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Gestational DiabetesNCT05430204

Continuous Glucose Monitoring for Screening for Diabetes in Pregnancy

A study testing Group 1: one-hour GCT and Group 2: CGM placement in people with Gestational Diabetes, run by The University of Texas Health Science Center, Houston at 1 site in United States.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

The purpose of this study is to evaluate whether Continuous glucose monitoring (CGM) for diagnosis of gestational diabetes mellitus (GDM) improves maternal and neonatal outcomes related to GDM and to evaluate whether CGM for GDM diagnosis reduces the health system costs for mother-infant dyads compared to usual care Read more about this study

Who is it for?
Ages 18 years and older, women only
Conditions the study is for
Gestational Diabetes
What is being tested?
Group 1: one-hour GCT and Group 2: CGM placement
Type of treatment
Medical device
Could I receive a placebo?
No, everyone receives an active treatment
How many people
1,628 participants
Where
1 siteUnited States
Study dates
7 Mar 2023to 16 Sep 2024
Phase
Interventional
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • Women only
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • 24-30 weeks gestation undergoing GDM screening

Who cannot join

  • Known diagnosis of Type I and II DM
  • History of bariatric surgery
  • Major fetal anomalies
  • Unwilling to use CGM for GDM screening
  • Incarcerated subjects
  • History of allergic reaction to any of CGM metals or adhesives in contact with the skin

Trial locations and contacts

1 site in 1 country.

United States1 site
  • The University of Texas Health Science Center at Houston

    Houston, Texas, 77030

Other trials in United States

About this study

Official title: Continuous Glucose Monitoring for Screening for Diabetes in Pregnancy:A Comparative Effectiveness Randomized Control Trial (PRECISE)

The purpose of this study is to evaluate whether Continuous glucose monitoring (CGM) for diagnosis of gestational diabetes mellitus (GDM) improves maternal and neonatal outcomes related to GDM and to evaluate whether CGM for GDM diagnosis reduces the health system costs for mother-infant dyads compared to usual care

Being tested
Group 1: one-hour GCT, Group 2: CGM placement
Medical subject headings
Diabetes, Gestational

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Group 1: one-hour GCTDevice

    Group I will be comprised of one-hour 50g glucose challenge participants for diagnosis of GDM..Diagnosis will be based on 1-hour glucose challenge test results: 1-hour result ≤ 130 mg/dL, the participant will have passed the challenge test. 1-hour result ≥ 130 mg/dL will complete a three-hour 100g glucose tolerance test. If two out of three values are elevated per Carpenter Coustan criteria , the participant will be diagnosed with GDM and treated according to the standard of care. This group will also receive the CGM.CGM data will not be observed until completion of study and will not be available to provider. Participants will return transmitter at follow up visit after completion of 7 days.Group I will receive routine prenatal care follow-up depending upon one-hour glucose results as written above.

  • Group 2: CGM placementDevice

    CGM will consist of using the Dexcom G6 Pro device. The device will be placed on the abdomen or the arm.The Dexcom G6/G7 Pro App will be downloaded on the patient's phone. A patient profile will be created on the Dexcom Clarity portal .The patient will receive an email to link their portal to the clinic's portal.The patient will receive a message through Epic electronic medical records to remove the CGM 10 days after placement.The device will be reviewed by the Diabetes team 48 hours after CGM is removed. The recommended range for glucose during pregnancy is defined as 63-140 mg/dL .The time above range has been defined as ≥ 140 mg/dL, greater than 10% of total CGM placement time. The following criteria will currently be used to diagnose gestational diabetes in the CGM group:

    • Time above range (≥140 mg/dL) ≥ 10% of the time while using CGM or
    • Average glucose≥130 mg/dL or
    • Any glucose value ≥200 mg/dL
Study groups in NCT05430204
Study groupRoleWhat they receive
one-hour Glucose tolerance test (GCT)Active comparatorNot described
Receives: Device: Group 1: one-hour GCT
CGM screeningExperimentalNot described
Receives: Device: Group 2: CGM placement

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Number of Neonates That Show Composite Adverse Neonatal Outcome

