Prognostic and clinicopathological significance of circulating tumor cells detected by RT-PCR in non-metastatic colorectal cancer: a meta-analysis and systematic review

Table 4 Results of meta-regression on OS

Variables	Coef.^a	Std. Err.^b	P value	Adj R-squared^c
Year	0.5072	0.4559	0.2900	0.67%
Country	0.5352	0.5770	0.3740	1.08%
Marker	0.4133	0.5021	0.4280	−11.42%
Time point	−0.5072	0.4559	0.2900	0.67%
Patient no.	0.3751	0.4688	0.4410	−10.13%
Detection rate(mean)	−1.1526	0.4288	0.0210	93.80%
Quality of study	−0.3412	0.7123	0.6410	−12.93%

ISSN: 1471-2407