Abstract
BackgroundDemand for complete denture treatment is expected to rise over several decades. However, to date, no questionnaire on complete dentures, as evaluated by edentulous patients, has been shown to be reliable and valid. This study sought to assess the reliability and validity of Patient’s Denture Assessment (PDA), which provides a multidimensional evaluation of dentures among edentulous patients.MethodsPatients, who had new complete dentures fabricated at the University Hospital of Dentistry, Tokyo Medical and Dental University through 2009 to 2010, were enrolled. The reliability of the PDA was determined by examining internal consistency and test-retest reliability. Internal consistency for all of the question items and the six subscales was measured using Cronbach’s α and average inter-item correlation coefficients among 93 participants. For 33 of these participants, test-retest reliability was determined at a 2 month-interval using the interclass correlation coefficients (ICCs) and 95% confidence interval for the summary scores and the six subscale scores. The PDA was validated in 93 participants by examining the difference in the summary score and the six subscale scores of the PDA before and after replacement with new dentures by the paired t-test. Ability to detect change was also tested in 93 patients using effect size.ResultsThe Cronbach’s α for the PDA ranged from 0.56 to 0.93. The average inter-item correlation coefficients ranged from 0.28 to 0.83. ICCs for the PDA ranged from 0.37 to 0.83. The paired t-test showed a significant difference between the summary score and the six subscale scores before and after replacement with new dentures (p < 0.05) and the effect size was 0.97.ConclusionsThe PDA demonstrated good reliability by assessing internal consistency and test-retest reliability. In addition, the PDA demonstrated good validity by assessing discriminant validity. Thus, the PDA could help dentists obtain a detailed understanding of the patients’ perceptions in using their dentures.
Highlights
Demand for complete denture treatment is expected to rise over several decades
Some patient satisfaction evaluation methods depend on only one question [4,5], and it is likely that such evaluations may not be reliable
In prosthetic treatment, one of the most widely used evaluation tools for measurements of oral health related quality of life (OHRQoL) is the Oral Health Impact Profile (OHIP). This instrument has been translated into many languages across the globe [10,11,12,13,14,15,16], which has allowed for comparisons of reliability and validity between OHIP in different regions
Summary
Demand for complete denture treatment is expected to rise over several decades. to date, no questionnaire on complete dentures, as evaluated by edentulous patients, has been shown to be reliable and valid. In prosthetic treatment, one of the most widely used evaluation tools for measurements of oral health related quality of life (OHRQoL) is the Oral Health Impact Profile (OHIP). This instrument has been translated into many languages across the globe [10,11,12,13,14,15,16], which has allowed for comparisons of reliability and validity between OHIP in different regions. Negative-oriented measures composing the OHIP may be unable to capture positive changes in patients with no negative impacts recorded at baseline because the absence of a negative does not necessarily imply a positive [17]
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