Psychometric evaluation of the depression, anxiety, and stress scale-21 (DASS-21) among Chinese primary and middle school teachers

Abstract

The DASS-21 was found to be a reliable and valid tool for measuring the mental health of teachers over time. To assess the instrument's psychometric properties, a combination of confirmatory factor analysis, Rasch analysis, and network analysis was utilized, which proved effective and is recommended for evaluating contentious instruments. Based on the results of the study, researchers and healthcare professionals are recommended to use the DASS-21 for assessing teachers' psychological distress. However, certain items identified in the study may need to be removed to enhance the instrument's appropriateness for this specific population.