OBJECTIVE

The need to assess oral health-related quality of life (OHRQoL) has grown increasingly in the healthcare sector over the past few decades. The Dental Impact on Daily Living (DIDL) assessment is a tool created to measure OHRQoL. The aim of this study was to complete a cross-cultural adaptation of the DIDL to yield a valid and reliable Indonesian version for use as an official instrument to assist in further OHRQoL research in Indonesia.

MATERIALS AND METHODS

The original English version of the DIDL was translated and validated. Content validity and face validity were considered. Psychometric testing for test-retest reliability was analyzed among 32 subjects, while internal consistency using Cronbach's alpha and clinical oral health status using the DMF-T index to obtain convergent validity of the questionnaire were checked among 278 subjects.

RESULTS

The study subjects showed a good understanding of how to complete the Indonesian language version of the DIDL questionnaire, and conceptual and semantic equivalence (content and face validity) were noted. Further, test-retest reliability was noted (intraclass correlation coefficient range: 0.975-1 and Cronbach's alpha: 0.942), whereas convergent validity suggested a correlation between DMF-T and DIDL questionnaire of -0.502 with significance at alpha of 5% ( = 0.00), which means that decreasing the DMF-T outcome will increase the satisfaction using the DIDL among research subjects.

CONCLUSION

Cross-cultural adaptation of the DIDL yielded a valid and reliable Indonesian version. The DIDL questionnaire is a promising questionnaire that can be applied to measure OHRQoL in Indonesians.