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JOURNAL ARTICLE
META-ANALYSIS
SYSTEMATIC REVIEW
Active surveillance for non-muscle invasive bladder cancer: A systematic review and pooled-analysis.
INTRODUCTION: One of the Non-Muscle Invasive Bladder Cancer (NMIBC) treatment options recently recommended by International Guidelines is represented by Active Surveillance (AS),. Herein we carried out a systematic review and pooled-analysis of currently available evidences in order to provide recommendations for daily urological practice.
MATERIAL AND METHODS: The PubMed, EMBASE, and Coch rane Library databases were searched with the terms "Non-Muscle Invasive" or "pTa/pT1" and "Bladder Cancer" or "Bladder Tumor". A meta-analysis was conducted to estimate the pooled upstage rate (from pTa to pT1/T2), the pooled upgrade (from G1-2 to G3), the proportion of pts still in AS and the pooled AS failure rate across all studies. A random-effects model was used to derive the pooled effect sizes and the 95% confidence intervals (CIs).
RESULTS: 7 studies were included, accounting for 558 patients (pts). AS failure rate was 67% (95%CI 44-84%) and 32% of pts were still on AS (14-56%) during a median AS time of 15,6 months. Progression to worst grade or stage was observed in 19% of pts (95%CI 11-30%). Upgrade to G3 and upstage to pT1 were observed in 44% (95%CI 13.6-79.8%) and 8% (95%CI 3.9-15.9%) respectively.
CONCLUSIONS: AS for Low Grade NMIBC can be considered safe and feasible, even if only in clinical trial context. We encourage multicenters to perform randomized clinical trials to obtain data about the quality of life of pts on AS, which are scarce, and to rapidly make AS an integral part of daily urological practice as soon as possible.
MATERIAL AND METHODS: The PubMed, EMBASE, and Coch rane Library databases were searched with the terms "Non-Muscle Invasive" or "pTa/pT1" and "Bladder Cancer" or "Bladder Tumor". A meta-analysis was conducted to estimate the pooled upstage rate (from pTa to pT1/T2), the pooled upgrade (from G1-2 to G3), the proportion of pts still in AS and the pooled AS failure rate across all studies. A random-effects model was used to derive the pooled effect sizes and the 95% confidence intervals (CIs).
RESULTS: 7 studies were included, accounting for 558 patients (pts). AS failure rate was 67% (95%CI 44-84%) and 32% of pts were still on AS (14-56%) during a median AS time of 15,6 months. Progression to worst grade or stage was observed in 19% of pts (95%CI 11-30%). Upgrade to G3 and upstage to pT1 were observed in 44% (95%CI 13.6-79.8%) and 8% (95%CI 3.9-15.9%) respectively.
CONCLUSIONS: AS for Low Grade NMIBC can be considered safe and feasible, even if only in clinical trial context. We encourage multicenters to perform randomized clinical trials to obtain data about the quality of life of pts on AS, which are scarce, and to rapidly make AS an integral part of daily urological practice as soon as possible.
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