Reliability and validity of an indonesian version of the patient's denture assessment (PDA): A self-assessment instrument for measuring patient satisfaction with complete dentures

Background and aim: Several factors, including the nature of the clinical examination and patient satisfaction, influence the success of complete denture treatment. In the past, methods that do not necessarily represent complete denture quality have been used to assess patient satisfaction with complete dentures. A valid and reliable multidimensional self-assessment instrument, which includes various factors that influence perceived treatment outcomes, is needed to assess patient satisfaction with complete dentures. The purpose of this study was to develop and evaluate the reliability and validity of an Indonesian vision of the Patient's Denture Assessment (PDA) questionnaire (PDA-Id) as a tool to measure patient satisfaction (and the cause of patient dissatisfaction) with complete dentures. Patients and methods: In total, 101 patients (50 men and 51 women) aged 45 years and older participated in this study. The reliability of the PDA-Id questionnaire was determined by examining its internal consistency and test-retest reliability. The internal consistency of all the questionnaire items in the six subscales of the PDA was measured by determining Cronbach'sa values and average inter-item correlation coefficients among the 101 participants. The test-retest reliability was determined in 25 of the 101 patients by administering the questionnaire two weeks after the initial completion of the PDA-Id. The PDA-Id questionnaire was validated using factor analysis, and its convergent validity was determined by examining the correlation between the summary score of the PDA questionnaire and masticatory ability, which was evaluated using color-change able chewing gum, of the 101 patients. Results: The results of the validation and reliability test of the PDA were satisfactory (Cronbach's a summary score: 0.708). The Cronbach's a score for each of the PDA components ranged from 0.765-0.834, and the intra class correlation coefficient (ICC) in the test-retest was 0.797. Spearman's correlation analysis of the correlation between masticatory performance and patient satisfaction revealed values of p=0.001 r=0.0633. Conclusion: The reliability of the PDA-Id questionnaire was good, as determined by the assessment of its internal consistency and test-retest reliability. It also showed good validity, as demonstrated by the results of the factor analysis and convergent validity.