CD274 and glioblastoma: In contrast, in the cutoff value ≥5% subgroup HR=1.14 (95% CI:0.98–1.30, P=0.000, I2 = 59.8%) and in the cutoff value median PD-L1 expression levels subgroup HR=1.05 (95% CI: 0.92–1.18, P=0.000, I2 = 0%), indicating that PD-L1 expression was not associated with low OS in GBM (Figure 3).