Glucose intolerance during pregnancy. II. A comparative study of diagnostic screening methods

Area of Science:

• Obstetrics and Gynecology
• Endocrinology
• Perinatal Medicine

Background:

• Gestational diabetes mellitus (GDM) poses risks to both mother and fetus.
• Accurate screening for GDM is crucial for timely intervention.
• Existing screening methods, like the 2-hour postprandial glucose test (2hpp), may have limitations.

Purpose of the Study:

• To compare the diagnostic accuracy of the rapid intravenous glucose tolerance test (IVGTT) and the 2-hour postprandial glucose test (2hpp).
• To evaluate the predictive value of these tests for pregnancy outcomes in high-risk women.

Main Methods:

• A cohort of 77 high-risk pregnant women underwent both 2hpp and rapid IVGTT in the third trimester.
• Newborn data, including birth weight and perinatal morbidity, were collected.
• Statistical analysis compared the yield of positive results and associations with pregnancy outcomes.

Main Results:

• The IVGTT identified a significantly higher proportion of positive cases (44.15%) compared to the 2hpp test (35.06%).
• Abnormal IVGTT results were significantly associated with heavier babies and increased perinatal morbidity.
• No significant association was observed between abnormal 2hpp results and adverse pregnancy outcomes.

Conclusions:

• The rapid IVGTT demonstrates superior diagnostic yield and predictive value for adverse pregnancy outcomes in high-risk pregnancies compared to the 2hpp test.
• IVGTT may be a more dependable screening tool for gestational diabetes in selected pregnant populations.
• These findings support the potential utility of IVGTT in managing high-risk pregnancies.