. 2015 Aug;7(8):1441–1451. doi: 10.3978/j.issn.2072-1439.2015.08.10

Table 5. Relationship between the four main prognostic factors and 5-year survival.

Characteristics	5-year survival
Characteristics	Coefficient^a	P value^b
Study year	0.0204	0.0323
DFI (<3 years)	0.8933	0.5399
Resection of metastases (incomplete)	−0.6099	0.2474
No. of pulmonary metastases (>1)	−0.6493	0.2471
The hormone receptor status of metastases (−)	−0.0381	0.9772

^a, coefficient represents a linear relationship between each prognostic factor and the survival outcome by a univariable meta-regression model. The sign of the coefficient indicates the positivity or negativity of the relationship. ^b, the P value (<0.1) of each coefficient indicates whether the linear correlation was significant or not.