Accuracy of Four Blood Glucose Monitoring Systems

Method: Accuracy of the four blood glucose monitoring systems for fingertip capillary blood testing was assessed at three diabetes clinics. A total of 142 diabetic subjects were included in the study. At each study site, the trained operator tested the subject’s fingertip blood with the four systems and a YSI glucose analyzer, which served as the reference. Accuracy was evaluated according to ISO 15197 by calculating the percentage of meter results falling within ±5%, ±10%, ±15% and ±20% of the reference value for glucose concentrations 75 mg/dL (4.2 mmol/L) or higher, and within ±5, ±10, ±15 mg/dL (±0.28, ±0.56 and ±0.83 mmol/L) of the reference value for glucose concentrations below 75 mg/dL (4.2 mmol/L).