The performance properties of the International Index of Erectile Function (IIEF-15) in assessing erectile dysfunction in patients with lower urinary tract symptoms

Kia Fatt Quek, W. Y. Low, A. H. Razack, C. B. Chua, C. S. Loh, N. Dublin

Research output: Contribution to journalArticleResearchpeer-review

1 Citation (Scopus)


To validate the International Index of Erectile Function (IIEF-15) in Malaysian population. Reliability and internal consistency were evaluated using the test-retest method and Cronbach's alpha. Sensitivity to change was expressed as the effect size index. Internal consistency was excellent (Cronbach's alpha value = 0.75 to 0.90) Test-retest correlation coefficient and intraclass correlation coefficient were highly highly significant (ICC = 0.75 and above) and a high degree of specificity was observed. The IIEF-15 is suitable, reliable, valid and sensitive to clinical change in the Malaysian population.

Original languageEnglish
Pages (from-to)445-453
Number of pages9
JournalMedical Journal of Malaysia
Issue number4
Publication statusPublished - Dec 2002
Externally publishedYes


  • Cronbach's alpha
  • Internal consistency
  • International Index of Erectile Function
  • Intraclass correlation coefficient
  • Test reliability and validity

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