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Glucose Control Using Continuous Glucose Monitoring in People With Type 2 Diabetes Who Have Had Acute Myocardial Infarct (GLAM)

Primary Purpose

Type 2 Diabetes, Acute Myocardial Infarction, Acute Myocardial Infarction With ST Elevation

Status
Recruiting
Phase
Not Applicable
Locations
United Kingdom
Study Type
Interventional
Intervention
Dexcom ONE Continuous Glucose Monitoring System
Sponsored by
Imperial College London
About
Eligibility
Locations
Arms
Outcomes
Full info

About this trial

This is an interventional treatment trial for Type 2 Diabetes

Eligibility Criteria

18 Years - undefined (Adult, Older Adult)All SexesDoes not accept healthy volunteers

Inclusion Criteria:

From the Hammersmith Hospital In-patient Cardiology Services:

  • Adults aged >18 years
  • Known type 2 diabetes
  • Taking one or more oral hypoglycaemic agent, GLP1 receptor analogue and/or insulin
  • HbA1c >58mmol/mol
  • Admitted to the HAC with ACS
  • Raised blood troponin level on admission

From Imperial College Healthcare Trust Diabetes and Cardiology Clinics:

Adults aged >18 years

  • Known type 2 diabetes
  • Previous acute coronary syndrome within the last 10 years but > 6 months ago
  • Taking one or more oral hypoglycaemic agent and /or GLP1 receptor analogue, and/or insulin
  • HbA1c >58mmol/mol

Exclusion Criteria:

From the Hammersmith Hospital In-patient Cardiology Services:

  • Acute coronary syndrome within the last 6 months
  • People who have previously had bariatric surgery
  • People taking hydroxyurea
  • People who undergo haemodialysis or peritoneal dialysis
  • Unable to participate due to other factors, as assessed by the Chief Investigators
  • Pregnancy as determined by clinical team
  • Known to have a terminal condition or conditions that suggest a life expectancy less than 1 year

From Imperial College Healthcare Trust Diabetes and Cardiology Clinics:

  • People who have previously had bariatric surgery
  • People taking hydroxyurea
  • People who undergo haemodialysis or peritoneal dialysis
  • Unable to participate due to other factors, as assessed by the Chief Investigators
  • Pregnancy as determined by clinical team
  • Known to have a terminal condition or conditions that suggest a life expectancy less than 1 year
  • Previous acute coronary syndrome more than 10 years ago or within the last 6 months

Sites / Locations

  • Hammersmith Hospital inpatient cardiology servicesRecruiting

Arms of the Study

Arm 1

Arm 2

Arm 3

Arm 4

Arm Type

Experimental

No Intervention

No Intervention

No Intervention

Arm Label

Real time CGM post acute myocardial infarct

Blinded CGM post acute myocardial infarct

Blinded CGM historical acute myocardial infarct (>6 months and <10 years ago)

Cardiovascular outcomes control group

Arm Description

Real time Dexcom ONE CGM system to be applied for 26 weeks post acute myocardial infarct.

Blinded Dexcom ONE CGM system to be applied for 10 days at recruitment, and then at days 17-23, week 10 and week 24. This will be for the purposes of monitoring glucose only and is not an intervention and is blinded to the participants and the study investigators. CGM measurements will be blinded until the end of the study. Management of diabetes in this cohort as per usual standards of care.

Blinded Dexcom ONE CGM system to be applied for 10 days at recruitment. This will be for the purposes of monitoring glucose only and is not an intervention and is blinded to the participants and the study investigators. Management of diabetes in this cohort as per usual standards of care.

Age and sex-matched controls from the NIHR Cardiovascular Health Informatics Collaborative.

