Survival analysis according to treatment lines and three age groups in the colorectal cancer cohort. In the first‐line subgroup, progression‐free survival (PFS) (A) and overall survival (OS) (B) were not significantly different among the age groups (p = .672 and p = .839, respectively). In the second‐line subgroup, PFS (C) and OS (D) were also similar among the age groups (p = .582 and p = .808, respectively).