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Early gestational glucose screening and gestational diabetes
W J Meyer1, J Carbone, D W Gauthier
1Department of Obstetrics and Gynecology, University of Illinois at Chicago 60612-7313, USA.
The Journal of Reproductive Medicine
|September 1, 1996
Summary
Early glucose screening can detect gestational diabetes in high-risk pregnancies. Repeat testing in the third trimester is recommended for those with initially abnormal screening results.
Area of Science:
- Obstetrics and Gynecology
- Endocrinology
- Maternal-Fetal Medicine
Background:
- Gestational diabetes mellitus (GDM) poses risks to both mother and fetus.
- Early detection of GDM is crucial for timely management and improved outcomes.
- Current screening protocols vary, prompting investigation into optimized timing and methods.
Purpose of the Study:
- To evaluate the efficacy of early glucose screening (before 24 weeks' gestation) in identifying cases of gestational diabetes.
- To identify maternal characteristics and risk factors associated with early detection of glucose intolerance during pregnancy.
Main Methods:
- Retrospective analysis of 329 pregnant patients undergoing early and complete prenatal care.
- Initial 50-g, 1-hour glucose screen followed by a 100-g, 3-hour glucose tolerance test for abnormal screens.
- Gestational diabetes diagnosis based on two or more abnormal values on the 3-hour test.
- Statistical analysis using ANOVA and chi-squared testing (P < .05).
Main Results:
- GDM was diagnosed in 6.1% of patients.
- Early screening detected 40% of GDM cases.
- Maternal age >30, Black race, and presence of risk factors were associated with early detection.
- Poor weight gain correlated with later glucose intolerance.
- 16% of patients with initially normal glucose tolerance tests developed GDM by the third trimester.
Conclusions:
- Early gestational glucose screening is beneficial for detecting GDM in specific high-risk populations (e.g., maternal age >30, Black race, known risk factors).
- Consideration for repeat glucose testing in the early third trimester is warranted for patients with initially false-positive one-hour screening tests.