Lookup NU author(s): Dr Danny Ruta
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Objectives: To validate the Oral Health Impact Profile (OHIP)-14 in a sample of patients attending general dental practice. Methods: Patients with pathology-free impacted wisdom teeth were recruited from six general dental practices in Tayside, Scotland, and followed for a year to assess the development of problems related to impaction. The OHIP-14 was completed at baseline and at 1-year follow-up, and analysed using three different scoring methods: a summary score, a weighted and standardized score and the total number of problems reported. Instrument reliability was measured by assessing internal consistency and test-retest reliability. Construct validity was assessed using a number of variables. Linear regression was then used to model the relationship between OHIP-14 and all significantly correlated variables. Responsiveness was measured using the standardized response mean (SRM). Adjusted R2s and SRMs were calculated for each of the three scoring methods. Estimates for the differences between adjusted R2s and the differences between SRMs were obtained with 95% confidence intervals. Results: A total of 278 and 169 patients completed the questionnaire at baseline and follow-up, respectively. Reliability - Cronbach's α coefficients ranged from 0.30 to 0.75. Alpha coefficients for all 14 items were 0.88 and 0.87 for baseline and follow-up, respectively. Test-retest coefficients ranged from 0.72 to 0.78. Validity - OHIP-14 scores were significantly correlated with number of teeth, education, main activity, the use of mouthwash, frequency of seeing a dentist, the reason for the last dental appointment, smoking, alcohol intake, pain and symptoms. Adjusted R2s ranged from 0.123 to 0.202 and there were no statistically significant differences between those for the three different scoring methods. Responsiveness - The SRMs ranged from 0.37 to 0.56 and there was a statistically significant difference between the summary scores method and the total number of problems method for symptomatic patients. Conclusions: The OHIP-14 is a valid and reliable measure of oral health-related quality of life in general dental practice and is responsive to third molar clinical change. The summary score method demonstrated performance as good as, or better than, the other methods studied. © Blackwell Munksgaard, 2006.
Author(s): Fernandes MJ, Ruta DA, Ogden GR, Pitts NB, Ogston SA
Publication type: Article
Publication status: Published
Journal: Community Dentistry and Oral Epidemiology
ISSN (print): 0301-5661
ISSN (electronic): 1600-0528
PubMed id: 16423032
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