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01-11-2019 | Neonatal Hypoglycemia | Original Article

Metformin in overweight and obese women with gestational diabetes: a propensity score-matched study

Authors: Rita Bettencourt-Silva, João Sérgio Neves, Maria João Ferreira, Pedro Souteiro, Sandra Belo, Ana Isabel Oliveira, Davide Carvalho, Gabriela Namora, Nuno Montenegro, Joana Queirós

Published in: Endocrine | Issue 2/2019

Abstract

Purpose

Obesity and gestational diabetes mellitus (GDM) have an independent negative impact in pregnancy outcomes. Excessive gestational weight gain (GWG) represents an additional high-risk condition for adverse outcomes. The aims of this study were to evaluate the potential effect of metformin in GWG in overweight or obese women with GDM, to report our experience and to assess metformin’s safety in this population.

Methods

Retrospective observational cohort study involving pregnant women with GDM and pregestational overweight or obesity. Demographic, anthropometric, glycemic control data, obstetric, fetal and neonatal outcomes were evaluated. The sample was divided into two groups according to metformin treatment. A propensity score-matched analysis was performed using age, initial body mass index (BMI), trimester at GDM diagnosis and previous history of GDM or macrosomia as covariates.

Results

Of the 457 enrolled in the study, 177 (38.7%) were treated with metformin. Two groups of 130 well matched patients were balanced regarding baseline characteristics. Women in metformin group had significantly less excessive GWG (29.23% vs. 42.31%, OR 0.56, 95% CI 0.34–0.94, p = 0.028) and more adequate GWG (36.92% vs. 23.08%, OR 1.95, 95% CI 1.14–3.35, p = 0.015). No significant differences were found between both groups regarding glycemic control, rate of insulinization, and obstetric, fetal, and neonatal outcomes.

Conclusions

This study highlights metformin as an important and safe tool to prevent excessive GWG and promote adequate GWG in overweight or obese women with GDM, regardless of age, BMI, timing of GDM diagnosis, previous history of GDM or macrosomia.

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Title: Metformin in overweight and obese women with gestational diabetes: a propensity score-matched study
Authors: Rita Bettencourt-Silva
João Sérgio Neves
Maria João Ferreira
Pedro Souteiro
Sandra Belo
Ana Isabel Oliveira
Davide Carvalho
Gabriela Namora
Nuno Montenegro
Joana Queirós
Publication date: 01-11-2019
Publisher: Springer US
Keywords: Neonatal Hypoglycemia
Obesity
Obesity
Metformin
Gestational Diabetes
Gestational Diabetes
Overweight
Published in: Endocrine / Issue 2/2019
Print ISSN: 1355-008X
Electronic ISSN: 1559-0100
DOI: https://doi.org/10.1007/s12020-019-02043-3

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