Figure 3. Multivariate analysis for VEGFR2 and PDGFR-β. When the expression of VEGFR2 and PDGFR-β receptors was assessed, there was a lower number of correlations with the patients´ clinical data. In the multivariate analysis, there was a moderate negative correlation between PDGFR-β expression and patient survival (R = -0.42). Younger patients showed moderate correlation with a higher probability of metastasis (R = -0.43).