Psychometric analysis and reliability of the dental treatment motivation scale for Indonesian pregnant women

Abstract

This study aimed to obtain the results of psychometric analysis and reliability of the dental treatment motivation scale (DTMS), which was adapted cross-culturally for pregnant women in Indonesia. A descriptive survey was conducted with 149 pregnant women at a maternal clinic in Bandung City, Indonesia, in December 2020. Convenience sampling was chosen as the sampling technique after the inclusion and exclusion criteria had been fulfilled. Two English experts initially translated the DTMS questionnaire from English into Indonesian and the translated questionnaire was then reviewed by four expert panels, which were modified afterwards. The validity test was carried out using the exploratory and confirmatory factor analyses and goodness of fit index (GFI). The internal reliability analysis used Cronbach's alpha, and the test-retest was conducted using Pearson's correlation coefficient. The psychometric analysis results were obtained from four testing stages. The first stage was the initial eigenvalue assessment, and the cumulative percentage value was >60%. The second stage was the exploratory factor analysis, with a loading factor of >0.3. The third stage consisted of the confirmatory factor analysis, forming two components of the factor structure (intrinsic and extrinsic motivations). Finally, the fourth stage was the GFI assessment, which showed the good fit model with a value of 0.903. Very high internal consistency reliability ranged from 0.985 to 0.990; the test-retest p-value of Pearson's correlation coefficient was 0.000. In conclusion, the Indonesian version of the DTMS proved to be a reliable and valid instrument to measure Indonesian pregnant women's motivation to seek oral health treatment.