Table 3.

Publication bias by Egger’s and Begg’s test

Variables	P-value
	Egger’s	Begg’s
Age	0.849	>0.999
Sex	0.514	0.711
Tumor infiltration	0.45	0.348
Node metastasis	0.252	0.213
TNM stage	0.825	0.536
Pathological grade	0.309	0.462
Recurrence	0.328	0.174
PFS	–	>0.999
DFS	0.862	0.734
OS	0.053	0.089

Abbreviations: TNM, tumor–node–metastasis; PFS, progression-free survival; DFS, disease-free survival; OS, overall survival.