Randomized Clinical Trial to Assess the Effectiveness of the GlucoWatch Biographer

NCT ID: NCT00069628

Last Updated: 2016-09-05

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: PHASE4
• Total Enrollment: 200 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2003-07-31
• Study Completion Date: 2004-11-30

Brief Summary

This study will evaluate the safety and effectiveness of a continuous glucose monitor in children with Type 1 diabetes mellitus (T1DM).

Detailed Description

Intensive control of blood glucose levels has been shown to substantially prevent or delay complications of T1DM in adolescents and adults. The major limitation to implementation of intensive glycemic control is hypoglycemia. Younger children may be at increased risk for hypoglycemia, and the risk/benefit ratio of intensive glycemic control may be less favorable in this population. The Diabetes Research in Children Network (DirecNet) was established to evaluate the feasibility and effectiveness of intensive glycemic control in children with T1DM.

This study is designed to evaluate glycemic control, hypoglycemia, and quality of life when using a GlucoWatch G2TM Biographer (GW2B) versus standard care. Children in the study will use the GW2B in their home environment in order to assess if the GW2B can help to safely lower blood sugar levels (as measured by the glycosylated hemoglobin test), to learn how using the GW2B affects the daily lives of children with diabetes, and to find out if there are any drawbacks to using the GlucoWatch.

As part of the study, participants in the intervention group will also use a second glucose monitoring device called the Continuous Glucose Monitoring System (CGMS). The CGMS will be inserted at baseline and at Months 3 and 6; it will be worn for three days after each visit. The CGMS will be used to measure changes in biochemical hypoglycemia.

Participants at five participating centers will include a total of 200 children and adolescents with type 1 diabetes. Of the 200 children, 100 will be randomized to wear the GW2B and 100 will be randomized to usual care without GW2B. Each patient will be provided with a personal computer for weekly downloading of data and completion of questionnaires regarding hypoglycemia. Phone contacts will be made with the patients after Weeks 1, 2, and 4, then every 4 weeks to review their diabetes management. At Months 3, 6, 9 and 12, a follow-up visit will be performed to measure HbA1c. The CGMS sensor will be inserted to assess hypoglycemia at baseline and Months 3 and 6. At the 6-month follow-up visit, psychosocial questionnaires will also be administered.

Conditions

Diabetes Mellitus, Insulin-Dependent

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: FACTORIAL
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Interventions

GlucoWatch® G2™ Biographer (GW2B)

Intervention Type: DEVICE

Continuous Glucose Monitoring System (CGMS)

Intervention Type: DEVICE

Eligibility Criteria

Inclusion Criteria

• Clinical diagnosis of type 1 diabetes
• Insulin therapy (either a pump or at least 2 injections per day) for at least one year prior to study entry
• HbA1c between 7.0 and 11.0%
• Stable insulin regimen for the 2 months prior to study entry and no plans to switch the modality of insulin administration during the next 6 months (e.g., injection user switching to a pump, pump user switching to injections, or the addition of Lantus [Glargine] insulin)
• Agree to comply with study requirements, including the performance of at least 4 fingerstick glucose checks a day using a home glucose monitor
• Comprehend written English
• Female participants must not intend to become pregnant during the next 6 months
• Plan to remain in the area of the clinical center during the next 6 months

• Minimum Eligible Age: 7 Years
• Maximum Eligible Age: 17 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)

NIH

Sponsor Role: collaborator

Jaeb Center for Health Research

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

William V Tamborlane, MD

Role: STUDY_CHAIR

Yale University

Locations

Division of Pediatric Endocrinology and Diabetes, Stanford University

Stanford, California, United States

Barbara Davis Center for Childhood Diabetes, University of Colorado

Denver, Colorado, United States

Department of Pediatrics, Yale University School of Medicine

New Haven, Connecticut, United States

Nemours Children's Clinic

Jacksonville, Florida, United States

Jaeb Center for Health Research

Tampa, Florida, United States

Department of Pediatrics, University of Iowa Carver College of Medicine

Iowa City, Iowa, United States

Countries

United States

References

Tansey MJ, Beck RW, Buckingham BA, Mauras N, Fiallo-Scharer R, Xing D, Killman C, Tamborlane WV, Ruedy KJ; Diabetes Research in Children Network (DirecNet) Study Group. Accuracy of the modified Continuous Glucose Monitoring System (CGMS) sensor in an outpatient setting: results from a diabetes research in children network (DirecNet) study. Diabetes Technol Ther. 2005 Feb;7(1):109-14. doi: 10.1089/dia.2005.7.109.

Reference Type: BACKGROUND

PMID: 15738708 (View on PubMed)

Tamborlane WV, Kollman C, Steffes MW, Ruedy KJ, Dongyuan X, Beck RW, Chase P, Fox LA, Wilson DM, Tsalikian E; Diabetes Research in Children Network (DirecNet) Study Group. Comparison of fingerstick hemoglobin A1c levels assayed by DCA 2000 with the DCCT/EDIC central laboratory assay: results of a Diabetes Research in Children Network (DirecNet) Study. Pediatr Diabetes. 2005 Mar;6(1):13-6. doi: 10.1111/j.1399-543X.2005.00088.x.

