Resumo

MORAL DE LA RUBIA, José  e  RODRIGUEZ FRANCO, Norma Idalia. Cross-validation of the Oral Health Impact Profile applied to periodontal disease. Nova scientia [online]. 2017, vol.9, n.18, pp.486-514. ISSN 2007-0705.  https://doi.org/10.21640/ns.v9i18.850.

The Oral Health Impact Profile (OHIP-14) is the most commonly used instrument to evaluate the effectiveness of dental treatments. In order to elucidate its factor structure and establish the cross-validity of the scale applied to periodontal disease (OHIP-14-PD), this study aims to: 1) explore the factor structure of the OHIP-14-PD, and 2) contrast invariance of the models proposed for the OHIP-14 and of those derived from exploratory factor analysis (EFA) across a general population sample (GPS) and a dental clinic sample (DCS). The OHIP-14-PD was applied to 249 adult patients seeking dental care and 256 general population adults from Monterrey, Mexico. The EFA revealed one-, two- and three-factor models. The proposed hierarchical models yielded inadmissible solutions. We conclude that the one-factor model had the best properties, but the two-factor model (physical impact [items from 1 to 7] and psychosocial [items from 8 to 14]) also was valid. The two models were invariant at measurement weights, but not at the variances of factors and residuals. In both models, the fit improved with the inclusion of the correlation between the residuals of items 5 and 6.

Palavras-chave : confirmatory factor analysis; cross validity; convergent validity; discriminant validity, dental clinic.