Type1 Diabetes Mellitus Clinical Trial
Official title:
Comparison of Real-time CGMS With Intermittently-scanned CGMS in Adolescents and Adults With Type 1 Diabetes Mellitus: an Open Label Randomised Control Cross Over Study
Type 1 Diabetes Mellitus (T1DM) is characterized by absolute insulin deficiency. Despite multiple daily insulin injections, glycemic targets are usually not achieved in T1DM patients.Use of continuos glucose monitoring system (CGMS) is associated with improvement in glycemic control and reduction in glycemic variability in T1DM subjects. real-time CGMS (rt-CGMS) and intermittently scanned CGMS (is-CGMS) are the newer CGMS technologies. Previous studies have shown that in T1DM patients rt-CGMS is better than is-CGMS for glycemic control and reducing hypoglycemic episodes in patients with impaired awareness of hypoglycemia, but in patients with normal hypoglycemic awareness this is not well established. This study is a randomized control clinical cross over study of 6 months duration in patients of T1DM having normal hypoglycemic awareness, with age 15-40 years with a HbA1c range of 8-12%. Following a training period of 2 weeks, 80 participants will be randomized into 3 arms in a ratio of 1:1:2 in rt-CGMS, is-CGMS and SMBG (self monitoring of blood glucose) arms, respectively. For the first two groups Medtronic Guardian Connect Sensor 3 and Abott Freestyle Libre Sensor 2will be applied for 2 weeks, respectively; followed by a crossover at 3 months withapplication of is-CGMS and rt-CGMS, respectively in these groups for a further 2 weeks period. For rest of the study duration these patients in the rt-CGMS and is-CGMS group will be monitored through SMBG. The 3rd SMBG group will act as control. Short term blood glucose control will be assessed by Fructosamine assay in the 2 CGMS groups and long term control by HbA1C.
Status | Recruiting |
Enrollment | 80 |
Est. completion date | March 2024 |
Est. primary completion date | March 2024 |
Accepts healthy volunteers | No |
Gender | All |
Age group | 15 Years to 40 Years |
Eligibility | Inclusion Criteria: 1. Adolescents and adults aged 15-40 years with Type-1 Diabetes mellitus defined by any of the following; i. Diabetic Ketoacidosis or ketonemia or ketonuria at diagnosis with insulin dependence for survival since diagnosis OR ii. Insulin dependence for survival since diagnosis and any one of the following autoantibody positivity: GAD-65 or IA-2 2. Patients on Basal bolus regimen (Glargine as basal and lispro /Aspart /Glulisine as bolus); 3. Duration of Diabetes > 2 years; 4. Insulin dose requirement of at least 0.5U/kg 5. HbA1c 8%-12%; 6. Gold score<4; 7. No previous experience with rt-CGMS and/or is-CGMS; 8. Euthyroid status; 9. If hypothyroid, then on stable dose of Levothyroxine for last 3 months with normal T4 level; 10. Urine albumin creatinine ratio<300 mg/g of Creatinine; 11. Those willing to give informed consent prior to enrolment. Exclusion Criteria: 1. LADA or Secondary Diabetes 2. eGFR<60ml/min/1.73m2 3. Celiac disease; 4. Hb<12g/dl for males and <11g/dl for females; 5. Hypoglycemia unawareness defined by Gold score=4; 6. HbA1c>12%; 7. Diabetic Ketoacidosis in the previous 3 months; 8. Severe Non proliferative Diabetic retinopathy/Proliferative Diabetic Retinopathy/Macular edema; 9. Pregnancy; 10. Lactation; 11. Willing to become pregnant during study; 12. Requiring MRI for any existing condition; 13. Any other chronic illness. |
Country | Name | City | State |
---|---|---|---|
India | Post Graduate Institute of Medical Education and Research | Chandigarh |
Lead Sponsor | Collaborator |
---|---|
Postgraduate Institute of Medical Education and Research |
India,
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | HbA1c | Composite outcome of blood glucose control over the preceding 3 months at time=3 months from the start of the study, It will be measured in % using VARIANTII TURBO Hemoglobin Testing System- Bio Rad. | 3 months | |
Secondary | HbA1c | Composite outcome of blood glucose control over the preceding 3 months at time=6months from the start of the study.It will be measured in % using VARIANTII TURBO Hemoglobin Testing System- Bio Rad. | 6 months | |
Secondary | Fructosamine levels in the CGMS groups | - before the application of Ist device and immediately after the end of 2 weeks at the beginning of the study and at the time of crossover(3 months from the start of the study)immediately before and after 2 weeks of application of 2nd device. This will be done only in rt-CGMS and is-CGMS arms.It will be measured in micromole per litre using Roche cobas FRA colorimetric system in the plasma with a measuring range between 14-1000 micromole per litre. | At baseline , 2 weeks, 3 months and 3 months 2 weeks. | |
Secondary | Mean sensor glucose | Assessment of mean glucose in mg/dl will be done from the CGMS i.e. from the Medtronic Guardian Connect Sensor 3 in the real-time CGMS group and from the Abott Free Style Libre Sensor intermittently-scanned CGMS group. | After the first device(2 weeks) and after 2nd device(3 months 2 weeks) | |
Secondary | Standard deviation of Sensor Glucose | It is a measure of deviation of blood glucose values from the mean which will be obtained from blood glucose readings from the CGMS i.e. from the Medtronic Guardian Connect Sensor 3 in the real-time CGMS group and from the Abott Free Style Libre Sensor intermittently-scanned CGMS group. It will be measured in mg/dl in both the real time-CGMS and intermittently scanned CGMS groups. | After the first device(2 weeks) and after 2nd device(3 months 2 weeks) | |
Secondary | Coefficient of Variation(CV) | It is a measure of blood glucose variability over a period of time derived from the Mean blood glucose and Standard Deviation of blood glucose obtained from the CGMS, it will be measured as percentage from the CGM sensor i.e. from the Medtronic Guardian Connect Sensor 3 in the real-time CGMS group and from the Abott Free Style Libre Sensor intermittently-scanned CGMS group.Higher the coefficient of variation more is the risk for microvascular complications of diabetes.Stable blood glucose should have Coefficient of Variation <36%. | After the first device(2 weeks) and after 2nd device(3 months 2 weeks) | |
Secondary | Median Amplitude of Glycemic Excursions(MAGE) | It is the arithmetic mean of the amplitude of the blood glucose excursions that are greater than the Standard Deviation of the glucose values. It is calculated from the blood glucose values provided from the CGMS i.e. from the Medtronic Guardian Connect Sensor 3 in the real-time CGMS group and from the Abott Free Style Libre Sensor intermittently-scanned CGMS group.It is measured in millimoles per litre and will be calculated in both real-time CGMS and intermittently scanned CGMS groups using Easy GV software. | After the first device(2 weeks) and after 2nd device(3 months 2 weeks) | |
Secondary | Quality of Life | This will be assessed in all the 3 groups using Quality of Life Instrument for Indian Diabetes Patients(QOLID) questionnaire. It consists of 34 items covering eight domains with scores as below. It uses a standard Likert scale across all questions.Minimum possible overall score is 34 and maximum possible overallscore is 175.Details as follows- role limitation due to physical health (6 - 30); physical endurance (6 - 30); general health (3 - 15); treatment satisfaction (4 - 20); symptom frequency ( 3 - 15); financial worries ( 4 - 20); mental health ( 5 - 25) and diet advice satisfaction( 3 - 15). Higher the score better the quality of life in that domain. | At Baseline and 3 months. |
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