Prognostic Role of the Circulating Tumor Cells Detected by Cytological Methods in Gastric Cancer: A Meta-Analysis

Table 3

Results of metaregression on OS and PFS.

Variables	OS				PFS
	Coef.	Std. err.		Adj -squared	Coef.	Std. err.		Adj -squared
Country		0.2920	0.555		0.4922	0.4600	0.333	18.62%
Score	0.3353	0.3580	0.369	14.16%		0.7327	0.304	2.50%
Methodology	0.1810	0.2714	0.519		0.9800	0.3875	0.053	73.92%
Population	0.0445	0.2507	0.862		0.0001	0.6618	>0.999
CTC-high	0.1265	0.2551	0.630		0.4266	0.4353	0.372	1.48%

Adj -squared: proportion of between-study variance explained; : number; Coef.: coefficient; Std. err.: standard error.