Reliability and validity of the Malay version of the International Index of Erectile Function (IIEF-15) in the Malaysian population

K. F. Quek, W. Y. Low, A. H. Razack, C. B. Chua, C. S. Loh

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28 Citations (Scopus)


The objective of this study was to validate the Malay version of the International Index of Erectile Function (IIEF-15) in patients with lower urinary tract symptoms. Reliability and validity was assessed by using the test-retest while Cronbach's alpha was used to assess internal consistency. Effect size was evaluated to assess the sensitivity to change in the pre-transurethral resection of the prostate (TURP) vs post-TURP. Internal consistency was excellent. A high degree of internal consistency was observed for each of the 15 items and five domains (Cronbach's alpha value = 0.56 and higher and 0.74 and higher, respectively). Test-retest correlation coefficient for the 15 items and domains scores showed no significant changes. Intraclass correlation coefficient for 15 items and domains were high (ICC = 0.59 and above). It can be concluded that the Mal-IIEF-15 is suitable, reliable, valid and sensitive to clinical change in the Malaysian population.

Original languageEnglish
Pages (from-to)310-315
Number of pages6
JournalInternational Journal of Impotence Research
Issue number4
Publication statusPublished - Aug 2002
Externally publishedYes


  • Cronbach's alpha
  • Internal consistency
  • International Index of Erectile Function (IIEF-15)
  • Intraclass correlation coefficient
  • Test-retest reliability and validity

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