    Composite adverse neonatal outcome include one or more of the following:

    • Large for Gestational Age(LGA) is described as weight over 90th percentile of the expected value according to gestational age (using the nomogram by Duryea EL et al)
    • Shoulder Dystocia is defined as the need for any extra maneuvers, other than gentle downward traction of the fetal head to deliver the fetal body after the fetal head has been delivered
    • Birth injury: skull, clavicular, humerus fracture, or brachial plexus injury
    • Neonatal hypoglycemia: less than 40 mg/dL in the first 24 hours of life and less than 50 mg/dL after or requiring medical therapy
    • Respiratory distress is described as the need for at least 4 hours of respiratory support with supplemental oxygen, continuous positive airway pressure, or ventilation at the first 24 hours of life
    • Fetal or neonatal death (within 28 days of birth)

    Measured: From birth to about 28 days of life.

  2. Number of Neonates That Show Adverse Neonatal Outcome of Large for Gestational Age(LGA)

    LGA is described as weight over 90th percentile of the expected value according to gestational age (using the nomogram by Duryea EL et al)

    Measured: at time of birth

  3. Number of Neonates That Show Adverse Neonatal Outcome of Shoulder Dystocia

    Shoulder dystocia is defined as the need for any extra maneuvers, other than gentle downward traction of the fetal head to deliver the fetal body after the fetal head has been delivered

    Measured: at time of birth

  4. Number of Neonates That Show Adverse Neonatal Outcome of Birth Injury

    Birth injury: skull, clavicular, humerus fracture, or brachial plexus injury

    Measured: at time of birth

  5. Number of Neonates That Show Adverse Neonatal Outcome of Neonatal Hypoglycemia

    Neonatal hypoglycemia: less than 40 mg/dL in the first 24 hours of life and less than 50 mg/dL after or requiring medical therapy

    Measured: from birth to discharge (about 3-15 days)

  6. Number of Neonates That Show Adverse Neonatal Outcome of Respiratory Distress

    Respiratory distress is described as the need for at least 4 hours of respiratory support with supplemental oxygen, continuous positive airway pressure, or ventilation at the first 24 hours of life

    Measured: from birth to discharge (about 3-15 days)

  7. Number of Fetal or Neonatal Deaths

    Measured: within 28 days of birth

Secondary outcomes (31)
  1. Feasibility as Assessed by the Number of Participants Who Complete the CGM Diagnostic Testing

    Measured: From enrollment to 6 weeks post partum, on average 21 weeks

  2. Number of Women That Use Diabetic Medication During Pregnancy

    diabetic medication is described as any glycemic control agent

    Measured: From enrollment to 6 weeks post partum, on average 21 weeks

  3. Number of Women That Show Polyhydramnios During Pregnancy Not Related to Known Fetal Anomaly

    Measured: From enrollment to delivery

  4. Number of Women That Have Preterm Birth

    Pre term birth is described as delivery less than 37 weeks of gestation

    Measured: at time of birth

  5. Number of Women That Undergo Induced Labor

    Measured: at time of birth

  6. Number of Women That Experience Pregnancy Induced Hypertension

    Measured: From enrollment to 6 weeks post partum, on average 21 weeks

  7. Number of Women That Experience Eclampsia: Seizures

    Measured: From enrollment to 6 weeks post partum, on average 21 weeks

  8. Number of Women Admitted Due to Poor Glucose Control

    Measured: From enrollment up to delivery

  9. Number of Women With Primary Cesarean Section

    Measured: at time of birth

  10. Number of Women With Postpartum Hemorrhage: Defined as Greater Then 1000ml

    Measured: From enrollment to 6 weeks post partum, on average 21 weeks

  11. Number of Women With Endometritis

    Measured: From enrollment to 6 weeks post partum, on average 21 weeks

  12. Number of Women With Wound Complications

    Measured: From enrollment to 6 weeks post partum, on average 21 weeks

  13. Number of Women With Diagnosis of Type 2 Diabetes During Postpartum

    Measured: birth to 6 weeks postpartum

  14. Number of Neonates With Apgar Score Less Than 7

    The Apgar score is determined by evaluating the newborn baby on each of five criteria (appearance, pulse, grimace, activity, respiration) on a scale from zero to two, then summing the five values obtained. The total score ranges from zero to 10. A higher score indicates a better outcome.

