%0 Journal Article %T Validation of a Persian version of the OIDP index %A Mojtaba Dorri %A Aubrey Sheiham %A Georgios Tsakos %J BMC Oral Health %D 2007 %I BioMed Central %R 10.1186/1472-6831-7-2 %X 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¨C50 living in Mashad was recruited (91% response rate) to evaluate the Persian version.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.The Persian version of OIDP index is a valid and reliable measure for use in 20 to 50 year old working Iranians.Measuring the impact of oral conditions on quality of life is an important part of assessing oral health. It is now recognised that there are serious limitations in solely using the clinical normative assessments for the measurement of oral health status and needs. Clinical measures do not consider the individual's perceived health status or perceived needs [1]. Health is no longer defined in terms of illness and disease, but concepts have been broadened to take into account physical, psychological and social aspects of well-being [2]. Hence, measures of health status, which more accurately reflect its multi-dimensional character, have been advocated [3]. These measures, which assess "the extent to which oral conditions disrupt normal social role functioning and lead to major changes in behaviour", are known as socio-dental indicators or oral health-related quality of life measures (OHRQoL) [4-7].A variety of oral health-related quality of life i %U http://www.biomedcentral.com/1472-6831/7/2