Outcomes

Primary Outcome Measures

Primary outcome: Percent time spent in glucose target range (3.9-10mmol/L)
Percent time spent in glucose target range (3.9-10mmol/L)

Secondary Outcome Measures

Number hypoglycaemic excursions.
Number of detected excursions on CGM to glucose <3.9mmol/L
Time spent in hypoglycaemia (<3.9mmol/L, 70mg/dL; <3.0mmol/L, 54mg/dL),
Time spent with glucose <3.9mmol/L, time spent with glucose <3mmol/L
Time in euglycaemia (3.9-7.8mmol/L, 70-140mg/dL).
Secondary outcome
Time in hyperglycaemia (>10mmol/L, 180mg/dL).
Secondary outcome
Hypoglycaemia requiring 3rd party assistance.
Number of hypoglycaemia events requiring assistance of 3rd party
Number hypoglycaemic excursions (sensor glucose <3.0mmol/l for >= 20min)
Secondary outcome
HbA1c at 12 weeks and 26 weeks.
Glycosylated haemoglobin (HbA1c) in percent or mmol/mol
Glucose variability assessed by %Coefficient of Variation (%CV).
Variability of glucose (oscillations in glucose values)
Mean Absolute Glucose (MAG)
mean absolute Mean absolute glucose change per unit time
Health and treatment-related quality of life measured by the Diabetes Treatment Satisfaction Scale score.
The DTSQ s (status version) and DTSQ c (change version) contain eight items each, six of them (questions 1 and 4-8) measure the Treatment Satisfaction and questions 2 and 3, concerning Perceived Frequency of Hyperglycaemia ('Perceived Hyperglycaemia')/Perceived Frequency of Hypoglycaemia ('Perceived Hypoglycaemia') respectively, are treated separately from the satisfaction items and from each other. DTSQs scores range from 6 = very satisfied to 0 = very dissatisfied and DTSQc scores from +3 = much more satisfied now to -3 = much less satisfied now, with 0 (midpoint), representing no change.
Hypoglycaemic symptoms
The HypoSRQ is designed to measure the experience of common symptoms associated with hypoglycaemia in people with diabetes. This questionnaire has 18 questions- which require a yes/no response. If the answer is yes, the participant then grades the symptom against 4 categories of severity
Low Blood Glucose Index (LBGI})
Secondary Outcome
Audit of Diabetes Dependent Quality of Life questionnaire domain.
The Audit of Diabetes Dependent Quality of Life -19 questionnaire is a 19 item measure that looks at the impact of diabetes on specific aspects of life and the importance of these aspects for QoL.

Full Information

First Posted
June 13, 2022
Last Updated
September 29, 2023
Sponsor
Imperial College London
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1. Study Identification

Unique Protocol Identification Number
NCT05431296
Brief Title
Glucose Control Using Continuous Glucose Monitoring in People With Type 2 Diabetes Who Have Had Acute Myocardial Infarct
Acronym
GLAM
Official Title
Glucose Monitoring After Acute Myocardial Infarct in People With Diabetes
Study Type
Interventional

2. Study Status

Record Verification Date
September 2023
Overall Recruitment Status
Recruiting
Study Start Date
February 7, 2023 (Actual)
Primary Completion Date
August 2024 (Anticipated)
Study Completion Date
February 2025 (Anticipated)

3. Sponsor/Collaborators

Responsible Party, by Official Title
Sponsor
Name of the Sponsor
Imperial College London

4. Oversight

Studies a U.S. FDA-regulated Drug Product
No
Studies a U.S. FDA-regulated Device Product
Yes
Product Manufactured in and Exported from the U.S.
Yes
Data Monitoring Committee
No

