**Abbreviations**

NSCLC, non-small cell lung cancer; PD-1, programmed cell death protein 1; PD-L1, programmed death-ligand 1; ICIs, immune checkpoint inhibitors; PFS, progression-free survival; OS, overall survival; BMI, body mass index; CRP, C-reaction protein; NLR, neutrophil to lymphocyte ratio; LMR, lymphocyte to monocyte ratio; PLR, platelet to lymphocyte ratio; RECIST, Response Evaluation Criteria in Solid Tumors; CR, complete response; PR, partial response; SD, stable disease; PD, progressive disease; NE, not evaluate; PS, Eastern Cooperative Oncology Group Performance Status; CI, confidence interval; HR, hazard ratio; TPS, tumor proportion score; EGFR, epidermal growth factor receptor.
