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(A) In elderly patients (>70 years old) with less comorbidities (Charlson Comorbidity Index score ≤1 group), patients treated with systemic therapies had significantly longer lifespans than those who underwent best supportive care (P = 0.01). (B) In another group of elderly patients who had relatively more comorbidities (Charlson Comorbidity Index score >1), whether patients received systemic therapies or not had no statistically significant effect on their OS.
