BMI: Body mass index; BPH: Benign prostatic hyperplasia; TURP: Trans-urethral resection of the prostate; AUR: Acute urinary retention; UTI: Urinary tract infection; IPSS: International prostate symptom score; PVR: Postvoid residual volume; PSA: Prostate-specific antigen. This evidence concerns the gene KLK3 and urinary tract infection.