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Prostate

Will I be incontinent after prostate cancer surgery?

Much of the risk is measurable before the operation, and one of the strongest predictors is a length on the MRI that was taken anyway.

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Answer

The risk is partly predictable before surgery: a meta-analysis of 48 studies and 12,620 men found that incontinence within three months of robot-assisted radical prostatectomy was independently predicted by age (odds ratio 1.04 per year), membranous urethral length on preoperative MRI (0.83 per millimetre, longer being protective), International Prostate Symptom Score (1.03 per point), body mass index and prostate volume.

Key takeaways

  • A systematic review and meta-analysis of 48 studies covering 12,620 men examined which factors predict urinary incontinence after robot-assisted radical prostatectomy.
  • Within three months, independent predictors were age (odds ratio 1.04 per year), membranous urethral length (0.83 per millimetre), International Prostate Symptom Score (1.03 per point), body mass index and prostate volume.
  • Between three and twelve months, age (1.05 per year), membranous urethral length (0.81 per millimetre) and symptom score (1.023 per point) remained independent predictors.
  • Membranous urethral length is measured on the MRI already performed before surgery, and a longer urethra was protective — the only listed factor whose effect runs in that direction.
  • A separate meta-analysis of 13 studies and 22,183 patients found NeuroSAFE, an intraoperative frozen-section technique, associated with better continence recovery (odds ratio 1.36) and better erectile function (2.00), with no difference in biochemical recurrence.
  • Both reviews reported serious limitations: high risk of bias in study participation and confounding in the incontinence review, and substantial heterogeneity with mostly non-randomised studies in the NeuroSAFE review.
  • In the ProtecT trial, radical prostatectomy had the greatest negative effect on urinary continence of the three management options, while radiotherapy had little effect on continence.

Urinary leakage after prostate cancer surgery is the complication men ask about most and are quoted least precisely. The useful finding of the last few years is that a meaningful part of the risk can be estimated before the decision is made, from information the hospital already holds.

What predicts it

A systematic review and meta-analysis published in the Journal of Robotic Surgery pooled 48 studies covering 12,620 men who had robot-assisted radical prostatectomy, and separated the early period from the later one.

Independent predictors of incontinence after robot-assisted radical prostatectomy
FactorWithin 3 months3 to 12 months
Age, per yearOR 1.04OR 1.05
Membranous urethral length, per mmOR 0.83OR 0.81
International Prostate Symptom Score, per pointOR 1.03OR 1.023
Body mass indexsignificant—
Prostate volumesignificant—

Membranous urethral length is the segment of urethra below the prostate. It is measured on the MRI that is done before surgery anyway, and its odds ratio below 1 means the effect runs the other way from everything else on the list: each additional millimetre is associated with lower odds of incontinence.

What the surgeon can change

A separate meta-analysis of 13 studies and 22,183 patients examined NeuroSAFE, a technique in which frozen sections are examined during the operation so nerve-sparing can be extended where the margin is clear. It was associated with better continence recovery (odds ratio 1.36), better erectile function (2.00) and fewer positive surgical margins (0.73), with no difference in biochemical recurrence.

Both reviews are honest about their limits, and so should any reading of them be. The incontinence review's own quality assessment found a high risk of bias in study participation and confounding. The NeuroSAFE review reported substantial heterogeneity, with most included studies non-randomised and at serious risk of bias.

How this compares with the alternatives

In ProtecT, the randomised trial that followed 1,643 men and measured patient-reported function for six years, radical prostatectomy had the greatest negative effect on urinary continence and on sexual function of the three options. Radiotherapy had little effect on continence — its distinctive cost fell on the bowel instead.

That is the trade being made. Incontinence is not an argument against surgery; it is the specific price surgery charges, and the reason the alternatives are not simply worse versions of it.

Sources

  1. 1

    Huang H, Cai K

    Prognostic factors for urinary incontinence after robot-assisted radical prostatectomy: a systematic review and meta-analysis

    Journal of Robotic Surgery 2025;19(1):628

    doi:10.1007/s11701-025-02803-6 · PMID:40987992

    https://doi.org/10.1007/s11701-025-02803-6
  2. 2

    Suartz CV, Micheleto JPC, Condotta BE, Schumacher LB, Galhardo KA, Azevedo MFD, et al.

    NeuroSAFE-guided robot-assisted radical prostatectomy versus standard RARP: systematic review and meta-analysis of comparative studies

    Journal of Robotic Surgery 2026;20(1):496

    doi:10.1007/s11701-026-03390-w · PMID:42126466

    https://doi.org/10.1007/s11701-026-03390-w
  3. 3

    Donovan JL, Hamdy FC, Lane JA, Mason M, Metcalfe C, Walsh E, et al.

    Patient-reported outcomes after monitoring, surgery, or radiotherapy for prostate cancer

    New England Journal of Medicine 2016;375(15):1425-1437

    doi:10.1056/nejmoa1606221 · PMID:27626365

    https://doi.org/10.1056/nejmoa1606221