Testing the Psychometric Characteristics of the Revised Mastery of Stress Instrument in Adults With Type 2 Diabetes

Background and Purpose: A promising, yet lengthy measure to identify mastery of patient-identified stress is Younger’s (1991, 1993) Mastery of Stress Instrument (MSI). With a goal for a parsimonious and valid measure, this study determined the psychometric properties of a reduced item instrument with adults diagnosed with type 2 diabetes. Methods: First, an expert content analysis was completed. Second, item and confirmatory factor analysis were completed with a sample of 200 adults with a diagnosis of type 2 diabetes. Results: Eight items were removed through content validity and seven items were removed with Item analysis. Factor analysis supported Younger’s four sub-concepts. Conclusions: Future research with this revised MSI scale is advocated to identify those who may need strategies to increase their mastery of stress.