![]() ![]() ![]() The mean lag time between sensor and YSI reference values was 4.5±4.8 min. ![]() The overall mean absolute relative difference was 11.4%. The percentage of readings within Consensus Error Grid Zone A on Days 2, 7, and 14 was 88.4%, 89.2%, and 85.2%, respectively. Results: The accuracy of the results was demonstrated against capillary BG reference values, with 86.7% of sensor results within Consensus Error Grid Zone A. Sensor readings were masked to the participants. Sensor glucose measurements were compared with capillary blood glucose (BG) results (approximately eight per day) obtained using the BG meter built into the reader (BG reference) and with the YSI analyzer (Yellow Springs Instrument, Yellow Springs, OH) reference tests at three clinic visits (32 samples per visit). Three factory-only calibrated sensor lots were used in the study. A sensor was inserted on the back of each upper arm for up to 14 days. Materials and Methods: Seventy-two study participants with type 1 or type 2 diabetes were enrolled by four U.S. Introduction: The purpose of the study was to evaluate the performance and usability of the FreeStyle ® Libre™ Flash glucose monitoring system (Abbott Diabetes Care, Alameda, CA) for interstitial glucose results compared with capillary blood glucose results. ![]()
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