CD274 and adenocarcinoma: To further explore factors affecting PFS and OS between patients with a GPS of 0–1 and those with a GPS of 2, we performed a subgroup analysis of the ECOG‐PS by the groups 0–1 and 2–3; histology by adenocarcinoma and non‐adenocarcinoma; PD‐L1 expression by the groups with 50%–89% and 90%–100% expression; NLR by the high‐ (≥5) and low‐ (<5) value groups, BMI by the high‐ (≥21.4) and low‐ (<21.4) BMI groups, and tumor response by PR (CR + PR) and non‐PR (SD + PD) (Table S1).