Blood Glucose Response to Meals of Varying Glycemic Index in Youth With Type 1 & 2 Diabetes

Study Overview
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Brief Summary
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Research to date suggests that the selection of lower glycemic index foods, that is, foods provoking a slower, more sustained blood sugar response, may result in improved glycemic control in youth with diabetes. However, there is currently insufficient data to support practice recommendations. The purpose of this pilot study is to test the blood glucose response to low and high glycemic index meals in youth with diabetes using continuous blood glucose monitoring, and to determine whether the effect of glycemic index differs by regimen or diagnosis. In this pilot study up to 42 youth with type 1 diabetes or impaired glucose metabolism (elevated fasting glucose, insulin resistance, or type 2 diabetes) will participate in 5 days of continuous blood glucose monitoring during which they will receive both low and high glycemic index meals. Children will be provided with 1 full day of low glycemic index meals and 1 full day of high glycemic index meals in a supervised setting in randomized order. Each of these test days will be preceded by a standard evening meal and snack. Continuous blood glucose monitoring will also be conducted during regular food intake ad libidum away from the clinic, as well as during one day of instructed low glycemic meals at home. All food intake, insulin, and blood glucose self-monitoring will be recorded. While in the clinic, measures of satiety and acceptability of the food will also be obtained. Data analysis will include indices of blood glucose levels and variability.

Official Title
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Blood Glucose Response to Meals of Varying Glycemic Index in Youth With Type 1 & 2 Diabetes

Conditions
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Type 1 Diabetes, Type 2 Diabetes, Impaired Glucose Metabolism

Intervention / Treatment
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* Behavioral: Diet
* Other: Standard diet


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: diagnosed with type 1 diabetes for a minimum of 1 year with insulin dose greater than or equal to 0.5 u/kg/day, or diagnosed with elevated fasting glucose, insulin resistance, or type 2 diabetes age 7 to 16 Exclusion Criteria: dietary restrictions that would preclude eating the study diet comorbid chronic illness requiring daily medical management comorbid major psychiatric diagnosis non-English speaking/writing

Ages Eligible for Study
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Minimum Age: 7 Years
Maximum Age: 16 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Intervention Model: Crossover Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Other: HGI<br>High/standard glycemic index diet | Other: Standard diet<br>* Standard diet meeting American Diabetes Association guidelines<br>|
| Experimental: LGI<br>Low glycemic index diet | Behavioral: Diet<br>* Whole-foods, low glycemic index diet<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Blood glucose level |  |  | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Diabetes, Children, Adolescents, Diet, Glycemic index