Table 3.

Evaluation of publication bias in the included literature

Evaluation index	Coef.	Std. Err.	t	P	95% CI
5-year OS	1.95	0.59	3.32	0.004	0.72–3.17
5-year OS of LN+	2.59	1.26	2.05	0.13	−1.43-6.60
5-year OS of R+	−5.97	1.60	−3.74	0.07	− 12.83-0.90
5-year OS of R-	−1.84	4.12	−0.45	0.73	−54.23-50.56
Local recurrence	−0.35	1.03	−0.34	0.74	−2.67-1.98
Distant metastasis	1.65	1.10	1.51	0.17	−0.87-4.16