Long-term functional outcomes after robotic vs. retropubic radical prostatectomy in routine care: a 6-year follow-up of a large German health services research study.

Purpose: To compare long-term functional outcomes after robotic vs. retropubic RP for patients with localized prostate cancer in routine care.

Methods: "HAROW" was a large German noninterventional health services research study that prospectively evaluated the treatment of patients with localized prostate cancer (≤ T2c). We sent validated questionnaires to 1260 patients who underwent RP to evaluate long-term outcomes.

Results: After a median follow-up of 6.3 [interquartile range (IQR) 4.8-7.6] years, 42 (3%) patients had died. The return rate of the questionnaire was 76.8% (936/1218). The approach was robotic in 404 and retropubic in 532 patients. In the multivariate analysis, lack of postoperative radiotherapy [odds ratio (OR) 3.1], younger patient age (< 60 years: OR 2.8; 60-69 years: OR 2.1), preoperative urinary continence (OR 2.4), and higher annual hospital caseload (≥ 200 cases: OR 1.6) were independent predictors of urinary continence. The potency rate after nerve-sparing RP in preoperatively potent men was 40.5% (111/274). In the multivariate analysis, younger patient age (< 60 years: OR 17.9; 60-69 years: OR 8.0), lower oncologic risk (OR 2.8), and lack of postoperative radiotherapy (OR 2.2) were independent predictors of potency.

Conclusion: Younger age and lack of postoperative radiotherapy were associated with better urinary continence and erectile function. Additionally, a high annual caseload (≥ 200 RP/year) was associated with better urinary continence. Younger age, low or intermediated oncological risk and lack of postoperative radiotherapy were independent predictors for a trifecta outcome. The surgical approach did not affect long-term functional outcomes.