p53 overexpression by IHC predicts for response to bevacizumab plus chemotherapy. (A) Kaplan-Meier curves for PFS (left) and OS (right) on the basis of p53 status by IHC. (B) Kaplan-Meier curves for PFS (left) and OS (right) for cases with p53 overexpression by IHC by treatment arm. IHC, immunohistochemistry; OE, overexpressed; OS, overall survival; PFS, progression-free survival; WT, wild-type.