Confirmatory factor analysis of the Oral Health Impact Profile
2014 (English)In: Journal of Oral Rehabilitation, ISSN 0305-182X, E-ISSN 1365-2842, Vol. 41, no 9, 644-652 p.Article in journal (Refereed) Published
Previous exploratory analyses suggest that the Oral Health Impact Profile (OHIP) consists of four correlated dimensions and that individual differences in OHIP total scores reflect an underlying higher-order factor. The aim of this report is to corroborate these findings in the Dimensions of Oral Health-Related Quality of Life (DOQ) Project, an international study of general population subjects and prosthodontic patients. Using the projects Validation Sample (n = 5022), we conducted confirmatory factor analyses in a sample of 4993 subjects with sufficiently complete data. In particular, we compared the psychometric performance of three models: a unidimensional model, a four-factor model and a bifactor model that included one general factor and four group factors. Using model-fit criteria and factor interpretability as guides, the four-factor model was deemed best in terms of strong item loadings, model fit (RMSEA = 0.05, CFI = 0.99) and interpretability. These results corroborate our previous findings that four highly correlated factors - which we have named Oral Function, Orofacial Pain, Oro-facial Appearance and Psychosocial Impact - can be reliably extracted from the OHIP item pool. However, the good fit of the unidimensional model and the high interfactor correlations in the four-factor solution suggest that OHRQoL can also be sufficiently described with one score.
Place, publisher, year, edition, pages
Wiley: 12 months , 2014. Vol. 41, no 9, 644-652 p.
oral health-related quality of life; Oral Health Impact Profile; dimensions; factor structure; confirmatory factor analysis
IdentifiersURN: urn:nbn:se:liu:diva-119188DOI: 10.1111/joor.12191ISI: 000342799500002PubMedID: 24909797OAI: oai:DiVA.org:liu-119188DiVA: diva2:820388
Funding Agencies|National Institute of Dental and Craniofacial Research of the National Institutes of Health [R01DE022331]2015-06-122015-06-112015-07-01