Updated Version of Motiva.Diaf-DM2 v2 Questionnaire for the Assessment of Diet and Physical Activity in Patients with Type 2 Diabetes Mellitus

Abstract

Objective: The purpose of this study was to test the psychometric properties of the Motiva.Diaf-DM2 v2 questionnaire that assesses motivation and adherence to healthy eating and physical activity recommendations in patients with type 2 diabetes. Materials and methods: A cross-sectional study was designed to assess the psychometric properties of the Motiva.Diaf-DM2 v2 study questionnaire. Participants were patients over 18 years old, diagnosed with type 2 diabetes. All participants completed the Motiva.Diaf-DM2 v2 questionnaire and an HbA1c test. Additionally, two weeks after the administration of the questionnaire, 50 patients completed the questionnaire for the retest of the instrument. Factor analysis and coefficients were performed for data analysis. Results: A total of 220 patients were recruited to the study from primary care, with a mean age of 63.32 years (SD = 9.70) and 38% of the patients were women. Systematic sampling (k = 5) was used to select a random subsample of 44 patients for the retest. The questionnaire consisted of two factors. Both factors showed good internal consistency, a = 0.781 and a = 0.687 for the first and second factor, respectively. Coefficients were 0.976 for the first factor and 0.999 for the second factor. The results showed that scores for adherence to healthy behaviors had good reliability in terms of internal consistency and temporal stability. Conclusions: The Motiva.Diaf-DM2 v2 shows good psychometric properties to be used with primary care patients diagnosed with type 2 diabetes mellitus.