Diagnosis and Assessment
Table 1. Prediabetes Risk Factors Suggesting a Need for
Screening (D-4)
Family history of DM
CVD
Being overweight or obese
Sedentary lifestyle
Nonwhite ancestry
Previously identified impaired glucose tolerance, impaired fasting glucose, and/or
metabolic syndrome
Hypertension
Increased levels of triglycerides, low concentrations of HDL-C, or both
History of GDM
Delivery of a baby weighing more than 4 kg (9 lb)
Polycystic ovarian syndrome
Antipsychotic therapy for schizophrenia and/or severe bipolar disease
Table 2. Glucose Testing and Interpretation
Test
Result
Diagnosis
FPG, mg/dL
≤ 99
100-125
≥ 126
Glucose, mg/dL (OGTT,
2 hours after ingestion of
75-g glucose load)
≤ 139
140-199
≥ 200
HbA1c, %
(as a screening test)
≤ 5.4
5.5-6.4
Normal
Impaired fasting glucose
Diabetes, confirmed by repeating
the test on a different day
Normal
Impaired glucose tolerance
Diabetes, confirmed by repeating
the test on a different day
Normal
High risk/prediabetes; requires
screening by glucose criteria
Diabetes, confirmed by repeating
the test on a different day
≥ 6.5
2
