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Risk of metformin failure in the treatment of women with gestational diabetes

  • Kimberly M. Herrera EMAIL logo , Jennie P. Ou , Malini D. Persad , James Bernasko , Diana Garretto and David Garry
Published/Copyright: June 7, 2021

Abstract

Objectives

To estimate the metformin failure rate in women with gestational diabetes.

Methods

The study was designed as a retrospective cohort of women diagnosed with gestational diabetes by the 75 g 2 h oral glucose tolerance test. Women were placed into two groups: metformin success (107 patients not requiring insulin therapy) or metformin failure (15 patients requiring the addition of, or, transition to insulin). Primary outcome: rate of metformin failure. Secondary outcomes: maternal and neonatal factors.

Results

The failure rate of metformin was 15% (19/122 women) in the study. The failure group was more likely to have 3 abnormal values on a 2-h 75 g oral glucose tolerance test (37% (n=7/19) vs. 15% (n=15/103), p=0.02). Patients who failed had higher average fasting blood glucose levels on the glucose tolerance test as well as on pretreatment fasting finger stick values. Those who failed metformin were diagnosed with gestational diabetes and started on metformin earlier in gestation.

Conclusions

Overall low rate of metformin failure in treatment of gestational diabetes.


Corresponding author: Kimberly M. Herrera, MD, Department of Obstetrics, Gynecology and Reproductive Medicine, Division of Maternal Fetal Medicine, Renaissance School of Medicine Stony Brook University, 101 Nicolls Rd, HSC T9 Room 030, Stony Brook, NY 11790, USA, Phone: 631-444-7650, E-mail:

  1. Research funding: None declared.

  2. Author contributions: All authors have accepted responsibility for the entire content of this manuscript and approved its submission.

  3. Competing interests: Authors state no conflict of interest.

  4. Informed consent: Informed consent was obtained from all individuals included in this study.

  5. Ethical approval: The study was approved by the Institutional Review Board at Stony Brook University (IRB 928010).

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Received: 2020-09-10
Accepted: 2021-05-18
Published Online: 2021-06-07
Published in Print: 2021-11-25

© 2021 Walter de Gruyter GmbH, Berlin/Boston

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