World journal of urology · 2022
Impact of obesity on perioperative, functional and oncological outcomes after robotic-assisted radical prostatectomy in a high-volume center.
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Sarychev Sergey, Witt Jorn H, Wagner Christian, Oelke Matthias, Schuette Andreas, Liakos Nikolaos, Karagiotis Theodoros, Mendrek Mikolaj, Kachanov Mykyta, Graefen Markus, Vetterlein Malte W, Meyer Christian P, Tian Zhe, Leyh-Bannurah Sami-Ramzi
Аннотация
OBJECTIVE: To compare surgical, oncological and functional outcomes between obese vs. normal-weight prostate cancer (PCa) patients treated with robotic-assisted radical prostatectomy (RARP).
MATERIALS AND METHODS: We assessed 4555 consecutive RARP patients from a high-volume center 2008-2018. Analyses were restricted to normal-weight vs. obese patients (≥ 30 kg/m2). Multivariable cox regression analyses (MVA) assessed the effect of obesity on biochemical recurrence (BCR), metastatic progression (MP), erectile function and urinary continence recovery. Analyses were repeated after propensity score matching.
RESULTS: Before matching, higher rates of pathological Gleason Grade group ≥ 4 (14 vs. 18%; p = 0.004) and pT3 stage (33 vs. 35%; p = 0.016) were observed in obese patients, with similar observations for surgery time, blood loss and 30-day wound- and surgical complication rates. For normal-weight vs. obese patients, BCR- and MP-free rates were 86 vs. 85% (p = 0.97) and 97.5 vs.97.8% (p = 0.8) at 48 months. Similarly, rates of erectile function at 36 months and urinary continence at 12 months were 56 vs. 49% (p = 0.012) and 88 vs. 85% (p = 0.003), respectively. Before and after propensity score matching, obesity had no effect on BCR or MP, but a negative effect on erectile function (matched HR 0.87, 95%CI 0.76-0.99; p = 0.029) and urinary continence recovery (matched HR 0.91, 95%CI 0.84-0.98; p = 0.014).
CONCLUSIONS: Obesity did not represent a risk factor of BCR or MP after RARP despite higher rates of adverse pathological features. However, obesity was associated with higher risk of perioperative morbidity and impaired functional outcomes. Such information is integral for patient counselling. Thus, weight loss before RARP should be encouraged.
MATERIALS AND METHODS: We assessed 4555 consecutive RARP patients from a high-volume center 2008-2018. Analyses were restricted to normal-weight vs. obese patients (≥ 30 kg/m2). Multivariable cox regression analyses (MVA) assessed the effect of obesity on biochemical recurrence (BCR), metastatic progression (MP), erectile function and urinary continence recovery. Analyses were repeated after propensity score matching.
RESULTS: Before matching, higher rates of pathological Gleason Grade group ≥ 4 (14 vs. 18%; p = 0.004) and pT3 stage (33 vs. 35%; p = 0.016) were observed in obese patients, with similar observations for surgery time, blood loss and 30-day wound- and surgical complication rates. For normal-weight vs. obese patients, BCR- and MP-free rates were 86 vs. 85% (p = 0.97) and 97.5 vs.97.8% (p = 0.8) at 48 months. Similarly, rates of erectile function at 36 months and urinary continence at 12 months were 56 vs. 49% (p = 0.012) and 88 vs. 85% (p = 0.003), respectively. Before and after propensity score matching, obesity had no effect on BCR or MP, but a negative effect on erectile function (matched HR 0.87, 95%CI 0.76-0.99; p = 0.029) and urinary continence recovery (matched HR 0.91, 95%CI 0.84-0.98; p = 0.014).
CONCLUSIONS: Obesity did not represent a risk factor of BCR or MP after RARP despite higher rates of adverse pathological features. However, obesity was associated with higher risk of perioperative morbidity and impaired functional outcomes. Such information is integral for patient counselling. Thus, weight loss before RARP should be encouraged.