title: The development of erectile dysfunction in men treated for prostate cancer.
abstract: OBJECTIVE
  Erectile dysfunction is a common side effect in men treated for prostate cancer. Previously published studies document the incidence of erectile dysfunction in men treated for prostate cancer to be between 20% and 88%. To our knowledge a prospective evaluation focused on the development of erectile dysfunction in men treated for prostate cancer has not elucidated components of its chronology or risk factors.
  
  
  METHODS
  A centralized prospective database of 2,956 patients diagnosed with prostate cancer at a single institution was studied in regard to pretreatment and posttreatment erectile dysfunction. Of these 2,956 patients 802 had sufficient information regarding erectile function and comprise our study population. Factors analyzed in regard to treatment and erectile dysfunction include treatment modality, that is radical prostatectomy, external beam radiation therapy and watchful waiting, and ethnicity, patient age, clinical stage and tumor histological grade.
  
  
  RESULTS
  No significant difference was noted in the posttreatment erectile function between patients treated with radical prostatectomy or external beam radiation (10% versus 15%). Patients selecting watchful waiting had the lowest risk of erectile dysfunction. Clinical stage and race were significant predictors for the development of erectile dysfunction in the watchful waiting and external beam radiation treatment groups.
  
  
  CONCLUSIONS
  Erectile dysfunction develops in greater than 80% of patients treated for prostate cancer. External beam radiation has the same risk for erectile dysfunction as radical prostatectomy.
authors.affiliation: Urology Service, Department of Surgery, Walter Reed Army Medical Center, Washington, D.C., USA.
authors.forename: T
authors.initials: T
authors.lastname: Siegel
authors.forename: J W
authors.initials: JW
authors.lastname: Moul
authors.forename: M
authors.initials: M
authors.lastname: Spevak
authors.forename: W G
authors.initials: WG
authors.lastname: Alvord
authors.forename: R A
authors.initials: RA
authors.lastname: Costabile
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D007172:Erectile Dysfunction / Q000453:epidemiology / Q000209:etiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D011471:Prostatic Neoplasms / Q000628:therapy*