How accurate are blood glucose meters?
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Approximately half of patients report blood glucose readings with an error rate of more than ±10% of the laboratory value. (SOR B, based on cross-sectional studies.) The American Diabetes Association (ADA) recommends healthcare providers evaluate a patient's blood glucose monitoring technique during initiation of self-monitoring, and then subsequently at regular intervals. (SOR C, based on consensus opinion.)
Evidence Based Practice 11(4): 03-04.