5. Study Description

Brief Summary
Glucose monitoring after Acute Myocardial infarct in people with diabetes is a Dexcom funded study that is investigating whether the use of continuous glucose monitors (Dexcom ONE model) in people with type 2 diabetes facilitates time in glycaemic range in the 6 months after an acute myocardial infarction. As an exploratory outcome it will investigate whether time in glycaemic range is associated with changes in mortality and major adverse cardiac events in the 6 months after acute myocardial infarct.
Detailed Description
The study Patients recruited from cardiology services after ACS (n=140 participants) Following informed consent study participants with known diabetes who have had an acute myocardial infarct will be recruited. Participants will be randomly allocated to either the intervention group, referred to as cohort 'a', or to the control group, referred to cohort 'b'. They will be randomised using permuted blocks in a 5:2 ratio (intervention:control). CGM (real-time or blinded) will be applied to participants prior to discharge. Following hospital discharge, we will evaluate the effects of changes in blood glucose levels on cardiac and health outcomes. Participants recruited to cohort 'a' will wear real-time CGM continuously after hospital discharge for 26 weeks. They will have face-to-face, telephone or video reviews of CGM data at 4 and 12 weeks with clinician-led diabetes treatment escalation according to NICE guidelines based aiming for >70% time in target blood glucose range, 3.9-10mmol/L (50% for older or high risk individuals). Participants recruited to cohort 'b' will wear blinded CGM for 10 days after insertion. They will wear blinded CGM again for 10 days , with the second sensor insertion at days 17-23, third sensor insertion during week 10 and fourth sensor insertion during week 24. Following each sensor wear, participants in cohort 'b' will have a study visit when their sensor data will be downloaded. Participants in cohort 'b' will receive face-to-face or remote support to insert and establish blinded CGM but no clinical review and the participant should manage their diabetes as the participant normally would. At 26 weeks data will be analysed for all primary and secondary outcomes. The participants who receive real-time CGM will be compared to age and sex-matched controls, who's data will be obtained from the NIHR Cardiovascular Health Informatics Collaborative for comparison of cardiovascular outcomes. At 26 weeks data (clinical details of hospital admissions, further cardiac events, medication changes, blood test results obtained from hospital records and on discussion with the participant) will be collected for all primary and secondary outcomes. Imperial College Healthcare NHS Trust uses an electronic patient record system that is connected to the central NHS Spine and is updated in real-time. People who have died, even if the person has died out of hospital, will be recorded as deceased and this will be visible to the research team. End of study will be defined as Last Subject Last Visit (LSLV) at which point the participant will be asked to return or post back their study equipment and the participant will revert to standard care with their usual GP, community or hospital diabetes team. Eligible participants admitted to the Hammersmith Hospital HAC with confirmed ACS will be recruited as soon as possible after hospital admission. Patients lacking capacity to consent will not be recruited. During admission, HbA1c levels will be sent as part of routine blood testing. The research team will collect full medical and medication history, as well as historic bloods test results from the hospital computer systems as per routine clinical care. All participants recruited during their hospital admission will have blood tests (for HbA1c and other markers of metabolism) during admission and at 4, 12 and 24-26 weeks. Participants in cohorts 'a' and 'b' will be asked to complete the Diabetes Treatment Satisfaction Scale questionnaire, the Audit of Diabetes Dependent Quality of Life questionnaire and the Hypoglycaemia Symptom Rating Questionnaire at the time of recruitment, and then at 4, 12, and 24 weeks. Participants will also be asked to fill out an Audit of Diabetes Dependent Quality of Life-19 questionnaire at the time of recruitment and at 12 and 24 weeks. Patients recruited from diabetes and cardiology clinics after ACS (n=20 participants) Eligible participants reviewed in clinic with confirmed previous ACS will be recruited. Patients lacking capacity to consent will not be recruited. HbA1c levels will be sent as part of routine blood testing. The research team will collect full medical and medication history, as well as historic bloods test results from the hospital computer systems as per routine clinical care. Blinded CGM will be applied to 20 participants with a history of ACS more than 6 months ago, but less than 10 years ago and