# Impact of the FreeStyle Libre 2® System on Glycaemic Outcomes in Patients with Type 1 Diabetes—Preliminary Study

## TL;DR

This study examines how using the FreeStyle Libre 2 glucose monitoring system affects blood sugar control in people with type 1 diabetes over three months.

## Contribution

The study provides preliminary evidence on the impact of FSL2 on glycaemic outcomes in treatment-naive type 1 diabetes patients.

## Key findings

- Short-term use of FSL2 significantly reduces glucose management indicator in patients with high hyperglycaemia.
- Patients scanned the sensor more frequently in the first month compared to later months.
- No significant changes in other glycaemic control parameters were observed over the study period.

## Abstract

We aimed to evaluate glycaemic control in patients with type 1 diabetes during the first three months of use of the flash glucose monitoring (FGM) system. Methods: We conducted a study of a cohort of 81 people with type 1 diabetes mellitus who used the FreeStyle Libre 2 (FSL2) sensor continuously for 3 months. Patients had not used a CGM before. The effectiveness of using the FSL2 system was assessed using AGP reports at two time points (3–4 weeks and 11–12 weeks of system use). Results: Eight weeks after using FSL2, compared with results from 3–4 weeks of use, there were no differences in the glucose management indicator, time spent in range, above range and below range, or glucose variability. In the first month of FGM use, patients scanned the sensor significantly more often than in the following two months (p = 0.021). No significant differences were found in the change of the evaluated parameters when comparing patients by duration of diabetes and treatment method. Conclusions: Short-term use of FSL2 promotes a significant reduction in GMI in patients with more time spent in hyperglycaemia (especially > 250 mg/dL). In this short period of use, no other changes in glycaemic control parameters are observed.