OGT Glucose Values and Reference Ranges

Question 1

According to ADA criteria, what is the 2-hour plasma glucose value that confirms diabetes during an OGTT?

Accepted Answer

≥200 mg/dL

Answer

≥140 mg/dL

Answer

≥180 mg/dL

Answer

≥250 mg/dL

Question 2

What 2-hour OGTT value indicates impaired glucose tolerance (prediabetes)?

Accepted Answer

140–199 mg/dL

Answer

<100 mg/dL

Answer

100–125 mg/dL

Answer

≥200 mg/dL

Question 3

A fasting plasma glucose below which value is considered normal on an OGTT?

Accepted Answer

<100 mg/dL

Answer

<70 mg/dL

Answer

<110 mg/dL

Answer

<126 mg/dL

Question 4

What fasting glucose level at the start of an OGTT indicates impaired fasting glucose (IFG)?

Accepted Answer

100–125 mg/dL

Answer

70–99 mg/dL

Answer

126–139 mg/dL

Answer

≥140 mg/dL

Question 5

Which unit is standardly used to report plasma glucose in US OGTT results?

Accepted Answer

mg/dL

Answer

mmol/L

Answer

mEq/L

Answer

g/dL

Question 6

A 2-hour glucose of 138 mg/dL on a standard OGTT would be categorized as:

Accepted Answer

Normal

Answer

Impaired glucose tolerance

Answer

Diabetes

Answer

Hypoglycemia