Fig. 3.

Relation between VEGF and clinico-pathological features. a Pathological types (DCI vs IDC) at Z=2.8 (P=0.004). b Clinical stages (stage I to IV) at X²=10 (P=0.018). c Histological grading (grade I to III) at X²=6.4 (P=0.04). d Lymph node involvement (negative involvement vs positive involvement) (Z=3.6, P=0.003). Statistical analysis was done using the non-parametric test; as for two variables, the Mann-Whitney U test (Z-value) was used; and for more than two variables, the Kruskal-Wallis H test (X² test) was used