Fig. 2From: An age-group analysis on the efficacy of chemotherapy in older adult patients with metastatic biliary tract cancer: a Japanese cancer registry cohort studyOverall survival comparison between the BSC and chemotherapy group. (a) Analysis before propensity score matching and (b) Analysis after propensity score matchingAbbreviations: CT, chemotherapy; BSC, best supportive care; OS, overall survivalBack to article page