2. Department of Orthodontics and Dentofacial Orthopaedics, B.P.Koirala Institute of Health Sciences, Dharan, Nepal.
Objective: The aim of this study was to develop a reliable and valid Nepali version of Oral Health Impact Profile (OHIP) Questionnaire.
Methods: The study was carried out at B.P. Koirala Institute of Health Sciences, Dharan, Nepal, a tertiary care health centre in Eastern Nepal. It was a cross-sectional questionnaire based survey. The English version of the OHIP-14 was translated in to Nepali, then back translation was done and pre-tested and subsequently self-administered to the subjects. The data was entered into Microsoft Excel 2007 and converted into Statistical Package for Social Science version 20 (SPSS v.20) which was used for statistical analysis. Internal consisitency was the main guiding factor for reliability and was measured using Cronbach's alpha. Construct validity was tested by factorial analysis.
Results: Cronbach's alpha of the translated scale was >0.8. Corrected item-total correlation coefficients ranged from 0.22-0.65. Factorial analysis and the significant association between OHIP scores and the DMFT supports the construct validity of the instrument.
Conclusion: The translated version of the OHIP-14 questionnaire is a reliable and valid instrument to measure the oral health related quality of life (OHRQoL) in Nepalese adult population.
Keywords: Reliability, validity, OHIP-14, correlation coefficient