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. 2021 Aug 10;8:707371. doi: 10.3389/fnut.2021.707371

Table 1.

Definition of type 2 diabetes mellitus.

Diagnosis HgbA1c Fasting glucose OGTTa Insulin Glucose in bloodb
mg/dL (mmol/L) mg/dL (mmol/L) uIU/L (pmol/L) grams
Normal <5.7% <100 (5.6) <140 (7.8) <10 (60) <5.0
Pre-diabetes 5.7–6.4% 100–125 (5.6–6.9) 140–199 (7.8–11) >10 (60) 5.0–6.25
Type 2 diabetes ≥6.5% >125 (6.9) ≥200 (11.1) >10 (60) >6.25
a

OGGT, oral glucose tolerance test. At 2 h after drinking 75 grams of glucose.

b

Assuming 5L of blood.

Source: American Diabetes Association (1).