    Measured: 5 minutes after birth

  15. Number of Neonates That Are Admitted to the Neonatal Intensive Care Unit (NICU)

    Measured: birth to time of discharge from NICU (about 15 days)

  16. NICU Length of Stay

    Measured: birth to time of discharge from NICU (about 15 days)

  17. Number of Neonates With Hyperbilirubinemia Requiring Phototherapy

    Measured: birth to discharge (about 3-15 days)

  18. Number of Neonates With Need for Intravenous or Oral Administration Glucose Therapy

    Measured: birth to discharge (about 3-15 days)

  19. Number of Neonates That Are Small for Gestational Age

    Small for gestational age, defined as a weight below 10th percentile of the expected value according to gestational age (using the nomogram published by Duryea EL et al)

    Measured: at time of birth

  20. Number of Participants Who Breastfed Their Babies

    Measured: from birth to 6 weeks postpartum

  21. Number of Participants Who Formula Fed Their Babies

    Measured: from birth to 6 weeks postpartum

  22. Maximum Bilirubin Level - Neonates

    Measured: birth to discharge (about 3 -15 days)

  23. Cord Arterial pH

    Measured: at time of birth

  24. Number of Neonates With Polycythemia

    Measured: birth to discharge (about 3 -15 days)

  25. Number of Women That Experience Preeclampsia With Severe Features

    Measured: From enrollment to 6 weeks post partum, on average 21 weeks

  26. Number of Women That Experience Super Imposed Preeclampsia

    Measured: From enrollment to 6 weeks post partum, on average 21 weeks

  27. Number of Women With Need for Blood Transfusion

    Measured: From enrollment to 6 weeks post partum, on average 21 weeks

  28. Number of Participants With Ultrasound Diagnosis of Estimated Fetal Weight >90%Ile in the Third Trimester

    Measured: Third trimester (≥28 weeks gestation through delivery)

  29. Number of Women That Experience HELLP Syndrome

    HELLP syndrome: a group of symptoms in pregnant women characterized by hemolysis (H), elevated liver enzymes (EL), and/or low platelet (LP) count, assessed according to ACOG guidelines.

    Measured: From enrollment to 6 weeks post partum, on average 21 weeks

  30. Cord Venous pH

    Measured: at time of birth

  31. Total Health System Costs for Mothers and Infants

    Measured: From enrollment to 6 weeks post partum, on average 21 weeks

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted24 Jun 2022
  2. Study start7 Mar 2023
  3. Primary completion2 Aug 2024
  4. Study completion16 Sep 2024

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Diagnosis
Allocation
Randomised
Intervention model
Parallel groups
Masking
Single blind
Who is masked
Outcomes assessor
Enrolment
1,628 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT05430204
Sponsor's protocol ID
HSC-MS-22-0153
Status last verified
Nov 2025
First submitted
14 Jun 2022
Last updated
4 Dec 2025
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
Yes
Individual data sharing
No

Publications

  • Fishel Bartal M, Ashby Cornthwaite J, Ghafir D, Ward C, Nazeer SA, Blackwell SC, Pedroza C, Chauhan SP, Sibai BM. Continuous glucose monitoring in individuals undergoing gestational diabetes screening. Am J Obstet Gynecol. 2023 Oct;229(4):441.e1-441.e14. doi: 10.1016/j.ajog.2023.04.021. Epub 2023 Apr 23.

    PubMed 37088275

Questions about this trial

What is this clinical trial studying?

A study testing Group 1: one-hour GCT and Group 2: CGM placement in people with Gestational Diabetes, run by The University of Texas Health Science Center, Houston at 1 site in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 1 inclusion and 6 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 4 Dec 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

Yes. Results are posted in the registry (first posted 4 Dec 2025). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Number of Neonates That Show Composite Adverse Neonatal Outcome (time frame: From birth to about 28 days of life.). The study lists 7 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT05430204, which also lists 1 linked publication.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 4 Dec 2025.

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