title: Clinical features of supervoiders who suffer from lower urinary tract symptoms: a propensity score-matching study.
abstract: OBJECTIVE
  To evaluate the clinical characteristics of patients with maximal urine flow rate (Q max) ≥ 25 ml/s complaining of lower urinary tract symptoms (LUTS), using propensity score-matching analysis to compare with the control group.
  
  
  METHODS
  Medical records from a prospectively maintained database for first visit male patients with LUTS/benign prostatic hyperplasia between 2010 and 2012 were used to select 818 patients. Of these patients, 68 men with Q max ≥ 25 ml/s were defined as the supervoider group, and 68 patients were selected for the control group using propensity scores, which were calculated for each patient using multivariable logistic regression model based on the following covariates: age, prostate volume, voided urine volume, and post-voided residual volume. International Prostate Symptom Score (IPSS), quality of life score, and Overactive Bladder Symptom Score (OABSS) were also analyzed.
  
  
  RESULTS
  Mean Q max was 30.82 ± 5.13 in supervoiders and 15.95 ± 4.88 ml/s in controls (p < 0.001). There were statistical differences in IPSS between supervoiders and controls (12.63 ± 5.81 vs. 16.13 ± 6.90; p = 0.002). Although the IPSS voiding symptom sub-score in supervoiders was lower than controls (5.09 ± 3.35 vs. 7.40 ± 4.00; p < 0.001), there were no significant differences in storage symptom and post-micturitional symptom sub-scores. In OABSS and subdomain scores for frequency, nocturia, and urgency, there were no significant differences between the groups. However, the urge incontinence subdomain score was significantly higher in supervoiders versus controls (0.69 ± 1.26 vs. 0.18 ± 0.52; p = 0.003).
  
  
  CONCLUSIONS
  Supervoiders experience comparable levels of storage and post-micturition symptoms, but display more severe urge incontinence despite milder voiding symptoms and better uroflowmetric measurements than propensity score-matched controls.
authors.affiliation: Department of Urology, Severance Hospital, Urological Science Institute, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, 120-752, Korea.
authors.forename: Joo Yong
authors.initials: JY
authors.lastname: Lee
authors.forename: Yoon Soo
authors.initials: YS
authors.lastname: Hah
authors.forename: Dae Hun
authors.initials: DH
authors.lastname: Lee
authors.forename: Woo Jin
authors.initials: WJ
authors.lastname: Bang
authors.forename: Won Sik
authors.initials: WS
authors.lastname: Ham
authors.forename: Seung Wook
authors.initials: SW
authors.lastname: Lee
authors.forename: Kang Su
authors.initials: KS
authors.lastname: Cho
mesh_terms: D000328:Adult; D000368:Aged; D016022:Case-Control Studies; D015897:Comorbidity; D006801:Humans; D016015:Logistic Models; D059411:Lower Urinary Tract Symptoms / Q000453:epidemiology / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D011446:Prospective Studies; D011470:Prostatic Hyperplasia / Q000453:epidemiology / Q000503:physiopathology; D012189:Retrospective Studies; D053201:Urinary Bladder, Overactive / Q000453:epidemiology / Q000503:physiopathology*; D014555:Urination Disorders / Q000453:epidemiology / Q000503:physiopathology*