Author(s): PyhnenAlho MK, Teramo KA, Kaaja RJ, Hiilesmaa VK
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Abstract OBJECTIVE: Our aim was to study whether universal screening of all pregnant women by Oral Glucose Challenge Test (OGCT) would identify a higher number of women with Gestational Diabetes (GDM) than risk factor based screening. STUDY DESIGN: A 50 g OGCT test was performed prospectively in 532 unselected women at 26-28 weeks of gestation. The 1-h venous plasma glucose concentration of >7.3 mmol/l was considered as a positive screening result. Patients with a positive OGCT underwent a 75 g 2-h OGTT, which was used as the actual diagnostic test for GDM. When two or all three of the glucose concentrations in OGTT (measured at fasting state and 1 and 2 h after the 75 g glucose load) were above the 97.5th percentile the patient was considered as having GDM. In addition, women with risk factors for GDM also underwent a 75 g OGTT regardless of the result of the OGCT. RESULTS: A positive 50 g OGCT was obtained in 123 (23\%) of the women. In 15 (12\%) of these, a diagnosis of GDM was established by the subsequent OGTT. Out of the 409 remaining women with a normal OGCT, 148 (36\%) had risk factors for GDM. An OGTT performed in these patients identified 4 additional women with a GDM. Seventy-nine percent of GDM was thus found with 50g OGCT without regarding risk factors. Forty-seven percent of the women with GDM would have been missed in screening by risk factors only. CONCLUSIONS: In our population 50 g OGCT appears to identify a higher number of GDM than risk factor based screening. Combined with risk factor screening a few more cases of GDM would be found.
This article was published in Eur J Obstet Gynecol Reprod Biol
and referenced in Journal of Biometrics & Biostatistics