Freezer temperature for 45 days (frozen specimen needs to stay frozen until tested, do not freeze/thaw)
Performed
Chemistry. Daily
Notes
The correlation of Estimated Average Glucose (EAG) included with the A1C follows from recent recommendations from the American Diabetes Association [1]: "The results of the A1C-Derived Average Glucose study (ADAG), published in Diabetes Care, have affirmed the existence of a linear relationship between A1C and average blood glucose levels [2]. In light of the study results, ADA is recommending the use of a new term in diabetes management, estimated average glucose, eAG. Health care providers can now report A1C results to patients using the same units (mg/dl or mmol/l) that patients see routinely in blood glucose measurements."
The linear relationship between eAG and A1c is given by the formula: eAG (mg/dL) = 28.7 x A1C (%) - 46.7
Additionally, a table giving 95% confidence intervals (CI) for eAG is also appended to A1c results reports.
References: [1] http://professional.diabetes.org/glucosecalculator.aspx (accessed January 2009). [2] Nathan DM, Kuenen J, Borg R, Zheng H, Schoenfeld D, Heine RJ; A1c-Derived Average Glucose Study Group. Translating the A1C assay into estimated average glucose values. Diabetes Care. 2008 Aug;31:1473-8.
Freezer temperature for 45 days (frozen specimen needs to stay frozen until tested, do not freeze/thaw)
Performed
Chemistry. Daily
Notes
The correlation of Estimated Average Glucose (EAG) included with the A1C follows from recent recommendations from the American Diabetes Association [1]: "The results of the A1C-Derived Average Glucose study (ADAG), published in Diabetes Care, have affirmed the existence of a linear relationship between A1C and average blood glucose levels [2]. In light of the study results, ADA is recommending the use of a new term in diabetes management, estimated average glucose, eAG. Health care providers can now report A1C results to patients using the same units (mg/dl or mmol/l) that patients see routinely in blood glucose measurements."
The linear relationship between eAG and A1c is given by the formula: eAG (mg/dL) = 28.7 x A1C (%) - 46.7
Additionally, a table giving 95% confidence intervals (CI) for eAG is also appended to A1c results reports.
References: [1] http://professional.diabetes.org/glucosecalculator.aspx (accessed January 2009). [2] Nathan DM, Kuenen J, Borg R, Zheng H, Schoenfeld D, Heine RJ; A1c-Derived Average Glucose Study Group. Translating the A1C assay into estimated average glucose values. Diabetes Care. 2008 Aug;31:1473-8.
