CD274 and neoplasm: In our study, we performed subgroup analysis in the immunochemotherapy group according to PD‐L1 expression levels in tumours (CPS ≥ 10 or TPS ≥ 1% or IC ≥ 5% or TC ≥ 50% as PD‐L1 positive), and our results showed that the mPFS and mOS were similar between the positive and negative PD‐L1 expression subgroups.