 0.001		< 0.001
Low	58.43 ± 0.56		58.35 ± 0.64
High	49.00 ± 2.69		46.90 ± 3.02