Screening gestational diabetes mellitus: The role of maternal age

  • C.-H. K
  • S.-C. C
  • C.-T. F
  • et al.
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Abstract

Objective Using a specific cutoff of fasting plasma glucose (FPG) to screen gestational diabetes mellitus (GDM) can reduce the use of oral glucose tolerance tests (OGTT). Since the prevalence of GDM increases with age, this screening method may not be appropriate in healthcare systems where women become pregnant at older ages. Therefore, we aimed to develop a screening algorithm for GDM that takes maternal age into consideration. Methods We included 945 pregnant women without history of GDM who received 75g OGTT to diagnose GDM in 2011. Screening algorithms using FPG with or without age were developed. Another 362 pregnant women were recruited in 2013+/-2015 as the validation cohort. Results Using FPG criteria alone, more GDM diagnoses were missed in women 35 years than in women <35 years (13.2% vs. 5.8%, p <0.001). Among GDM women 35 years, 63.6% had FPG <92 mg/dL (5.1 mmol/L). Use of the algorithm with an age plus FPGdegree cutoff could reduce the use of OGTT (OGTT%) from 77.6% to 62.9%, while maintaining good sensitivity (from 91.9% to 90.2%) and specificity (from 100% to 100%). Similar reduction in OGTT% was found in the validation cohort (from 86.4% to 76.8%). In the simulation, if the percentage of women 35 years were 40% or more, the screening algorithm with an age plus FPGdegree cutoff could further reduce OGTT% by 11.0%-18.8%. Conclusions A screening algorithm for GDM that takes maternal age into consideration can reduce the use of OGTT when women become pregnant at older ages., Copyright ©2017 Kuo et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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C.-H., K., S.-C., C., C.-T., F., F.-J., N., E.-T., W., S.-Y., L., … C.-N., L. (2017). Screening gestational diabetes mellitus: The role of maternal age. PLoS ONE, 12(3), e0173049. https://doi.org/http://dx.doi.org/10.1371/journal.pone.0173049

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