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Characterizing maternal glycemic control: a more informative approach using semiparametric regression.
Rhonda Vandyke1, Yan Ren, Heidi J Sucharew
1Division of Biostatistics and Epidemiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45208, USA. Rhonda.VanDyke@cchmc.org
Summary
Maternal glucose levels during pregnancy differ between babies who are large for gestational age (LGA) and appropriate for gestational age (AGA). These differences are most pronounced in the first and third trimesters, offering insights into fetal development and type 1 diabetes management.
Area of Science:
- Endocrinology
- Maternal-Fetal Medicine
- Biostatistics
Background:
- Type 1 diabetes in pregnancy requires careful glycemic control to optimize fetal outcomes.
- Understanding the dynamic relationship between maternal glucose and fetal growth is crucial for clinical management.
Purpose of the Study:
- To analyze gestational time-specific glucose concentrations in women with type 1 diabetes.
- To investigate the association between maternal glucose profiles and the delivery of large for gestational age (LGA) or appropriate for gestational age (AGA) infants.
Main Methods:
- Secondary analysis of data from a diabetes in pregnancy program.
- Application of semiparametric regression to model maternal glucose levels throughout gestation.
- Examination of time-specific associations between maternal glucose and fetal outcomes (LGA vs. AGA).
Main Results:
- Significant time-specific differences in maternal glycemic profiles were observed between mothers of LGA and AGA infants (p=0.0007).
- Maternal glucose levels were higher for AGA infants in the first trimester and mid-pregnancy.
- Maternal glucose levels were higher for LGA infants in the early third trimester.
Conclusions:
- Semiparametric regression effectively characterized longitudinal maternal glucose concentrations.
- Specific gestational periods, particularly the first and third trimesters, show distinct maternal glucose patterns associated with fetal growth.
- These findings highlight the importance of time-varying glycemic control assessment in type 1 diabetes during pregnancy.
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