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General oral health assessment index: A new evaluation proposal
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Advisor(s)
Abstract(s)
Objectives: To validity the General Oral Health Assessment Index (GOHAI) among
adults who sought dental care and to present a new proposal for calculating scores on
self-perception
of oral health.
Background: There is no study that presents a GOHAI scores using weight of the
items.
Materials and Methods: The one-factor
model, the three-factor
model (physical function,
psychosocial/psychological function and pain/discomfort) and the second-order
hierarchical model (SOHM) were evaluated from confirmatory factor analysis (λ, χ2/df,
CFI,GFI and RMSEA). The reliability (CR,α) was estimated. Concurrent validity was assessed
using the Oral Health Impact Profile (OHIP-14).
The invariance of the models
was estimated in independent samples. The calculation of an overall score using the
factor scores was proposed to obtain the overall weighted scores. These overall
weighted scores were compared to the scores estimated as the simple arithmetic
mean (overall unweighted scores) using a repeated measures analysis of variance.
Results: A total of 1000 individuals participated (74.1% female; age: 40.7
(SD=14.3) years). Three items of the GOHAI were excluded (λ<0.40). The one-factor
model (λ=0.40-0.77;
χ2/df=6.291; CFI=0.947; GFI=0.960; RMSEA=0.073) and the
three-factor
model (λ=0.40-0.78;
χ2/df=8.321; CFI=0.932; GFI=0.954; RMSEA=0.086)
each presented an adequate fit. Reliability was adequate (one-factor:
CR=0.83/
α=0.83; three-factor:
CR=0.53-0.76/
α=0.53-0.73),
with the exception of the pain/discomfort
factor. The GOHAI was invariant in independent samples, and the concurrent
validity was adequate. The overall unweighted scores overestimated self-perceptions
of oral health when compared with the weighted scores.
Conclusion: Both the one-factor
and three-factor
models of the GOHAI were found to
be valid, reliable and invariant for the sample after the exclusion of three items. The
use of overall weighted scores is recommended for calculating the score of self-perception
of oral health.
Description
Keywords
Dentistry Psychometrics Scales Validation studies
Citation
Gerodontology, 1-9. Doi:10.1111/ger.12270
Publisher
Wiley