Journal
JOURNAL OF CLINICAL MEDICINE
Volume 11, Issue 3, Pages -Publisher
MDPI
DOI: 10.3390/jcm11030564
Keywords
gestational diabetes; diagnosis; Oral Glucose Tolerance Test (OGTT); analytical issues
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This study assessed the analytical reliability of the Oral Glucose Tolerance Test (OGTT) for the diagnosis of gestational diabetes mellitus (GDM). The results indicate that the OGTT is not completely accurate for GDM diagnosis.
The Oral Glucose Tolerance Test (OGTT) is currently the gold standard reference test for the diagnosis of gestational diabetes mellitus (GDM). Several critical issues related to analytical variables have challenged its reproducibility and accuracy. This study aimed to assess the analytical reliability of the OGTT for the diagnosis of GDM. A total of 1015 pregnant women underwent a 2 h 75 g OGTT between 24 and 28 weeks of gestation. As recommended by National Academy of Clinical Biochemistry, we considered the total maximum allowable error for glucose plasma measurement as <6.9%. Assuming the possibility of analytical errors within this range for each OGTT glucose plasma value, different scenarios of GDM occurrence were estimated. GDM prevalence with standard criteria was 12.2%, and no hypothetical scenarios have shown a comparable GDM prevalence. Considering all the three OGTT values estimated at the lowest or the highest allowed value according to total maximum allowable error, GDM prevalence significantly varied (4.5% and 25.3%, respectively). Our results indicate that the OGTT is not completely accurate for GDM diagnosis.
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