title: Comparison of prevalence between self-reported erectile dysfunction and erectile dysfunction as defined by five-item International Index of Erectile Function in Taiwanese men older than 40 years.
abstract: OBJECTIVE
  To conduct a cohort study in men older than 40 years in Taiwan to evaluate the prevalence of erectile dysfunction (ED) by self-report and the use of the abridged, five-item version of the International Index of Erectile Function (IIEF-5).
  
  
  METHODS
  From July to August 2003, 990 Taiwanese men older than 40 years of age completed a telephone survey designed to assess ED prevalence and sexual functioning. ED was identified through respondent self-report and investigator assessment using the IIEF-5 instrument. Data were analyzed using the analysis of variance test, t test, and chi-square test, with Yates' correction or Fisher's method.
  
  
  RESULTS
  The prevalence of self-reported ED was 13.1%, with 26.2% of this subgroup subsequently deemed to not have ED by IIEF-5 assessment. Among the subgroup of men self-reported to not have ED, 18.8% were found to have ED by IIEF-5 assessment. In total, 26.0% of respondents had ED by IIEF-5 assessment. The ED prevalence increased with age and a history of chronic illness. The frequency of sexual contact and sexual satisfaction were also reduced in the respondents with ED.
  
  
  CONCLUSIONS
  The prevalence of self-reported ED in Taiwanese men older than 40 years of age was 13.1% compared with 26.0% using the IIEF-5 assessment. Estimates of ED prevalence in the general population should not rely on self-reporting alone because it is likely to underestimate the true prevalence of ED.
authors: Shu-Tien Urology Clinic, Chung Shan Hospital, Taipei, Taiwan.
authors: Chi-Ju
authors: CJ
authors: Wu
authors: Ju-Ton
authors: JT
authors: Hsieh
authors: Johnny Shinn-Nan
authors: JS
authors: Lin
authors: Thomas I-Sheng
authors: TI
authors: Hwang
authors: Bang-Ping
authors: BP
authors: Jiann
authors: Shih-Tsung
authors: ST
authors: Huang
authors: Chii-Jye
authors: CJ
authors: Wang
authors: Shang-Sen
authors: SS
authors: Lee
authors: Han-Sun
authors: HS
authors: Chiang
authors: Kuang-Kuo
authors: KK
authors: Chen
authors: Hong-Da
authors: HD
authors: Lin
mesh_terms: D000328:Adult; D015331:Cohort Studies; D007172:Erectile Dysfunction / Q000175:diagnosis* / Q000453:epidemiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D011795:Surveys and Questionnaires; D013624:Taiwan