Concealed maternal blood glucose excursions correlate with birth weight centile.
BACKGROUND: The objective of this study was to test the hypothesis that maternal blood glucose excursions correlate with deviation from optimized birth weight. METHODS: Patients were recruited for 3-day continuous glucose monitoring (CGM) plus self-blood glucose monitoring followed by routine diabetes screening at 26-28 weeks gestation. Patients and caregivers were blinded to CGM results. The magnitude and duration of blood glucose (BG) excursions were measured as a "glycemia index." A customized birth weight centile was calculated. RESULTS: Twenty-three patients consented, 21 completed the study: 5 diabetic and 16 nondiabetic individuals. The duration of CGM was 72 (+/-7.2) hours, and each patient performed self-BG monitoring >/=3 times per day. All diabetic and 10 nondiabetic patients had several measured BG excursions above 130 mg/dl. A positive correlation was observed between birth weight centile and glycemia index above 130 (p < 0.03); the trend persisted for nondiabetic patients alone (p < 0.05). No significant correlation was noted between birth weight centile and average 3-day CGM values, 3-day fasting BG, average 3-day self-BG monitoring values, or diabetes screening BG value. CONCLUSIONS: The glycemia index has a better correlation with birth weight centile than BG measured by conventional methods in a mixed diabetic and nondiabetic population. Fetal exposure to maternal blood glucose excursions correlates positively with fetal growth, even in nondiabetic patients with apparently normal glucose tolerance.[1]References
- Concealed maternal blood glucose excursions correlate with birth weight centile. Taslimi, M.M., Navabi, K., Acosta, R., Helmer, A., El-Sayed, Y.Y. J. Diabetes. Sci. Technol (2008) [Pubmed]
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