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Korean Journal of Obstetrics & Gynecology 2002;45(1):45-50.
Published online January 1, 2002.
The Significance of Normal 100 gm Oral Glucose Tolerance Test on Perinatal Outcomes.
Won Jong Lee, Byung Cheol Sohn, Haeng Soo Kim, Jeong In Yang, Seong Cheon Yang, Mi Yeong Jo, Jong Man Ryou, Kie Suk Oh, Hee Sug Ryu
Department of Obstetrics and Gynecology, Ajou University School of Medicine, Suwon, Korea.
Abstract
OBJECTIVE
To evaluate perinatal outcomes in patients with abnormal 50 gm challenge test followed by normal 100 gm oral glucose tolerance test (OGTT) value. METHODS: We examined the pregnancy outcomes of 423 women classified as the study group with abnormal 50 gm oral glucose challenge test (OGCT) followed by normal 100 gm OGTT based on NDDG criteria. If the 1-hour plasma glucose value of 50 gm OGCT was over 130 mg/dL, the patient was scheduled for a full 3-hour 100 gm OGTT. 50 gm OGCT and 100 gm OGTT were administered at 24-28 and 28-32 weeks' gestation, respectively. The control group constituted of 467 age- and body mass index (BMI)-matched negative screenees. We defined poor maternal outcomes as those suffering from any one of hydramnios or oligohydramnios, preeclampsia, cesarean delivery due to cephalopelvic disproportion, dystocia, or fetal distress. We also defined poor neonatal outcomes as those suffering from any one of hyperbilirubinemia, hypoglycemia, congenital anomaly, admission to neonatal intensive care unit due to respiratory distress syndrome, or perinatal mortality. Retrospective review of outcomes of these patients was performed. Student t-test, Fisher's exact test and chi-square test were used to determine the statistical significance. RESULTS: There were no significant differences in demographic and obstetric characteristics between the control group and the study group. There were no significant differences in gestational age (38.7+/-1.5 vs 38.5+/-1.5 weeks), birth weight (3189.2+/-420.9 vs 3236.7+/-423.1 gm), between the groups. And there were no significant differences in preterm birth (6.2% vs 7.4%), large for gestational age births (4.5% vs 5.0%), intrauterine growth restriction (5.4% vs 4.3%) between the groups. There were no significant differences in poor maternal outcomes (15.6% vs 18.7%) and poor neonatal outcomes (3.9% vs 5.7%) between the groups. CONCLUSION: We conclude that abnormal value on 50 gm challenge test followed by normal 100 gm OGTT is not associated with adverse perinatal outcomes.
Key Words: Normal 100 gm oral glucose tolerance test, Perinatal outcomes


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