Structural Equation Model of Rumination in Thai Workforce-Aged with Depression

Abstract

The objective of this research was to study the factors contributing to rumination in workforce-aged Thais with major depressive disorder. The research was conducted as mixed method which consisted of consensual qualitative research and confirmatory factor analysis model. The samples were 5 professional psychological health specialists and 540 workforce-aged Thais with major depressive disorder who scored from low level to severe level in 9Q screening test for depression. Sampling method used was multi-stage random sampling. Instruments in this research was rumination questionnaire for workforce-aged Thais with reliability = 0.908. Statistical analysis used were frequency, percentage, standard deviation, factor extraction, exploratory factor analysis, first order confirmatory factor analysis and second order confirmatory factor analysis. The result demonstrated that rumination in workforce-aged Thais with major depressive disorder consisted of 3 factors which were status rumination factor, action rumination factor, and unachieved rumination factor. The result of this research demonstrated the statistical significance of the goodness of fit indices X2/df = 1.402, root mean square error of approximation (RMSEA) = 0.027, p-value = 0.141, comparative fit index (CFI) = 0.999, goodness of fit index (GFI) = 0.994, adjusted goodness of fit index (AGFI) = 0.967, standardized root mean square residual (SRMR) = 0.020, and normed fit index (NFI) = 0.997. Each of 3 main rumination factors had factor loading between 0.955–1.139.