Psychometric Properties of the Thai Version Psychological Well-Being Scale and the Factors Related to among Thai Patients with Major Depressive Disorder.

Background: The assessment to provide care and support to patients with major depressive disorder (MDD) currently focuses on the recovery from the disease, but it is still lacking in measuring and developing psychological well-being among Thai patients with MDD. Therefore, this research is aimed at studying the psychometric properties of the Thai version psychological well-being scale and study factors related to among patients with MDD.

Materials and methods: The Thai version psychological well-being scale, an 8-point Likert-type scale, was translated by our research team and used to examine psychometric properties as well as to identify the factors related to psychological well-being in a cross-sectional study among samples of 111 patients diagnosed with MDD from Princess Maha Chakri Sirindhorn Medical Center in Nakhon Nayok Province, Thailand.

Results: Cronbach's alpha for the Thai version psychological well-being scale was .91, unidimensionality was examined with exploratory factor analysis, and the structural validity was assessed with confirmatory factor analysis. The convergent validity was found using the correlation coefficients of the Thai version psychological well-being scale with the Beck Depression Inventory (BDI) and Gratitude Questionnaire (GQ-6). However, none of the social factors were significantly correlated with Thai patients' psychological well-being with MDD.

Conclusion: The Thai version psychological well-being scale is a brief and concise scale with high reliability to evaluate Thai patients with MDD which can support and improve their well-being.