Marc Zanaty1,2,3, Mansour Alnazari1,2,3, Khaled Ajib1,2,3, Kelsey Lawson1, Mounsif Azizi1, Emad Rajih1, Abdullah Alenizi1, Pierre-Alain Hueber1, Côme Tolmier1, Malek Meskawi1, Fred Saad1, Raisa S Pompe1, Pierre I Karakiewicz1, Assaad El-Hakim1,2, Kevin C Zorn4,5,6. 1. Division of Urology, Department of Surgery, Montreal University, Montreal, Canada. 2. Division of Robotic Urology, Department of Surgery, "Hôpital Sacré Coeur de Montréal", Montreal, Canada. 3. Division of Robotic Urology, Department of Surgery, "Hôpital Saint-Luc", Montreal, Canada. 4. Division of Urology, Department of Surgery, Montreal University, Montreal, Canada. zorn.chumurology@gmail.com. 5. Division of Robotic Urology, Department of Surgery, "Hôpital Sacré Coeur de Montréal", Montreal, Canada. zorn.chumurology@gmail.com. 6. Division of Robotic Urology, Department of Surgery, "Hôpital Saint-Luc", Montreal, Canada. zorn.chumurology@gmail.com.
Abstract
AIM: We sought to explore the impact of surgical wait time (SWT) to robot-assisted radical prostatectomy (RARP) on biochemical recurrence (BCR). METHOD: Retrospective review of a prospectively collected database between 2006 and 2015 was conducted on all RARP cases. SWT was defined as period from prostate biopsy to surgery. Primary outcome was the impact on BCR, which was defined as two consecutive PSA ≥ 0.2 ng/dl, or salvage external beam radiation therapy and/or salvage androgen deprivation therapy. Patients were stratified according to D'Amico risk categories. Univariable analysis (UVA) and multivariable analyses (MVA) with a Cox proportional hazards regression model were used to evaluate the effect of SWT and other predictive factors on BCR, in each D'Amico risk group and on the overall collective sample. RESULTS: Patients eligible for analysis were 619. Mean SWT was 153, 169, 150, and 125 days, for overall, low-, intermediate-, and high-risk patients, respectively. Multivariate analysis on the overall cohort did not show a significant relation between SWT and BCR. On subgroup analysis of D'Amico risk group, SWT was positively correlated to BCR for high-risk group (p = 0.001). On threshold analysis, cut-off was found to be 90 days. SWT did not significantly affect BCR on UVA and MVA in the low- and intermediate-risk groups. CONCLUSION: Increased delay to surgery could affect the BCR, as there was a positive association in high-risk group. Further studies with longer follow-up are necessary to assess the impact of wait time on BCR, cancer specific survival and overall survival.
AIM: We sought to explore the impact of surgical wait time (SWT) to robot-assisted radical prostatectomy (RARP) on biochemical recurrence (BCR). METHOD: Retrospective review of a prospectively collected database between 2006 and 2015 was conducted on all RARP cases. SWT was defined as period from prostate biopsy to surgery. Primary outcome was the impact on BCR, which was defined as two consecutive PSA ≥ 0.2 ng/dl, or salvage external beam radiation therapy and/or salvage androgen deprivation therapy. Patients were stratified according to D'Amico risk categories. Univariable analysis (UVA) and multivariable analyses (MVA) with a Cox proportional hazards regression model were used to evaluate the effect of SWT and other predictive factors on BCR, in each D'Amico risk group and on the overall collective sample. RESULTS:Patients eligible for analysis were 619. Mean SWT was 153, 169, 150, and 125 days, for overall, low-, intermediate-, and high-risk patients, respectively. Multivariate analysis on the overall cohort did not show a significant relation between SWT and BCR. On subgroup analysis of D'Amico risk group, SWT was positively correlated to BCR for high-risk group (p = 0.001). On threshold analysis, cut-off was found to be 90 days. SWT did not significantly affect BCR on UVA and MVA in the low- and intermediate-risk groups. CONCLUSION: Increased delay to surgery could affect the BCR, as there was a positive association in high-risk group. Further studies with longer follow-up are necessary to assess the impact of wait time on BCR, cancer specific survival and overall survival.
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