Gustave Roussy Immune Score based on a three-category risk assessment scale serves as a novel and effective prognostic indicator for surgically resectable early-stage non-small-cell lung cancer: A propensity score matching retrospective cohort study

•Propensity-score matching analysis to assess prognostic role of GRIm-Score in operable early-stage lung cancer.•High GRIm-Score significantly correlates with worse prognosis of surgically resected early-stage lung cancer.•GRIm-Score serves as a promising prognostic discriminator in resectable early-stage lung cancer.