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CompletedNCT00687479DRMUpdated Dec 18, 2014

Insulin Action During Pregnancy in Woman at High Risk for Gestational Diabetes

An observational study in Gestational Diabetes Mellitus, sponsored by Woman's. Completed at 1 site in United States. Open to female participants aged 18 Years to 42 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2014-12-18.

Sponsored by Woman's · Observational

Study type
Observational
Model
Case-only
Time perspective
Prospective
Enrollment
175
Ages
18 Years to 42 Years
Sex
Female
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Study summary

The project objective is to validate a new indirect estimate of insulin status in both pregnant African-American women and Caucasian women in southern Louisiana who are at risk for gestational diabetes mellitus. There are racial differences in carbohydrate metabolism that are potentially linked to complications during pregnancy and to increased risks of obesity and diabetes in later life. The investigators will explore the use of indexes of insulin status to identify the metabolic risk profile of pregnant women which may vary by race. Understanding whether there are differences which vary by race may influence clinical screening and treatment of pregnant women.

Read the detailed description

The major goal of our proposed study is to validate a new approach to estimating insulin sensitivity and ß-cell function in African-American women compared to non-Hispanic white women in southern Louisiana who are at a high risk for gestational diabetes mellitus (GDM). We will determine whether the whole body insulin sensitivity index (WBISI) and insulinogenic index (IGI) [derived from an oral glucose tolerance test (OGTT)] can be used during 24-28 weeks of pregnancy to accurately estimate the degree of insulin resistance relative to ß-cell function in women with GDM in those with impaired glucose tolerance (IGT) as well as those who are glucose tolerant. Fasting values will also be assessed using the homeostasis model assessment (HOMA-IR and HOMA-%B) to evaluate insulin resistance and ß-cell function. We will explore the potential use of these measures to define the metabolic risk profile of these pregnant women and compare them with obstetric outcomes. We will determine if there are differences in risk that vary by race. Second, given the high likelihood that women who manifest GDM will develop type 2 diabetes mellitus (DM), identification of these patients by ethnic group or other independent determinants will permit intervention after delivery that might delay or prevent the onset of type 2 DM.

02

Conditions studied

  • Gestational Diabetes Mellitus

Keywords

  • insulin sensitivity
  • insulin secretion
  • infant outcome
03

In context

Diabetes, Gestational

842 studies on the registry are indexed under Diabetes, Gestational; 198 are open to participants now.

This study's enrollment of 175 is below the median of 200 across 269 observational studies indexed under Diabetes, Gestational.

Browse Diabetes, Gestational studies →

Lead sponsor

Woman's is the lead sponsor of 19 studies on the registry; 3 are open to participants now.

Of its 5 completed or terminated interventional studies of FDA-regulated products, 1 (20%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 42 Years
Sexes eligible
Female
Accepts healthy volunteers
Yes
Sampling method
Non-probability sample

Study population

Healthy, nondiabetic pregnant African-American and Caucasian women who have been scheduled for a standard 3-hour glucose tolerance test at 24-28 weeks in the Woman's Hospital Pathology laboratory.

Inclusion criteria

  • 18-42 years of age
  • at 20-30 weeks of gestation
  • Caucasian or African-American and non-users of medications known to influence carbohydrate metabolism.

Exclusion criteria

Exclusion Criteria:

  • \<18 years or >42 years of age
  • non-Caucasian or non-African-American ethnicity
  • use of drugs that could interfere with glucose or insulin metabolism; or health problems such as diabetes mellitus or liver, heart, lung and kidney diseases
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Study design

Observational model
Case-only
Time perspective
Prospective
Enrollment
175 participants (actual)
Biospecimen retention
Samples without dna

Groups and cohorts

  • 1-NGT

    normal glucose tolerance

  • 2-GDM

    Gestational Diabetes mellitus

  • 3.GIGT

    Gestational Impaired glucose tolerance

06

What researchers measure

Primary outcomes

  1. Insulin action measures

    Time frame: 20-30 weeks of pregnancy

Secondary outcomes

  1. infant gestational age

    Time frame: time of delivery

07

Study locations

1 site
  • Woman's Hospital Pathology Laboratory
    Baton Rouge, Louisiana 70815, United States
08

References and documents

Publications

  • Kirwan JP, Huston-Presley L, Kalhan SC, Catalano PM. Clinically useful estimates of insulin sensitivity during pregnancy: validation studies in women with normal glucose tolerance and gestational diabetes mellitus. Diabetes Care. 2001 Sep;24(9):1602-7. doi: 10.2337/diacare.24.9.1602. PubMed 11522706 ↗
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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Dec 18, 2014, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT00687479
Lead sponsor
Woman's
Collaborators
Baton Rouge Area Foundation
Responsible party
Karen Elkind-Hirsch (Director of Research, Woman's) — Principal investigator
First posted
May 30, 2008
Start date
Jan 2006
Primary completion
Aug 2009
Completion
Dec 2009
Last update
Dec 18, 2014

Study contacts

Karen E Elkind-Hirsch, Ph.D.
principal investigator · Woman's Health Research Institute
Beverly Ogden, MD
principal investigator · Woman's Pathology Laboratory

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Dec 2014. You cannot join it, but the record below documents what was studied.

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