ADA Guidelines: Categories of Increased Risk for Diabetes (Prediabetes)

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The page below is a sample from the LabCE course Diabetes: Diagnosis, Laboratory Testing, and the Current American Diabetes Association Guidelines. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

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ADA Guidelines: Categories of Increased Risk for Diabetes (Prediabetes)

Table 4 provides the criteria that define an increased risk for diabetes (prediabetes). Only one of the testing criteria needs to be met in order to be considered prediabetic.
Table 4. Categories of Increased Risk for Diabetes.

Prediabetic Range
Impaired Fasting Glucose (IFG)Fasting plasma glucose (FPG) 100–125 mg/dL (5.6–6.9 mmol/L)
Impaired Glucose Tolerance (IGT)2-hr plasma glucose in 75g OGTT 140–199 mg/dL (7.8–11.0 mmol/L)
A1C5.7–6.4%
Frequency of testing:
The ADA now recommends that adults who do not have diabetes symptoms should be screened for prediabetes and type 2 diabetes starting at age 35. Patients with prediabetes (A1C ≥5.7%, impaired glucose tolerance, or impaired fasting glucose) should be tested yearly. Patients who were diagnosed with GDM should have lifelong testing at least every 3 years.