Psychometric Evaluation of the Swedish Acceptance and Action Diabetes Questionnaire: A Rasch Analysis

Abstract

Background and Purpose: The Acceptance and Action Diabetes Questionnaire (AADQ) is a tool for assessing the acceptance of thoughts and emotions related to diabetes in people living with the disease. This study aimed to examine the psychometric properties of the Swedish version of AADQ (Swe-AADQ) in a sample of adults with type 1 diabetes. Methods: To examine the psychometric properties of the Swe-AADQ, the Rasch model was used. Data for 120 individuals were included. Results: The Swe-AADQ showed an acceptable fit to the Rasch model. A sufficiently high value of the separation index indicated a capacity to distinguish between different levels of acceptance in the sample. The 7-point Likert scale was reduced to three categories suggesting an improvement in the ordering of the item thresholds. Conclusions: The Swe-AADQ possesses reasonable quality in terms of reliability and validity. However, there are some deficiencies regarding the categorization of the response rating that should be addressed.

Keywords: acceptance and commitment therapy; diabetes mellitus type 1; psychometrics; rasch analysis.