Try our beta test site
IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more...

Use of the Paradigm 722 System to Improve Glycemic Control in Adult and Adolescent Subjects With Type 1 Diabetes (STAR1)

This study has been completed.
Information provided by:
Medtronic Diabetes Identifier:
First received: September 12, 2005
Last updated: April 28, 2011
Last verified: April 2011
The purpose of this study is to determine whether Type 1 Diabetic subjects using the Paradigm 722 System, which is a glucose sensor-augmented insulin pump, can improve glycemic control when compared to subjects using the Paradigm 715 insulin pump only.

Condition Intervention Phase
Type 1 Diabetes
Device: Paradigm 722 Sensor-augmented pump
Device: Paradigm 715 insulin pump
Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: Use of the Paradigm 722 System to Improve Glycemic Control in Adult and Adolescent Subjects With Type 1 Diabetes: A Multi-center, Randomized Controlled Trial

Resource links provided by NLM:

Further study details as provided by Medtronic Diabetes:

Primary Outcome Measures:
  • Change in A1c From Baseline to 26 Weeks [ Time Frame: Baseline and 26 weeks ]
    Change is defined as A1c at Week 26 minus A1c at Baseline in each study arm. The difference between the change in each group will then be analyzed. A1c measure is defined as the percent of glycated hemoglobin using one standardized assay for all subjects.

Secondary Outcome Measures:
  • Difference in Frequency of Severe Hypoglycemia From Baseline to Week 26 [ Time Frame: Baseline and 26 weeks ]
    Severe Hypoglycemia as defined by hypoglycemic events requiring the assistance of another person to actively administer carbohydrates, glucagon or other resuscitative actions, as reported by subject. The frequency evaluates the total number of events. This will be analyzed and compared between the two study arms from baseline to week 26.

  • Changes in Hypoglycemia Area Under the Curve (AUC) From Baseline to Week 26 [ Time Frame: Baseline and 26 weeks ]
    Hypoglycemia is defined as a recorded blood glucose event <70mg/dL. The amount of time spent below this parameter will be analyzed and compared between groups from Baseline to Week 26

  • Changes in Hyperglycemia Area Under the Curve (AUC) From Baseline to Week 26 [ Time Frame: Baseline and 26 weeks ]
    Hyperglycemia is defined as a recorded blood glucose event > 180 mg/dL. The amount of time spent above this parameter will be analyzed and compared between groups from Baseline to Week 26

  • Glucose Sensor Accuracy as Measured in the 722 Group [ Time Frame: Baseline and 26 weeks ]
    Percent comparative sensor glucose reading to blood glucose meter in agreement within +/- 20% (Clark Error Grid zone A + zone B).

  • Problem Areas in Diabetes (PAID) Questionnaire Assessed and Compared Between Groups [ Time Frame: Baseline and 26 weeks ]
    Questionnaire evaluating subjects'potential fear of hypoglycemia events. Change assessed at Baseline and Week 26 and compared between groups. Likert scale scored with 4 being the worst and 0 being no problem.

Enrollment: 146
Study Start Date: June 2005
Study Completion Date: February 2007
Primary Completion Date: August 2006 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Paradigm 722 sensor augmented pump Device: Paradigm 722 Sensor-augmented pump
Subjects transferred from current insulin pump to use the Paradigm 722 sensor augmented pump
Other Name: 722 pump
Active Comparator: Paradigm 715 insulin pump Device: Paradigm 715 insulin pump
Subjects transferred from their current insulin pump to use the paradigm 715 insulin pump
Other Name: 715 insulin pump

Detailed Description:

Glycemic control remains a significant challenge for both adult and adolescent Type 1 diabetics. Continuous Glucose Monitoring (CGMS) is currently used by clinicians to record continuous, retrospective glucose measurements which aid in identification of glycemic excursion patterns. This data is then used to make therapy change recommendations for the future. The Paradigm 722 System transmits real-time glucose measurements to the insulin pump every 5 minutes, allowing users to view their current glucose values, as well as to review glycemic excursions and trends over a 24-hour period. This System will alert users to high and low glucose levels, and will allow subjects and their clinicians to treat to a therapeutic target HbA1c under monitored conditions.

Subjects wearing the Paradigm 722 System will be compared to subjects wearing the Paradigm 715 Insulin Pump over a 6 month period to evaluate changes in glycemic control (HbA1c).


Ages Eligible for Study:   12 Years to 80 Years   (Child, Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Age 12 - 80 years
  • Type 1 Diabetes Mellitus diagnosed at least 1 year ago
  • Using insulin infusion pump for past 6 months minimum
  • Performing minimum 4 blood glucose tests per day
  • Agree to treat to A1c targets
  • Read and understand English

Exclusion Criteria:

  • Pregnant or planning pregnancy
  • History of unresolved tape allergy or skin conditions
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00211510

United States, California
Children's Hospital of Los Angeles
Los Angeles, California, United States, 90027
Stanford University
Stanford, California, United States, 94305
United States, Georgia
Atlanta Diabetes Associates
Atlanta, Georgia, United States, 30309
United States, Massachusetts
Joslin Diabetes Center
Boston, Massachusetts, United States, 02215
United States, New York
The Endocrine Group
Albany, New York, United States, 12206
United States, Texas
Diabetes and Glandular Diabetes Research Associates
San Antonio, Texas, United States, 78229
United States, Washington
University of Washington
Seattle, Washington, United States, 98195
Sponsors and Collaborators
Medtronic Diabetes
Study Director: Scott W Lee, MD Medtronic
  More Information

Responsible Party: Scott Lee, MD, Medtronic, Inc. Identifier: NCT00211510     History of Changes
Other Study ID Numbers: CEP 178/Z25/A2
Study First Received: September 12, 2005
Results First Received: April 1, 2011
Last Updated: April 28, 2011

Keywords provided by Medtronic Diabetes:
Continuous Glucose Monitoring
Glycemic Control

Additional relevant MeSH terms:
Diabetes Mellitus
Diabetes Mellitus, Type 1
Glucose Metabolism Disorders
Metabolic Diseases
Endocrine System Diseases
Autoimmune Diseases
Immune System Diseases
Insulin, Globin Zinc
Hypoglycemic Agents
Physiological Effects of Drugs processed this record on May 22, 2017