SynthesisUrologic oncology2025
Evaluating surrogates for overall survival in the adjuvant treatment of bladder cancer with chemotherapy.
Synthesis in Urologic oncology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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18 authors.
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Abstract
introductionSurrogates for overall survival (OS) can expedite the development of adjuvant treatments for bladder cancer. We evaluated whether disease-free survival (DFS) or distant metastasis-free survival (DMFS) are valid surrogates for OS in patients with muscle-invasive disease treated with cisplatin-based chemotherapy after radical cystectomy.
methodsWe analyzed individual patient data from 1075 patients enrolled in 9 randomized controlled trials (RCTs) identified by systematic review. These RCTs compared adjuvant cisplatin-based chemotherapy combined with local treatment versus local treatment alone and excluded neoadjuvant chemotherapy. We measured the patient-level association between DFS/DMFS and OS using Spearman's correlation coefficient (ρ), and the trial-level association between hazard ratios (HRs) using R
resultsThe evaluation of DFS in the ITT population showed ρ = 0.89 (95% confidence interval [CI] 0.87-0.90) and R
conclusionIn the adjuvant treatment of bladder cancer with cisplatin-based chemotherapy, DFS is a moderate to strong surrogate for OS, while DMFS is a strong surrogate for OS.
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