OGT Interpreting OGTT Results and Glucose Tolerance Classifications 2

Question 1

What HbA1c range does the ADA use to identify prediabetes?

Accepted Answer

5.7%–6.4%

Answer

5.0%–5.6%

Answer

6.5%–7.0%

Answer

7.0%–7.5%

Question 2

In interpreting OGTT results, a 'flat curve' with minimal glucose rise after the oral glucose load may suggest:

Accepted Answer

Malabsorption or delayed gastric emptying

Answer

Diabetes mellitus

Answer

Reactive hypoglycemia

Answer

Cushing's syndrome

Question 3

Reactive hypoglycemia on an extended OGTT is characterized by:

Accepted Answer

A normal initial glucose rise followed by a drop below 70 mg/dL at 2–3 hours

Answer

Fasting glucose below 50 mg/dL

Answer

Persistently elevated glucose throughout the test

Answer

No measurable glucose peak after the load

Question 4

For a 3-hour 100g OGTT using Carpenter-Coustan criteria, gestational diabetes is diagnosed when how many values meet or exceed thresholds?

Accepted Answer

2 out of 4

Answer

1 out of 4

Answer

3 out of 4

Answer

All 4 values

Question 5

What is the fasting plasma glucose threshold in the Carpenter-Coustan criteria for the 3-hour 100g OGTT?

Accepted Answer

95 mg/dL

Answer

90 mg/dL

Answer

105 mg/dL

Answer

110 mg/dL

Question 6

Which OGTT glucose curve pattern is most consistent with impaired first-phase insulin secretion seen in early type 2 diabetes?

Accepted Answer

Delayed glucose peak at 2 hours with slow return to baseline

Answer

Flat curve with minimal glucose rise

Answer

Normal fasting and normal 2-hour glucose

Answer

Immediate drop in glucose below fasting levels

Question 7

An exaggerated early glucose peak at 30–60 minutes that returns fully to normal by 2 hours on an OGTT most likely suggests:

Accepted Answer

Dumping syndrome or accelerated gastric emptying

Answer

Diabetes mellitus

Answer

Adrenal insufficiency

Answer

Chronic renal failure