PFS and OS stratified by age, comorbidity index, and PS. Kaplan-Meier survival curves were used to compare survival probabilities of PFS and OS based on age (patients aged <70 years vs ≥70 years), CCI score (patients with scores of 0 or 1 vs ≥2), and ECOG PS (patients with ECOG of 0 or 1 vs ≥2). No statistically significant difference was found in median survival probability for each stratified group.