Validation of a Persian version of the OIDP index

Mojtaba Dorri*, Aubrey Sheiham, Georgios Tsakos

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

30 Citations (Scopus)
7 Downloads (Pure)


Background. Measuring the impacts of oral conditions on quality of life is an important part of oral health needs assessment. For this purpose a variety of oral health-related quality of life instruments have been developed. To use a scale in a new context or with a different groups of people, it is necessary to re-establish its psychometric properties. The objectives of this study are to develop and test the reliability and validity of the Persian version of Oral Impacts on Daily Performances (OIDP) index. Methods. The Persian version of OIDP index was developed through a linguistic translation exercise. The psychometric properties of the Persian version of OIDP were evaluated in terms of face, content, construct and criterion validity in addition to internal and test-retest reliability. A convenience sample of 285 working adults aged 20-50 living in Mashad was recruited (91% response rate) to evaluate the Persian version. Results. The Persian version of OIDP had excellent validity and reliability charactersitics. Weighted Kappa was 0.91. Cronbachs alpha coefficient was 0.79. The index showed significant associations with self-rated oral and general health status, as well as perceived dental treatment needs, satisfaction with mouth and prevalence of pain in mouth (P < 0.001). 64.9% of subjects had an oral impact on their daily performances. The most prevalent performance affected was eating, followed by major work or role and sleeping. Conclusion. The Persian version of OIDP index is a valid and reliable measure for use in 20 to 50 year old working Iranians.

Original languageEnglish
Article number2
Number of pages7
JournalBMC Oral Health
Publication statusPublished - 23 Feb 2007


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