Based on Total Glycohemoglobin (Wallach)
estimated mean daily plasma glucose (mg/dL) =
= (10 * ((total glycohemoglobin A1 level in percent) + 4)) =
= (10 * (total glycohemoglobin A1 level in percent)) + 40
where:
• total glycohemoglobin A1 = A1a + A1b + A1c
• normal total glycohemoglobin: 4-8%
• The equation is applicable for total glycohemoglobin A1 levels between 4-20%.
Based on Hemoglobin A1c Alone
|
Hemoglobin A1c in Percent
|
Whole Blood Glucose in mg/dL
|
|
6%
|
120
|
|
7%
|
150
|
|
8%
|
180
|
|
9%
|
210
|
|
10%
|
240
|
|
11%
|
270
|
|
12%
|
300
|
|
13%
|
330
|
|
14%
|
360
|
If this data is modeled in JMP:
whole blood glucose in mg/dL =
= (30 * (percent HgbA1c as a whole number)) - 60
American Diabetes Association (ADA) Equations
The formulae recommended by the ADA are based on the A1c-Derived Daily Glucose (ASAG) study:
estimated average glucose in mg/dL =
= (28.7 * (percent hemoglobin A1c)) - 46.7
estimated average glucose in mmol/L =
= (1.59 * (percent hemoglobin A1c)) - 2.59
