Blood glucose index is a measure of glycemic risk based on the same normalizing transformation as the adrrgvp measure but is specifically designed to be sensitive to hypoglycemia (lbgi) and hyperglycemia (hbgi), respectively, and to have zero correlation with their opposite ranges on the blood glucose scale. The lbgi and hbgi are scored based on risk categories: Low risk, [0,2.5); moderate risk, [2.5,5); and high risk, 5 and above.