Fig. 4: Association of PD-L1 IHC with clinical and histopathological characteristics.

PD-L1 CPS compared with histological subtypes (a), degree of histological differentiation (b, Mann–Whitney U = 501, p = 0.0056), level of CA-125 (c), and residual disease (d). * indicates p < 0.05; ns indicates no significance, using Kruskall–Wallis testing (a) and Mann–Whitney testing (b–d).