title: Low incidence of acute urinary retention in the general male population: the triumph project.
abstract: OBJECTIVE
  To describe the incidence of acute urinary retention (AUR) in the general male population and in a population of men newly diagnosed with lower urinary tract symptoms suggestive of BPH (LUTS/BPH).
  
  
  METHODS
  We performed a retrospective cohort study in the Integrated Primary Care Information (IPCI) database, a GP research database in The Netherlands, during the period 1995-2000. All males, > or =45 years, without a history of AUR or radical cystectomy were included in the study. In addition, we followed a sub-cohort of men, newly diagnosed with LUTS/BPH. AUR was defined as the sudden inability to urinate, requiring catheterization.
  
  
  RESULTS
  Amongst 56,958 males with a mean follow-up of 2.8 years, 344 AUR cases occurred (incidence rate 2.2/1000 man-years) of whom more than 40% were precipitated. AUR was the first symptom of LUTS/BPH in 73 (49%) of the 149 AUR cases that occurred in men newly diagnosed with LUTS/BPH. The risk of AUR was 11-fold higher in patients newly diagnosed with LUTS/BPH (RR 11.5; 95%CI: 8.4-15.6) with an overall incidence rate of 18.3/1000 man-years (95%CI: 14.5-22.8).
  
  
  CONCLUSIONS
  The incidence rate of AUR is low in the general population but substantial in a population of men newly diagnosed with LUTS/BPH. The incidence rate increases with age and AUR is precipitated in approximately 40% of all cases. Within the LUTS/BPH cohort, AUR is the first presenting symptom of BPH in 50% of all AUR cases.
authors.affiliation: Department of Medical Informatics, Erasmus MC, PO Box 1738, 3000 DR Rotterdam, The Netherlands. k.verhamme@erasmusmc.nl
authors.forename: K M C
authors.initials: KM
authors.lastname: Verhamme
authors.forename: J P
authors.initials: JP
authors.lastname: Dieleman
authors.forename: M A M
authors.initials: MA
authors.lastname: van Wijk
authors.forename: J L H R
authors.initials: JL
authors.lastname: Bosch
authors.forename: B H Ch
authors.initials: BH
authors.lastname: Stricker
authors.forename: M C J M
authors.initials: MC
authors.lastname: Sturkenboom
mesh_terms: D000208:Acute Disease; D000368:Aged; D000369:Aged, 80 and over; D015331:Cohort Studies; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D016055:Urinary Retention / Q000453:epidemiology*