A prognostic model for predicting urinary incontinence after robot-assisted radical prostatectomy.
BACKGROUND
The aim of this study is to develop a novel prognostic model for estimating the risk of postoperative urinary incontinence (UI) after robot-assisted radical prostatectomy (RARP).


METHODS
Participants comprised 131 men who underwent RARP at our hospital from 2011 to 2013. Cox regression analyses were performed to evaluate associations between UI and preoperative factors including filling cystometry and pressure-flow study results and magnetic resonance imaging.


RESULTS
Logistic regression analyses revealed significant associations between membranous urethral length or levator thickness and UI at 3 and 6 months. Stratification produced high (membranous urethral length < 9.5 mm or levator thickness < 9.0 mm) and low (membranous urethral length ≥ 9.5 mm and levator thickness ≥ 9.0 mm) UI risk groups. These inter-group differences in UI rate were significant.


CONCLUSIONS
We developed a novel prognostic model based on preoperative patient data that can be used for patient counselling.
Department of Urology, Tottori University Faculty of Medicine, Yonago, Japan.
Masashi
M
Honda
Department of Urology, Tottori University Faculty of Medicine, Yonago, Japan.
Bunya
B
Kawamoto
Department of Urology, Tottori University Faculty of Medicine, Yonago, Japan.
Shuichi
S
Morizane
Department of Urology, Tottori University Faculty of Medicine, Yonago, Japan.
Katsuya
K
Hikita
Department of Urology, Tottori University Faculty of Medicine, Yonago, Japan.
Kuniyasu
K
Muraoka
Department of Urology, Tottori University Faculty of Medicine, Yonago, Japan.
Takehiro
T
Sejima
Department of Urology, Tottori University Faculty of Medicine, Yonago, Japan.
Atsushi
A
Takenaka
D000368:Aged; D006801:Humans; D016015:Logistic Models; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000209:etiology*; D011237:Predictive Value of Tests; D057234:Preoperative Period; D011379:Prognosis; D016016:Proportional Hazards Models; D011468:Prostatectomy / Q000009:adverse effects* / Q000379:methods; D011471:Prostatic Neoplasms / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*; D012307:Risk Factors; D065287:Robotic Surgical Procedures / Q000009:adverse effects* / Q000379:methods; D014521:Urethra / Q000000981:diagnostic imaging; D001743:Urinary Bladder / Q000503:physiopathology; D014549:Urinary Incontinence / Q000000981:diagnostic imaging / Q000209:etiology* / Q000503:physiopathology; D014551:Urinary Tract / Q000000981:diagnostic imaging / Q000503:physiopathology
MRI; cancer; computer assisted surgery; incontinence; prostate; prostatectomy