We collected data related to International Prostate Symptom Score (IPSS), maximum urine flow rate (Qmax), postvoid residual volume (PVR), prostate-specific-antigen (PSA), prostate volume, Sexual Health Inventory For Men (SHIM), and perioperative complications; such as transurethral resection syndrome, bleeding, blood transfusion, clot evacuation, urinary retention, urinary tract infection (UTI), irritative symptoms, urinary incontinence, erectile dysfunction (ED), retrograde ejaculation, urethral stricture (US), and bladder neck stenosis (BNS). This evidence concerns the gene KLK3 and urinary tract infection.