a known diagnosis of type 2 diabetes who take one or oral diabetic agents, and/or GLP 1 receptor analogue, and/or insulin. The blinded CGM will be worn for 10 days and then returned to (or collected by) the study team. These participants be asked to complete a Diabetes Treatment Satisfaction Scale questionnaire, the Audit of Diabetes Dependent Quality of Life questionnaire and the Hypoglycaemia Symptom Rating Questionnaire at the time of recruitment. The participants will have a blood test looking at glycaemic control and markers of metabolism at the time of recruitment. Data collection from the Health Information Collaborative The participants who receive real-time CGM will be compared to age and sex-matched controls, who's data will be obtained from the NIHR Cardiovascular Health Informatics Collaborative for comparison of cardiovascular outcomes. Imperial College Healthcare NHS Trust has led the NIHR Cardiovascular Health Informatics Collaborative, which was established to enable the sharing and repurposing of routinely captured clinical data for re-use in research. Clinical patient data is extracted and put into a tabular format which includes demographics, emergency department attendance, inpatient episodes, blood tests, diagnoses, operations and procedures, echocardiography measurements and survival status. This infrastructure has been used to investigate patient outcomes in previous studies and will provide endpoint data for the patients enrolled into this study. 2. Clinical study recruitment: Single Centre- Imperial College Healthcare NHS Trust Design: Randomised control trial Population: Interventional cohort: 100 participants with type 2 diabetes and acute myocardial infarction will wear real time CGM for 26 weeks Control: 40 participants with type 2 diabetes and acute myocardial infarction will wear blinded CGM for 10 days at 4 time points in the 6 months after infarct. Clinic cohort: 20 participants with type 2 diabetes who have had a myocardial infarct > 6 months ago but <10 years ago will wear blinded CGM for 10 days. Case control: NIHR Cardiovascular Health Informatics Collaborative dataset Timescale: Each participant will be in the trial for 6 months. It is anticipated that it will take 18-24 months to recruit to target study number. 3. Statistics The study is powered to detect a change of between 7.2 and 13.2% difference in time in range glucose 3.9-10mmol/l between the real time and blinded CGM groups at 6 months depending the standard deviation used in the power calculation with two tailed alpha of 0.05 and power of 80%. This difference is thought to be a clinically meaningful and achievable difference. For each questionnaire, mean ± SD values or percentiles appropriate to the distribution will be given by randomization group for the total score and each subscale. Treatment group comparisons will be made using linear models. The following tabulations will be performed according to treatment group without statistical testing: baseline demographics and clinical characteristics, protocol deviations, device malfunctions and other reported device issue. For all CGM outcomes, a multilevel model of repeated measures (MMRM) will be used. 4. Data During the course of the study visits some data will be stored on laptop computers, not connected to the Internet, for later statistical analysis. These data will be coded and non- identifiable. Laptop computers may be used during the visits for portability and convenience. At the end of each visit the anonymised data will be transferred immediately to a secure web-server (details below) and will be deleted from the laptop. Any identifiable participant data will be stored in a locked filing cabinet in a secure room in each investigation centre. Only clinical research team will have access to this participant identifiable data. 5. Adverse Events (AEs) Reporting Procedures. All adverse events will be reported. Depending on the nature of the event the reporting procedures below will be followed. Any questions concerning adverse event reporting will be directed to the Chief Investigator in the first instance. Non serious AEs: All such events will be recorded. Serious Adverse Events (SAEs): An SAE form will be completed and faxed to the Chief Investigator within 24 hours. However, hospitalisations for elective treatment of a pre-existing condition do not need reporting as SAEs. Reports of related and unexpected SAEs will be submitted within 15 days of the Chief Investigator becoming aware of the event. The Chief Investigator will also notify the Sponsor of all SAEs, where in the opinion of the Chief Investigator, the event is: 'related', i.e. resulted from the administration of any of the research procedures; and 'unexpected', i.e. an event that is not listed in the protocol as an expected occurrence Local investigators will report any SAEs as required by their Local Research Ethics Committee, Sponsor and/or Research & Development Office.

