title: α1-Blockers Improve Benign Prostatic Obstruction in Men with Lower Urinary Tract Symptoms: A Systematic Review and Meta-analysis of Urodynamic Studies.
abstract: The urodynamic outcomes for α1-blockers (ABs) treatment in patients with lower urinary tract symptoms related to benign prostatic enlargement (LUTS/BPE) is a matter of debate.
  
  
  
  To perform a systematic review and meta-analysis of studies evaluating the ABs urodynamic outcomes in patients with LUTS/BPE. The primary endpoint was variation in bladder outlet obstruction index (BOOI). Secondary endpoints were the maximum urinary flow rate (Qmax) and detrusor pressure at Qmax (PdetQmax). A meta-analysis of placebo-controlled randomized clinical trials (RCTs) was performed to compare ABs with placebo.
  
  
  
  A systematic review of PubMed/Medline, ISI Web of Knowledge, and Scopus databases was performed in May 2015. Seventeen studies were selected for inclusion.
  
  
  
  The overall pooled data showed a mean BOOI change of -14.19 (p<0.0001), a mean PdetQmax change of -11. 39cm H2O (p<0.0001), and a mean Qmax improvement of 2.27ml/s (p<0.0001). Subgroup analysis showed a mean BOOI change of -14.88 (p=0.01) for alfuzosin, -19.41 (p=0.01) for doxazosin, -16.47 (p<0.0001) for naftopidil, -30.45 (p<0.0001) for silodosin, -14.27 (p=0.002) for tamsulosin, and -6.69 (p=0.005) for terazosin. Subanalysis of RCTs containing a placebo arm showed a significant improvement in BOOI in patients undergoing ABs treatment. Meta-regression revealed a significant positive association between the percentage of patients with obstruction at baseline and the improvement in BOOI after treatment with ABs.
  
  
  
  ABs improve BOOI in patients with LUTS/BPE mainly by reducing PdetQmax, and this effect is higher in patients presenting with urodynamic obstruction at baseline. The free Qmax variation underestimates the real effect of ABs on benign prostatic obstruction.
  
  
  
  Results of this meta-analysis suggest that α1-blockers objectively improve urinary voiding function in patients with benign prostatic obstruction.
authors.affiliation: Urology Unit, Department of Neurosciences, Science of Reproduction and Odontostomatology, University of Naples Federico II, Naples, Italy. Electronic address: ferdinando-fusco@libero.it.
authors.forename: Ferdinando
authors.initials: F
authors.lastname: Fusco
authors.affiliation: Urology Unit, Department of Neurosciences, Science of Reproduction and Odontostomatology, University of Naples Federico II, Naples, Italy.
authors.forename: Alessandro
authors.initials: A
authors.lastname: Palmieri
authors.affiliation: Urology Unit, Department of Experimental and Clinical Medical Sciences, University of Udine, Udine, Italy; Urology Unit, Academic Hospital Santa Maria della Misericordia, Udine, Italy.
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Ficarra
authors.affiliation: Urology Unit, Academic Hospital Santa Maria della Misericordia, Udine, Italy.
authors.forename: Gianluca
authors.initials: G
authors.lastname: Giannarini
authors.affiliation: Urology Unit, Department of Surgery, Oncology, and Gastroenterology, University of Padua, Padua, Italy.
authors.forename: Giacomo
authors.initials: G
authors.lastname: Novara
authors.affiliation: Urology Unit, Department of Neurosciences, Science of Reproduction and Odontostomatology, University of Naples Federico II, Naples, Italy.
authors.forename: Nicola
authors.initials: N
authors.lastname: Longo
authors.affiliation: Urology Unit, Department of Neurosciences, Science of Reproduction and Odontostomatology, University of Naples Federico II, Naples, Italy.
authors.forename: Paolo
authors.initials: P
authors.lastname: Verze
authors.affiliation: Urology Unit, Buon Consiglio Fatebenefratelli Hospital, Naples, Italy.
authors.forename: Massimiliano
authors.initials: M
authors.lastname: Creta
authors.affiliation: Urology Unit, Department of Neurosciences, Science of Reproduction and Odontostomatology, University of Naples Federico II, Naples, Italy.
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Mirone
mesh_terms: D058668:Adrenergic alpha-1 Receptor Antagonists / Q000494:pharmacology / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D017292:Doxazosin / Q000627:therapeutic use; D006801:Humans; D007211:Indoles / Q000627:therapeutic use; D008297:Male; D009281:Naphthalenes / Q000627:therapeutic use; D010879:Piperazines / Q000627:therapeutic use; D011224:Prazosin / Q000031:analogs & derivatives / Q000627:therapeutic use; D053448:Prostatism / Q000188:drug therapy*; D011799:Quinazolines / Q000627:therapeutic use; D012720:Severity of Illness Index; D013449:Sulfonamides / Q000627:therapeutic use; D000077409:Tamsulosin; D014563:Urodynamics / Q000187:drug effects
chemical_list: D058668:Adrenergic alpha-1 Receptor Antagonists; D007211:Indoles; D009281:Naphthalenes; D010879:Piperazines; D011799:Quinazolines; D013449:Sulfonamides; C041226:Terazosin; C047638:alfuzosin; C095285:silodosin; D000077409:Tamsulosin; D017292:Doxazosin; C064357:naftopidil; D011224:Prazosin
keywords: Benign prostatic hyperplasia; Benign prostatic obstruction; Bladder outlet obstruction index; Lower urinary tract symptoms; Meta-analysis; Urodynamics; α1-Blockers