Table 3.

Results of this meta-analysis.

Outcome	No.of studies	No.of patients	HR/OR(95%CI)	P	Heterogeneity
					I²(%)	p-value
OS	14	4136	1.87(1.50-2.34)	<0.001	64.9	<0.001
LNM	7	3086	2.24(1.49-3.36)	<0.001	59.2	0.023
TS	6	2978	3.16(1.99-4.99)	<0.001	72.7	0.003

OS: overall survival, LNM: lymph node metastasis, TS: tumor stage, HR: hazard ratios, OR: odds ratios, No: number, CI: confidence interval.