Development and Psychometric Validation of the Novel Glucose Monitoring Experiences Questionnaire Among Adults with Type 1 Diabetes.

Glucose monitoring is an essential aspect of self-care for people with type 1 diabetes. With technologies developing rapidly, valid assessment of user experiences and satisfaction is needed. Our aim was to develop a novel measure: the Glucose Monitoring Experiences Questionnaire (GME-Q). Questionnaire design was informed by exploratory and cognitive debriefing interviews. The GME-Q was included in a large online survey enabling psychometric validation. The interview sample included 17 adults (aged [mean ± SD] 46 ± 11 years, 53% women) with type 1 diabetes duration of 26 ± 14 years. The proposed conceptual framework included three domains: "Effectiveness", "Intrusiveness", and "Convenience", assessed with 25 items plus a single, overview item. The validation sample included 589 adults (aged 44 ± 15 years; 64% women) with type 1 diabetes (duration: 22 ± 14 years, self-monitoring blood glucose [SMBG] using finger-prick devices: median [IQR] 6 [4-7] daily checks). Questionnaire acceptability was indicated: 98% ( = 578) completion rate. After deleting 3 redundant items, principal components analysis supported a 22-item questionnaire with 3 domains ("Effectiveness" [9 items]; "Intrusiveness" [6 items]; "Convenience" [7 items]), accounting for 55% of variance, with good internal consistency reliability (α = 0.83-0.88). Subscales correlated significantly ( = ±0.44-0.66,  < 0.001) with the single, overview item, together explaining 51% of the total variance in the single item score. Associations with demographic and clinical characteristics supported convergent and discriminant validity. Overall, the 22-item GME-Q is a brief, acceptable, valid, and reliable measure of satisfaction with glucose monitoring in adults with type 1 diabetes using SMBG, and this needs to be assessed among those using continuous glucose monitoring.