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A Clinical Trial of the Accuracy and Treatment Experience of the Flash Glucose Monitor FreeStyle Libre in Adults with Type 1 Diabetes

Artikel i vetenskaplig tidskrift
Författare Arndis Olafsdottir
Stig Attvall
U. Sandgren
S. Dahlqvist
A. Pivodic
Stanko Skrtic
E. Theodorsson
Marcus Lind
Publicerad i Diabetes Technology & Therapeutics
Volym 19
Nummer/häfte 3
Sidor 164-172
ISSN 1520-9156
Publiceringsår 2017
Publicerad vid Institutionen för medicin, avdelningen för molekylär och klinisk medicin
Sidor 164-172
Språk en
Länkar doi.org/10.1089/dia.2016.0392
Ämnesord Diabetes mellitus, Flash glucose monitor, Accuracy, randomized controlled-trial, glycemic control, system, Endocrinology & Metabolism
Ämneskategorier Endokrinologi och diabetes

Sammanfattning

Background: In Sweden, FreeStyle Libre a flash glucose monitoring system came onto the market in 2014 as a complement to self-monitoring of blood glucose. The aim of this study was to evaluate the accuracy and treatment experience of the FreeStyle Libre system. Methods: Fifty-eight adults with type 1 diabetes used FreeStyle Libre for 10-14 days and measured capillary blood glucose levels with the HemoCue blood glucose measurement system at least six times a day simultaneously. Results: For the entire study period, the mean absolute relative difference (MARD) was 13.2% (95% confidence interval [CI] 12.0%-14.4%). MARD was 13.6% (95% CI 12.1%-15.4%) during week 1 and 12.7% (95% CI 11.5%-13.9%) during week 2. The mean absolute difference (MAD) for the whole study period was 19.8mg/dL (1.1mmol/L) (95% CI 17.8-21.8 mg/dL), including 20.5 mg/dL (1.14 mmol/L) during week 1 and 19.0 mg/dL (1.05 mmol/L) during week 2. The overall correlation coefficient was 0.96. For glucose values < 72, 72-180, and > 180mg/dL (< 4, 4-10, and > 10 mmol/L), the MARD was 20.3% (95% CI 17.7%-23.1%), 14.7% (95% CI 13.4%-16%), and 9.6% (95% CI 8.5%-10.8%), respectively, and respective MAD values were 12.3, 17.8, and 23.6 mg/dL (0.69, 0.99, and 1.31mmol/L). Using the 10-item visual analog scale, patients rated their experience with FreeStyle Libre as generally positive, with mean values ranging from 8.22 to 9.8. Conclusions: FreeStyle Libre had a similar overall MARD as continuous blood glucose monitoring systems in earlier studies when studied in similar at-home conditions. The overall patient satisfaction was high.

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