Carpenter-Coustan GDM Criteria
Carpenter-Coustan GDM criteria on the 100-g 3-hour OGTT: fasting >= 95, 1-hour >= 180, 2-hour >= 155, 3-hour >= 140 mg/dL; >= 2 values exceeding diagnoses GDM, a single abnormal value is impaired glucose tolerance.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Fasting glucose
- 85 mg/dL
- 1-hour glucose
- 160 mg/dL
- 2-hour glucose
- 140 mg/dL
- 3-hour glucose
- 120 mg/dL
Result: Carpenter-Coustan: 0 of 4 values exceed cutoffs -> not diagnostic of GDM per Carpenter 1982.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- 0 abnormal
- Not diagnostic of GDM per Carpenter 1982.
- 1 abnormal
- Impaired glucose tolerance per Carpenter 1982 (single abnormal value).
- >=2 abnormal
- GDM diagnosed per Carpenter 1982 (>=2 values exceed fasting 95 / 1-h 180 / 2-h 155 / 3-h 140 mg/dL).
What you enter
- Fasting glucose
- 1-hour glucose
- 2-hour glucose
- 3-hour glucose
How this is calculated
Carpenter MW, Coustan DR. Criteria for screening tests for gestational diabetes. Am J Obstet Gynecol. 1982;144(7):768-773. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.