OGT Glucose Values and Reference Ranges 2

Question 1

Which fasting glucose level during OGTT confirms diabetes without further testing?

Accepted Answer

≥126 mg/dL

Answer

A fasting plasma glucose of ≥126 mg/dL, confirmed on a repeat test, meets ADA criteria for diabetes diagnosis.

Question 2

What plasma glucose value defines reactive hypoglycemia during an extended OGTT?

Accepted Answer

<70 mg/dL within 4 hours of glucose load

Answer

Reactive hypoglycemia is diagnosed when plasma glucose drops below 70 mg/dL within 4 hours of glucose ingestion during an extended OGTT.

Question 3

In which unit does the WHO express glucose values when reporting OGTT results internationally?

Accepted Answer

mmol/L

Answer

The World Health Organization reports glucose in mmol/L, which is the standard in most countries outside the United States.

Question 4

A 1-hour plasma glucose of 209 mg/dL during a 75 g OGTT in a non-pregnant adult is:

Accepted Answer

Used in combination with fasting and 2-hour values for diagnosis

Answer

For non-pregnant adults, the 1-hour glucose value alone is not a standalone diagnostic criterion; it is interpreted alongside fasting and 2-hour values.

Question 5

What is the normal 2-hour plasma glucose value during an OGTT?

Accepted Answer

<140 mg/dL

Answer

A 2-hour plasma glucose below 140 mg/dL is considered a normal result on a standard OGTT.

OGT - Oral Glucose Tolerance Practice Test

OGT - Oral Glucose Tolerance Practice Test

OGT Glucose Values and Reference Ranges 2