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Diagnosing Diabetes

Table 2: Oral Glucose Tolerance Test
Two-Hour Plasma Glucose Result (mg/dL)
139 and below
140 to 199
(impaired glucose tolerance)
200 and above
*Confirmed by repeating the test on a different day

Making a Diabetes Diagnosis Using the Random Plasma Glucose Test

A random blood glucose level of 200 mg/dL or more, plus the presence of the following diabetes symptoms, can mean that you have diabetes:
  • Increased urination
  • Increased thirst
  • Unexplained weight loss.
Other symptoms of diabetes include:
  • Fatigue
  • Blurred vision
  • Increased hunger
  • Sores that do not heal.
Your healthcare provider will check your blood glucose level on another day using the FPG or the OGTT to confirm the diagnosis.
Type 2 Diabetes: Fact or Fiction

Diabetes Information

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