The Effects of Preoperative Bowel Function on Lower Urinary Tract Symptoms After Holmium Laser Enucleation of Prostate (HoLEP): A Prospective Study

Background/Objectives: Variations in urinary symptom improvement after benign prostatic hyperplasia (BPH) surgery remain incompletely characterized. Preoperative factors, including bowel dysfunction, may influence postoperative recovery. We evaluated the association between baseline bowel function and urinary outcomes after holmium laser enucleation of the prostate (HoLEP), hypothesizing that worse baseline constipation would be associated with poorer outcomes. Methods: A prospective cohort study of patients undergoing HoLEP by a single surgeon at a high-volume center (December 2023–September 2024) was performed. Patients with neurogenic bladders, bowel disorders, or diabetes mellitus were excluded. Baseline bowel function was assessed using the Constipation Scoring System (CSS) and Vaizey Incontinence Score (VIS). The primary outcomes were 3-month changes in International Prostate Symptom Score (IPSS) and Michigan Incontinence Severity Index (MISI). Associations were evaluated using Spearman correlation and multivariable linear regression. Results: Among 102 patients (median age of 71.6 years), 81 (79.4%) completed follow-up. The median prostate size was 90.5 cc, and 50% had prior urinary retention. The baseline CSS and VIS were low. IPSS, quality of life, and MISI bother improved postoperatively, while MISI severity showed minimal change. Higher CSS correlated with higher VIS (p < 0.001). Baseline CSS and VIS were not associated with changes in IPSS, quality-of-life (QoL), or MISI bother. Baseline VIS was associated with modest improvement in MISI severity (β −1.14, p = 0.01). Conclusions: Baseline bowel function was not associated with urinary symptom improvement after HoLEP. However, preoperative fecal incontinence was associated with improvement in urinary incontinence severity.