RESUMO
BACKGROUND: This randomized crossover trial examines the effect of continuous glucose monitoring (CGM) with real-time access (RTA) to glucose data versus CGM with a retrospective analysis (RA) of glucose data regarding satisfaction with CGM and other patient-reported outcomes. METHODS: Participants used the CGM device (GlucoDay, Menarini Diagnostics, Florence, Italy) twice. In one study phase, patients were allowed RTA to, and in the other phase RA of, current glucose values. The order of these two conditions was randomized. At baseline and after the first and second trials, subjects completed questionnaires (Continuous Glucose Monitoring Satisfaction Scale) about perceived satisfaction with CGM. They also completed the Problem Areas in Diabetes Questionnaire, a state anxiety scale (State-Trait Anxiety Inventory), and a depression scale (Center of Epidemiological Studies-Depression Scale). RESULTS: Fifty patients with type 1 diabetes (41.7 +/- 12.3 years old, diabetes duration of 14.75 +/- 11.9 years, 48% female, hemoglobin A1c 8.1 +/- 1.5%, years of education 10.3 +/- 2.1 years) participated in this study. At baseline patients perceived CGM as rather advantageous, but after RA and RTA the perceived benefits were reduced (baseline, 101.0 +/- 16.0; RA, 95.7 +/- 20.2; RTA, 93.6 +/- 22.8; P < 0.01). However, there was no significant difference between RA and RTA. Also, there was no significant effect on diabetes-related distress or state anxiety, but a positive effect on depression scores. CONCLUSIONS: There was no specific, significant, negative or positive effect of RA versus RTA on satisfaction with CGM. Exposing patients with type 1 diabetes to their current glucose values does not seem to have a specific negative impact on the appraisal of CGM or more generic patient-reported outcomes.