Fig. 2: Analysis of DFS in specified subgroups.

a Validation cohort 1; b validation cohort 2. EGFR epidermal growth factor receptor, KRAS Kirsten rat sarcoma viral oncogene, VPI visceral pleural invasion, STAS spread through air space, LVI lymph-vascular invasion, IASLC International Association for the Study of Lung Cancer, HR hazard ratio, CI confidence interval, DFS disease-free survival.