Abstract
Objectives
Aims were to investigate and compare the validity and reliability of Oral Health Impact Profile (OHIP) scores referencing 7-day and 1-month recall periods in international prosthodontic patients.
Material and methods
A sample of 267 patients (mean age = 54.0 years, SD = 17.2 years, 58 % women) with stable oral health-related quality of life was recruited from prosthodontic treatment centers in Croatia, Germany, Hungary, Japan, Slovenia, and Sweden. These patients completed the OHIP on two occasions using a new 7-day recall period and the traditional 1-month recall period. OHIP score validity and reliability were investigated with structural equation models (SEMs) that included OHIPpast 7 days and OHIP1 month latent factors and single indicator measures of global oral health status. The SEMs assessed measurement invariance and the relative validities of the two OHIP latent factors (representing the two recall periods).
Results
The SEMs provided cogent evidence for recall period measurement invariance for the two OHIP forms and equal validities (r = .48) with external measures of global oral health status.
Conclusion
When assessed in international prosthodontic patients, OHIP scores using the new 7-day recall period were as reliable and valid as the scores using the 1-month recall period.
Clinical relevance
Conceptual advantages make a 7-day recall period a preferred frame of reference in clinical applications of the OHIP questionnaire.
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Notes
Our previous findings [17] indicated that in addition to a strong general factor of OHRQoL, the OHIP measures four weaker group factors that describe specific aspects of oral health (Oral Function, Orofacial Pain, Orofacial Appearance, and Psychosocial Impact). It is likely that inclusion of these weaker factors into our latent variable models would have improved the recovery of all item correlations. Unfortunately, our multisite samples were not sufficiently large to enable us to rigorously evaluate these more complex latent variable models.
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Acknowledgments
Research reported in this publication was supported by the National Institute of Dental and Craniofacial Research of the National Institutes of Health under Award Number R01DE022331.
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The authors declare that there are no conflicts of interest.
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Waller, N., John, M.T., Feuerstahler, L. et al. A 7-day recall period for a clinical application of the oral health impact profile questionnaire. Clin Oral Invest 20, 91–99 (2016). https://doi.org/10.1007/s00784-015-1484-6
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DOI: https://doi.org/10.1007/s00784-015-1484-6