RCT Metformin for Reduction of Gestational Diabetes Mellitus Effects

NCT ID: NCT02980276

Last Updated: 2025-03-17

Study Results

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Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

PHASE3

Total Enrollment

535 participants

Study Classification

INTERVENTIONAL

Study Start Date

2017-06-06

Study Completion Date

2023-04-13

Brief Summary

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The overall objective of the EMERGE trial is to determine whether metformin + usual care, compared to placebo + usual care (introduced at the time of initial diagnosis of GDM), reduces a) the need for insulin use, or hyperglycemia (primary outcome measure); b) excessive maternal weight gain; c) maternal and neonatal morbidities and, d) cost of treatment for women with Gestational Diabetes Mellitus.

Detailed Description

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Conditions

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Gestational Diabetes

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

QUADRUPLE

Participants Caregivers Investigators Outcome Assessors

Study Groups

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Treatment

Participants randomised to the treatment arm will receive active metformin in addition to standard care. Metformin tablets will be titrated according to a dosing schedule to achieve the pre-specified glucose targets. Tablets will be in 500mg doses and will commence at 1 tablet per day (500mg) increasing to a maximum of 5 tablets per day (2500mg).

Group Type ACTIVE_COMPARATOR

Metformin Hydrochloride

Intervention Type DRUG

Women randomised to the metformin group will receive metformin 500mg once daily, with the dose titrated upwards every 2 days over 10 days increasing to a maximum of 2500mg Metformin daily (5 tablets) or maximum tolerated dose, in addition to usual care (exercise and MNT), and taken until delivery.

Control

Participants randomised to the placebo arm will receive placebo in addition to standard care. Placebo will be titrated according to the dosing schedule to achieve the pre-specified glucose targets. Placebo tablets will commence at 1 tablet per day and will be increased to a maximum of 5 tablets per day over 10 days as with the treatment group.

Group Type PLACEBO_COMPARATOR

Placebo

Intervention Type OTHER

Women randomised to the placebo group will receive 1 placebo tablet once daily, with the dose titrated upwards every 2 days over 10 days increasing to a maximum of five placebo tablets daily, in addition to usual care (exercise and MNT), and taken until delivery.

Interventions

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Metformin Hydrochloride

Women randomised to the metformin group will receive metformin 500mg once daily, with the dose titrated upwards every 2 days over 10 days increasing to a maximum of 2500mg Metformin daily (5 tablets) or maximum tolerated dose, in addition to usual care (exercise and MNT), and taken until delivery.

Intervention Type DRUG

Placebo

Women randomised to the placebo group will receive 1 placebo tablet once daily, with the dose titrated upwards every 2 days over 10 days increasing to a maximum of five placebo tablets daily, in addition to usual care (exercise and MNT), and taken until delivery.

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

1. Willing and able to provide written informed consent
2. Participants aged 18-50
3. Pregnancy gestation up to 28 weeks (+ 6 days) confirmed by positive pregnancy test
4. Singleton pregnancy as determined by scan
5. Positive diagnosis of Gestational Diabetes Mellitus on a Oral Glucose Tolerance Test (OGTT) according to the International Association of the Diabetes and Pregnancy Study Groups (IADPSG) criteria if any one of the following are achieved: i) Fasting glucose \>/= 5.1mmol/l and \<7mmol/l, or ii) 1 hour post glucose load of \>/=10mmol/l, or iii) 2 hour post glucose load of \>/=8.5 mmol/l and \<11.1mmo/l
6. Resident in the locality and intending to deliver within the trial site

