title: The relationship of the International Prostate Symptom Score and objective parameters for diagnosing bladder outlet obstruction. Part I: when statistics fail.
abstract: OBJECTIVE
  We evaluated the International Prostate Symptom Score and correlated it with objective means of determining bladder outlet obstruction.
  
  
  METHODS
  Beginning in May 1996, 460 men 41 to 88 years old (mean age plus or minus standard deviation 60.4 +/- 9.4) were prospectively included in this study. Symptoms were evaluated using the International Prostate Symptom Score, and digital rectal examination, outpatient cystoscopy, prostate specific antigen determination and transrectal ultrasound were done. Urodynamic evaluation included uroflowmetry, filling cystometry and pressure flow study.
  
  
  RESULTS
  Linear regression was done to correlate scores with measurable parameters. We noted no correlation of the total, obstructive symptoms or irritative symptoms score with objective parameters, including the average and maximum flow rate, post-void residual urine, prostate size and Schäfer grade.
  
  
  CONCLUSIONS
  Prostatic symptom scores are qualitative. Using them to quantify the degree of obstruction or evaluate therapy is questionable.
authors: Urology and Nephrology Center, Mansoura, Egypt, and Urology Department, University Hospital Nijmegen, Nijmegen, The Netherlands.
authors: B S
authors: BS
authors: Wadie
authors: E H
authors: EH
authors: Ibrahim
authors: J J
authors: JJ
authors: de la Rosette
authors: M A
authors: MA
authors: Gomha
authors: M A
authors: MA
authors: Ghoneim
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D006801:Humans; D016014:Linear Models; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D011470:Prostatic Hyperplasia / Q000150:complications* / Q000175:diagnosis / Q000453:epidemiology; D012720:Severity of Illness Index; D001748:Urinary Bladder Neck Obstruction / Q000175:diagnosis* / Q000453:epidemiology / Q000209:etiology