Reference Type: BACKGROUND

PMID: 15787896 (View on PubMed)

Chase HP, Beck R, Tamborlane W, Buckingham B, Mauras N, Tsalikian E, Wysocki T, Weinzimer S, Kollman C, Ruedy K, Xing D. A randomized multicenter trial comparing the GlucoWatch Biographer with standard glucose monitoring in children with type 1 diabetes. Diabetes Care. 2005 May;28(5):1101-6. doi: 10.2337/diacare.28.5.1101.

Reference Type: BACKGROUND

PMID: 15855573 (View on PubMed)

Fiallo-Scharer R; Diabetes Research in Children Network Study Group. Eight-point glucose testing versus the continuous glucose monitoring system in evaluation of glycemic control in type 1 diabetes. J Clin Endocrinol Metab. 2005 Jun;90(6):3387-91. doi: 10.1210/jc.2004-2510. Epub 2005 Mar 22.

Reference Type: BACKGROUND

PMID: 15784705 (View on PubMed)

Diabetes Research in Children Network (DirecNet) Study Group. Diabetes self-management profile for flexible insulin regimens: cross-sectional and longitudinal analysis of psychometric properties in a pediatric sample. Diabetes Care. 2005 Aug;28(8):2034-5. doi: 10.2337/diacare.28.8.2034. No abstract available.

Reference Type: BACKGROUND

PMID: 16043752 (View on PubMed)

Diabetes Research in Children Network (DirecNet) Study Group. Youth and parent satisfaction with clinical use of the GlucoWatch G2 Biographer in the management of pediatric type 1 diabetes. Diabetes Care. 2005 Aug;28(8):1929-35. doi: 10.2337/diacare.28.8.1929.

Reference Type: BACKGROUND

PMID: 16043734 (View on PubMed)

William Tamborlane, Dongyuan Xing, Michael Steffes, Craig Kollman, Katrina Ruedy, Roy Beck, Rosanna Fiallo-Scharer, Larry Fox, Darrell Wilson, Eva Tsalikian, and the Diabetes Research In Children Network (DirecNet) Study Group: Performance of the DCA2000 for Measurement of Hemoglobin A1c Levels in Children with T1DM in a DirecNet Outpatient Clinical Trial. Pediatr Res 2004; 55 (4 Pt 2):138A.

Reference Type: BACKGROUND

Michael Tansey, Roy Beck, Bruce Buckingham, Nelly Mauras, Rosanna Fiallo-Scharer, Dongyuan Xing, Craig Kollman, William Tamborlane, Katrina Ruedy, and the Diabetes Research in Children Network (DirecNet) Study Group: A Comparison of the Original vs. Modified Continuous Glucose Monitoring System (CGMS) Sensor During Using Data from Two DirecNet Studies. Diabetes 2004; 53(Suppl 2):A465.

Reference Type: BACKGROUND

Rosanna Fiallo-Scharer, Dongyuan Xing, Stuart Weinzimer, Bruce Buckingham, Nelly Mauras, Michael Tansey, Roy Beck, Katrina Ruedy, Craig Kollman, William Tamborlane, and the Diabetes Research in Children Network (DirecNet) Study Group: Utility of CGMS as a Measure of Glycemic Control in Children with Type 1 Diabetes (T1DM). Diabetes 2004; 53(Suppl 2):A67.

Reference Type: BACKGROUND

Peter Chase, Dongyuan Xing, Stuart Weinzimer, Bruce Buckingham, Nelly Mauras, Michael Tansey, Roy Beck, Katrina Ruedy, Craig Kollman, William Tamborlane, and the Diabetes Research in Children Network (DirecNet) Study Group: Comparison of 8-point Glucose Testing with Glycemic Control in Children with Type 1 Diabetes (T1DM). Diabetes 2004; 53(Suppl 2):A600.

Reference Type: BACKGROUND

Tim Wysocki, Dongyuan Xing, Rosanna Fiallo-Scharer, Elizabeth Doyle, Jennifer Block, Eva Tsalikian, Roy Beck, Katrina Ruedy, Craig Kollman, William Tamborlane, and the Diabetes Research in Children Network (DirecNet) Study Group: Diabetes Self-Management Profile-Revised for Conventional and Flexible Insulin Regimens. Diabetes 2004; 53(Suppl 2):A436.

Reference Type: BACKGROUND

H. Peter Chase, Roy Beck, William Tamborlane, Bruce Buckingham, Nelly Mauras, Eva Tsalikian, Tim Wysocki, Stuart Weinzimer, Katrina Ruedy, Dongyuan Xing, and the Diabetes Research in Children Network (DirecNet) Study Group: Lack of Effectiveness of the GlucoWatch G2 Biographer in Altering Glycemic Control in Children with Type 1 Diabetes. Diabetes Technol Ther 2005; 7(2):370.

Reference Type: BACKGROUND

Darrell Wilson, Rosanna Fiallo-Scharer, Dongyuan Xing, Tim Wyscoki, Jennifer Block, Stu Weinzimer, Craig Kollman, Roy Beck, Katrina Ruedy, William Tamborlane, and the Diabetes Research in Children Network (DirecNet) Study Group: Reliability of Two Indices of the Biologic Variability in Glycosylation among Children and Adolescents with T1DM. Diabetes 2005; 54(Suppl 1):A454.

Reference Type: BACKGROUND

Other Identifiers

HD041890

Identifier Type: -

Identifier Source: secondary_id

HD041919-01

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HD041908-01

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HD041906-01

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HD041918-01

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HD041915

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Identifier Source: secondary_id

DirecNet 004

Identifier Type: -

Identifier Source: org_study_id