Abstract

429 Background: Although measuring frailty is important to estimate risks and to aid shared decision making, the impact of frailty on surgical indication in muscle-invasive bladder cancer (MIBC) remain unclear. We aimed to investigate the impact of frailty on treatment modality selection in patients with MIBC. Methods: Between October 2013 and September 2019, we underwent frailty evaluation in 149 patients with localized or locally advanced MIBC (T2-4N0-1M0). Frailty evaluation included modified Frailty index (mFI), Fried phenotype (FP), and frailty discriminant score (FDS). Primary purpose was comparison of frailty between the patients who underwent radical cystectomy (RC group) and trimodal therapy for bladder preservation (TMT group). Optimal cutoff values of frailty between the RC and non-RC groups was defined by receiver operating characteristic curve. Secondary purpose included overall survival (OS) comparison between in patients with frail and non-frail. Overall survival (OS) was compared using Kaplan-Meier method and Cox regression analysis. Results: Of 149, 88 and 61 patients were classified to RC and TMT group, respectively. The median age in the TMT group was significantly older than that in the RC group (80 vs. 68 years). A significantly higher prevalence of frailty was observed in the TMT group than that of the RC group in FP ≥3 (5.7% vs. 61%, P < 0.001), mFI ≥2 (22% vs. 61%, P < 0.001), and FDS ≥2.30 (40% vs. 72%, P < 0.001). Univariate logistic regression analysis showed that frailty was significantly associated with TMT. Frailty was significantly associated with overall survival between the RC and TMT groups in the FP and FDS, whereas it was not the case in mFI. Conclusions: Frailty was significantly associated with indication of RC in patients with MIBC. Measuring frailty is important to estimate risks and to aid shared decision making.

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