Results We found no correlation between PD-L1 expression, and OS (HR, 1.13; 95% CI, 0.95-1.36; I2=78%) or PFS (HR, 1.07; 95% CI, 0.88-1.30; I2=75%) in ovarian cancer. Subgroup analyses showed that higher PD-L1 expression was associated with poor OS in non-Asian patients with ovarian cancer (HR, 1.26; 95% CI, 1.07-1.481; I2=59%). We found that…[Read more]