Clinical Trials Logo

Clinical Trial Summary

The purpose of this study is to compare the positive and negative effects of Dex4® tablets, as an alternative form of fast acting carbohydrate, compared to the current standard diagnostic test, glucose beverage. The investigators hypothesis that because of their availability in solid, chewable form, variety of flavours and lack of carbonation, Dex4® tablets may result in fewer side effects than glucose beverage and provide an equivalent carbohydrate challenge for diagnosis of gestational diabetes.

Clinical Trial Description

The project is a population-based, prospective randomized crossover study. Women who fall into the screen positive group of the 50g GCT (1 hour serum glucose of 7.8-11 mmol/L) will be offered participation in the study. 28 participants will be recruited and will be randomly assigned using a pre-populated allocation table to take either the standard OGTT test (75g of glucose beverage) first or the alternative OGTT test (21 Dex4® tablets) first. The first test will be referred to as OGTT-1 and the second test will be referred to as OGTT-2. After completing OGTT-1 at the first test appointment, a questionnaire about pregnancy, health, diet and exercise habits, and side effects from the first test will be completed by the participant (Questionnaire A). After completing OGTT-2 at their second test appointment, a questionnaire about side effects from the second test and test preference will be completed by the participant (Questionnaire B). Each woman will complete both tests within one week and each subject will serve as their own control. Results will be kept blinded in the case report forms until both OGTT tests are done. Serum glucose will be measured using the same internationally standardised glucose-oxidase method (RocheDiagnosis) in the Sunnybrook Biochemistry lab. After serum glucose measurement, all results will be sent to the research team but only the standard of care glucose beverage test data will appear in electronic (or classical) medical records and be used for GDM diagnosis. The participant population consists of 28 pregnant women between 24-28 weeks' gestation who have screened positive for gestational diabetes on the 50g glucose challenge test. The main drawback to participation is that women will have to undergo two fasting, 1 hour and 2 hour glucose values within one week. Risks involved with participating in the study include: possibility of pain, bruising, swelling or infection related to drawing blood, allergic reaction symptoms such as itching, facial swelling and anaphylaxis upon consumption if the participant has an allergy to corn based products such as dextrose. These risks will be minimized by screening patients for dextrose allergy before having them sign the informed consent form. The benefit may not be directly to the patient as they will still need to complete the standard 75g glucose beverage test but they will be contributing to new knowledge on alternatives to the standard test that may benefit other pregnant women, including themselves, in the future. The ultimate goal of this project is to improve women's health by 1) allowing more women to be screened for GDM and 2) providing an equivalent glucose beverage alternative with fewer side effects, making the screening process more comfortable for patients who cannot tolerate glucose beverage. Improving the tolerability of the test is important because there is growing evidence that GDM significantly increases the risk of short and long term adverse consequences for both the fetus and the mother (10,11). Accurate diagnosis may allow women to implement preventative measures such as a healthy lifestyle, which has shown to be effective in preventing T2DM in women with previous GDM (19,20). There have been recent quality control issues with the commercially available glucose beverage product (16), so this alternative test could become the standard test if the dose calibration is found to be more reliable. Primary objective 1 (PO-1): to determine if Dex4® tablets is equivalent to glucose beverage for use in the 2-hr 75g OGTT in pregnant women between 24-30 weeks gestation who have screened positive for GDM. Secondary objective (SO-1): to determine if women have fewer side effects and prefer the standard (glucose beverage) OGTT test or the alternative (Dex4® tablets) OGTT test ;

Study Design

Related Conditions & MeSH terms

NCT number NCT05115188
Study type Interventional
Source Sunnybrook Health Sciences Centre
Status Not yet recruiting
Phase Phase 2
Start date January 2022
Completion date March 2023

See also
  Status Clinical Trial Phase
Recruiting NCT02577536 - PregSource: Crowdsourcing to Understand Pregnancy
Completed NCT01940003 - Effects of an Aquatic Physical Exercise Program on Glycaemic Control and Perinatal Outcomes of Gestational Diabetes: Study Protocol for a Randomized Controlled Trial N/A
Completed NCT02960295 - The Virtual Visit for Women With Gestational Diabetes N/A
Completed NCT01919476 - Postprandial Response to Almond Consumption in Overweight Hispanic Pregnant Women N/A
Enrolling by invitation NCT03307486 - Gestational Diabetes: a Cohort Study N/A
Recruiting NCT04417452 - Long-term Outcome After Gestational Diabetes and Diabetes in Pregnancy
Completed NCT02968628 - Effect of Maternal Diabetes on Brain Development, as Measured by Neonatal Electroencephalogram (EEG)
Active, not recruiting NCT04222348 - MeDiGes Study: Metformine Use in Gestational Diabetes Phase 3
Completed NCT03007186 - Glucose Monitoring During Threatening Preterm Birth in Patients With and Without Gestational Diabetes Mellitus
Completed NCT00069576 - Gestational Diabetes Mellitus Trial (GDM) N/A
Recruiting NCT04866823 - Meals for Moms: Medically-Tailored Meals for Women Who Had Gestational Diabetes N/A
Recruiting NCT02893072 - Medical Nutrition Therapy Intervention Program for Women With Gestational Diabetes--a Prospective Study N/A
Completed NCT02770079 - Insulin Sensitivity and Secretion During Pregnancy and Post Partum in Women With Gestational Diabetes.
Completed NCT00681460 - Metformin in Gestational Diabetes Mellitus N/A
Recruiting NCT03117543 - Diagnostic Approaches in Gestational Diabetes and Impact of Ethnicity
Completed NCT02931656 - Acute Effects of an Aquatic Physical Exercise on Glycemic Control of Gestational Diabetes N/A
Completed NCT01837680 - Glycemic Control Using Insulin Levemir Versus Insulin NPH for Diabetes in Pregnancy N/A
Completed NCT01105455 - The Effect of a Low Glycemic Index Diet on Blood Sugar Control in Pregnant Women at Risk for Gestational Diabetes N/A
Terminated NCT00514618 - Outpatient Cervical Ripening With Orally Administered Misoprostol in Diabetics N/A
Active, not recruiting NCT03607799 - A Culturally-tailored Personalized Nutrition Intervention in South Asian Women at Risk of Gestational Diabetes N/A