Introduction to verification of the GOHAI instrument for measuring the oral health-related quality of life in patients with dentures using the Serbian preliminary version: A pilot study
2014
Background/Aim. Quality of life related to health should be seen as a
multidimensional concept that, in addition to the physical symptoms
associated with a disease and treatment, should include physical,
psychological and social functioning of a person. The primary objective of
this study was to use the Serbian preliminary version of the Geriatric Oral
Health Assessment Index (GOHAI) questionnaire in oder to examine the
consistency, reliability and stability, as well as an introduction to the
verification tool. Methods. The GOHAI questionnaire with 6-level Likert
scale, translated into Serbian, including the relevant oral health
characteristics (oral hygiene, required dentures, number of teeth extracted),
was filled by five specialists in prosthodontics for 30 randomly selected
respondents, before and after the dental prosthetic treatment. Subsequently,
in order to measure the reliability of the questionnaire, 27 patients were
reinterviewed. Results. The value of Cronbach's Alpha Coefficient (Crα)
before the treatment was 0.878, and after the treatment it was 0.788
confirming the internal consistency and stability of the questionnaire. The
validity of discriminatory properties of the GOHAI was confirmed by the
Spearman's correlation coefficient (r), which was highly significantly
associated with oral health characteristics, confirming the high reliability
of the measurement. The results of test-retest analysis measured by the
individual Pearson's correlation coefficient (r) were in the range of
0.34-0.97, and for the total score r was 0.927, while the Kappa coefficient
was 0.63. The correlation analysis of the GOHAI score before the treatment
showed that for 10 questions there was a statistically significant
correlation of the score with the answers to the questions, and for 6
questions Spearman’s r was ≥ 0.7. After the treatment a highly significant
correlation of the GOHAI was shown with the answers to 10 questions, while
for 5 questions the Spearman’s r was > 0.6. The GOHAI average score before
the treatment was 19.44 ± 11.12, and after the treatment 2.77 ± 3.83, where
the lower value indicates better quality of life. Conclusion. The results of
this pilot study confirm internal consistency and stability of the Serbian
preliminary version of the GOHAI questionnaire and the causal relation
between the quality of life and the characteristics of oral health of the
patients with dentures. Accordingly, instrument verification is recommended.
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