Adherence to oral glucose tolerance testing in children in stage 1 of type 1 diabetes: The TEDDY study
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Updated: Nov 30, 2025

Study of In Vivo Glucose Metabolism in High-fat Diet-fed Mice Using Oral Glucose Tolerance Test OGTT and Insulin Tolerance Test ITT
Published on: January 7, 2018
Kimberly A Driscoll1, Roy Tamura2, Suzanne Bennett Johnson3
1College of Public Health & Health Professions, Department of Clinical and Health Psychology, University of Florida, Gainesville, Florida, USA.
Insights
Adherence to the oral glucose tolerance test (OGTT) for children at high risk for type 1 diabetes (T1D) was suboptimal. Improving adherence requires strategies to enhance parental engagement and understanding of T1D risk.
Area of Science:
- Pediatric Endocrinology
- Autoimmune Disease Research
- Clinical Trial Methodology
Background:
- Type 1 Diabetes (T1D) is an autoimmune disease characterized by islet cell destruction.
- Early detection of T1D development is crucial for timely intervention and management.
- The Environmental Determinants of Diabetes in the Young (TEDDY) study monitors children at high risk for T1D.
Purpose of the Study:
- To evaluate adherence to the oral glucose tolerance test (OGTT) protocol in children with multiple islet autoantibodies.
- To identify factors influencing adherence to OGTT in the early stages of T1D development.
Main Methods:
- Analysis of adherence data from children enrolled in the TEDDY study.
- Examination of demographic, familial, and maternal factors associated with OGTT completion.
- Comparison of adherence rates across different countries and healthcare settings.
Main Results:
- Overall adherence to the OGTT protocol was 62%, with significant international variations.
- Nonadherence was linked to having a family history of T1D, using local labs, and maternal underestimation of risk.
- Higher adherence was observed when mothers were satisfied with study participation and actively monitored glucose levels.
Conclusions:
- Adherence to OGTT in high-risk children for T1D is suboptimal, despite risk communication efforts.
- Strategies to improve adherence should focus on parental education, risk perception, and study engagement.
- Findings offer guidance for enhancing T1D detection in pediatric populations.
Objective:
To examine adherence to the oral glucose tolerance test (OGTT) in multiple islet autoantibody children in stage 1 of developing type 1 diabetes (T1D).
Methods:
Children are followed from birth in The Environmental Determinants of Diabetes in the Young (TEDDY) study. Completion of an OGTT is recommended every 6 months in children ≥3 years of age who are multiple islet autoantibody positive. Factors associated with adherence to the OGTT protocol were examined.
Results:
The average subject level adherence with the OGTT protocol was 62% although there were large differences across countries; Finnish participants and older children from Sweden were more adherent than participants from the United States and Germany. Factors associated with nonadherence included having a first-degree relative with T1D, using a local laboratory rather than a TEDDY center for the OGTT, and maternal underestimation of the child's risk for T1D. Children were more adherent to the OGTT if their mothers: were more satisfied with TEDDY participation, reported monitoring the child for T1D by checking blood glucose levels at home, and viewed participating in TEDDY as the primary way they were monitoring the child for T1D.
Conclusions:
In a study of children in stage 1 of T1D, adherence to an OGTT protocol was suboptimal despite extensive efforts to communicate the child's high risk to parents. These findings provide important guidance for development of strategies to improve methods for detecting progression or the development of T1D in high-risk pediatric populations.
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