High levels of serum platelet-derived growth factor-AA and human epidermal growth factor receptor-2 are predictors of colorectal cancer liver metastasis

Table 3 Correlation between factor levels in peripheral and tumor drainage venous blood

Correlation	r	P value
dPDGFAA-pPDGFAA	0.794	< 0.001
dHER2-pHER2	0.189	0.424
dRANTES-pRANTES	0.705	0.001
dEGF-pEGF	0.605	0.005
dMMP7-mMMP7	0.863	< 0.001
pEGF-dPDGFAA	0.678	0.001
pEGF-pPDGFAA	0.887	< 0.001
pEGF-pHER2	0.489	0.029
pHER2-pMMP7	0.529	0.016

d means factors in drainage vein blood; p means factors in peripheral vein blood. RANTES: Regulated on activation normal T cell expressed and secreted; EGF: Epidermal growth factor; PDGFAA: Platelet-derived growth factor AA; HER2: Human epidermal growth factor receptor 2; MMP7: Matrix metalloproteinase 7.