Longitudinal, 5‐year long‐term outcomes for urinary continence and quality of life after robot‐assisted radical prostatectomy in Japanese patients

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Abstract
Objectives: The aim of this study was to investigate the longitudinal 5‐year long‐term outcomes for urinary continence and quality of life (QOL) after robot‐assisted radical prostatectomy (RARP), particularly nerve‐sparing.Methods: Among patients who underwent RARP between October 2010 and October 2015, postoperative urinary symptoms were retrospectively examined using the International Prostate Symptom Score (IPSS), International Consultation on Incontinence Questionnaire‐Short Form (ICIQ‐SF), QOL index, and number of pads used. Patients were divided into nerve‐sparing and non‐nerve‐sparing groups, and all data were evaluated before and at 1, 3, 6, 12, 24, 36, 48, and 60 months after surgery.Results: After propensity score matching, 47 patients each were included in the two groups. No significant difference in the IPSS or QOL index was seen between groups. The IPSS and QOL index showed an increase in the first month after RARP, but at 6 months, values were lower than preoperative levels and then slowly improved. Pad‐free rates at 5 years after surgery were 93.6% and 80.1% in the nerve‐sparing and non‐nerve‐sparing groups, respectively (P = .029). ICIQ‐SF scores were significantly improved in the nerve‐sparing compared with the non‐nerve‐sparing group at 1, 3, and 6 months after surgery. After 12 months, no significant changes were identified until 60 months.Conclusions: In this study, nerve‐sparing had a strong impact on urinary continence in the early postoperative period. After 12 months, urinary continence remained stable until 60 months.

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