Exclusion Criteria

1. Participants who have an established diagnosis of diabetes (Type 1, Type 2, Monogenic or secondary)
2. Participants with a fasting glucose \> 7mmol/l or a 2h value \> 11.1 mmol/l
3. Multiple pregnancies (twins, triplets etc.) as determined by scan
4. Known intolerance to metformin
5. Known contraindication to the use of metformin which include: i) renal insufficiency (defined as serum creatinine of greater than 130 µmol/L or creatinine clearance \<60 ml/min), ii) moderate to severe liver dysfunction (aspartate aminotransferase (AST) and alanine aminotransferase (ALT) greater than 3 times the upper limit of normal, iii) shock or sepsis, and iv) previous hypersensitivity to metformin
6. Major congenital malformations or an abnormally deemed unsuitable for metformin by the site PI or attending consultant
7. Known small for gestational age (Small for gestational age (SGA) refers to foetal growth less than the 10th percentile (RCOG, 2014), or if foetal growth is deemed unsatisfactory by the treating obstetrician)
8. Known gestational hypertension or pre-eclampsia or ruptured membranes
9. Participants who have a history of drug or alcohol use that, in the opinion of the investigator, would interfere with adherence to study requirements
10. Participants with significant gastrointestinal problems such as severe vomiting, Crohn's disease or colitis which will inadvertently affect absorption of the study drug
11. Participants with congestive heart failure or history of congestive heart failure
12. Participants with serious mental illness which would affect adherence to study medication or compliance with study protocol in the opinion of the investigator
13. Patients with rare hereditary problems of galactose intolerance, the Lapp lactase deficiency or glucose-galactose malabsorption
Minimum Eligible Age

18 Years

Maximum Eligible Age

50 Years

Eligible Sex

FEMALE

Accepts Healthy Volunteers

No

Sponsors

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Health Research Board, Ireland

OTHER

Sponsor Role collaborator

HRB Clinical Research Facility Galway

OTHER

Sponsor Role collaborator

University College Hospital Galway

OTHER

Sponsor Role collaborator

Portiuncula University Hospital

UNKNOWN

Sponsor Role collaborator

University Hospital of Limerick

OTHER

Sponsor Role collaborator

University Maternity Hospital Limerick

UNKNOWN

Sponsor Role collaborator

Clinical Research Support Unit, University of Limerick

UNKNOWN

Sponsor Role collaborator

National University of Ireland, Galway, Ireland

OTHER

Sponsor Role lead

Responsible Party

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Fidelma Dunne

Prof. Fidelma Dunne

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Prof. Fidelma Dunne

Role: PRINCIPAL_INVESTIGATOR

National University of Ireland, Galway, Ireland

Locations

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Portiuncula University Hospital

Ballinasloe, Galway, Ireland

Site Status

University Hospital Galway

Galway, , Ireland

Site Status

Countries

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Ireland

References

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Dunne F, Newman C, Alvarez-Iglesias A, O'Shea P, Devane D, Gillespie P, Egan A, O'Donnell M, Smyth A. Metformin and small for gestational age babies: findings of a randomised placebo-controlled clinical trial of metformin in gestational diabetes (EMERGE). Diabetologia. 2024 Dec;67(12):2660-2666. doi: 10.1007/s00125-024-06252-y. Epub 2024 Aug 31.

Reference Type DERIVED
PMID: 39215812 (View on PubMed)

Dunne F, Newman C, Alvarez-Iglesias A, Ferguson J, Smyth A, Browne M, O'Shea P, Devane D, Gillespie P, Bogdanet D, Kgosidialwa O, Egan A, Finn Y, Gaffney G, Khattak A, O'Keeffe D, Liew A, O'Donnell M. Early Metformin in Gestational Diabetes: A Randomized Clinical Trial. JAMA. 2023 Oct 24;330(16):1547-1556. doi: 10.1001/jama.2023.19869.

Reference Type DERIVED
PMID: 37786390 (View on PubMed)

Dunne F, Newman C, Devane D, Smyth A, Alvarez-Iglesias A, Gillespie P, Browne M, O'Donnell M. A randomised placebo-controlled trial of the effectiveness of early metformin in addition to usual care in the reduction of gestational diabetes mellitus effects (EMERGE): study protocol. Trials. 2022 Sep 21;23(1):795. doi: 10.1186/s13063-022-06694-y.

Reference Type DERIVED
PMID: 36131291 (View on PubMed)

Provided Documents

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Document Type: Study Protocol

View Document

Document Type: Statistical Analysis Plan

View Document

Other Identifiers

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NUIG-2016-01

Identifier Type: -

Identifier Source: org_study_id

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