6. Conditions and Keywords

Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Type 2 Diabetes, Acute Myocardial Infarction, Acute Myocardial Infarction With ST Elevation, Diabetes Complications

7. Study Design

Primary Purpose
Treatment
Study Phase
Not Applicable
Interventional Study Model
Single Group Assignment
Model Description
Randomised control trial
Masking
None (Open Label)
Allocation
Randomized
Enrollment
160 (Anticipated)

8. Arms, Groups, and Interventions

Arm Title
Real time CGM post acute myocardial infarct
Arm Type
Experimental
Arm Description
Real time Dexcom ONE CGM system to be applied for 26 weeks post acute myocardial infarct.
Arm Title
Blinded CGM post acute myocardial infarct
Arm Type
No Intervention
Arm Description
Blinded Dexcom ONE CGM system to be applied for 10 days at recruitment, and then at days 17-23, week 10 and week 24. This will be for the purposes of monitoring glucose only and is not an intervention and is blinded to the participants and the study investigators. CGM measurements will be blinded until the end of the study. Management of diabetes in this cohort as per usual standards of care.
Arm Title
Blinded CGM historical acute myocardial infarct (>6 months and <10 years ago)
Arm Type
No Intervention
Arm Description
Blinded Dexcom ONE CGM system to be applied for 10 days at recruitment. This will be for the purposes of monitoring glucose only and is not an intervention and is blinded to the participants and the study investigators. Management of diabetes in this cohort as per usual standards of care.
Arm Title
Cardiovascular outcomes control group
Arm Type
No Intervention
Arm Description
Age and sex-matched controls from the NIHR Cardiovascular Health Informatics Collaborative.
Intervention Type
Device
Intervention Name(s)
Dexcom ONE Continuous Glucose Monitoring System
Intervention Description
The Dexcom ONE is comprised of a sensor, transmitter and display device (receiver and/or compatible smart device). The system features a redesigned, one-touch auto-applicator and sleek, discreet transmitter. CGM involves insertion of a small plastic cannula to the subcutaneous tissue of the abdominal skin by members of the study team. The cannula is attached to a small data. The cannula is attached to a small transmitter which is taped to the skin and sends data about interstitial glucose via Bluetooth to a receiver which displays a blood glucose reading. The Dexcom G6 sends glucose readings to a compatible smart device or the Dexcom receiver every 5 minutes.
Primary Outcome Measure Information:
Title
Primary outcome: Percent time spent in glucose target range (3.9-10mmol/L)
Description
Percent time spent in glucose target range (3.9-10mmol/L)
Time Frame
26 weeks
Secondary Outcome Measure Information:
Title
Number hypoglycaemic excursions.
Description
Number of detected excursions on CGM to glucose <3.9mmol/L
Time Frame
26 weeks
Title
Time spent in hypoglycaemia (<3.9mmol/L, 70mg/dL; <3.0mmol/L, 54mg/dL),
Description
Time spent with glucose <3.9mmol/L, time spent with glucose <3mmol/L
Time Frame
26 weeks
Title
Time in euglycaemia (3.9-7.8mmol/L, 70-140mg/dL).
Description
Secondary outcome
Time Frame
26 weeks
Title
Time in hyperglycaemia (>10mmol/L, 180mg/dL).
Description
Secondary outcome
Time Frame
26 weeks
Title
Hypoglycaemia requiring 3rd party assistance.
Description
Number of hypoglycaemia events requiring assistance of 3rd party
Time Frame
26 weeks
Title
Number hypoglycaemic excursions (sensor glucose <3.0mmol/l for >= 20min)
Description
Secondary outcome
Time Frame
26 weeks
Title
HbA1c at 12 weeks and 26 weeks.
Description
Glycosylated haemoglobin (HbA1c) in percent or mmol/mol
Time Frame
26 weeks
Title
Glucose variability assessed by %Coefficient of Variation (%CV).
Description
Variability of glucose (oscillations in glucose values)
Time Frame
26 weeks
Title
Mean Absolute Glucose (MAG)
Description
mean absolute Mean absolute glucose change per unit time
Time Frame
26 weeks
Title
Health and treatment-related quality of life measured by the Diabetes Treatment Satisfaction Scale score.
Description
The DTSQ s (status version) and DTSQ c (change version) contain eight items each, six of them (questions 1 and 4-8) measure the Treatment Satisfaction and questions 2 and 3, concerning Perceived Frequency of Hyperglycaemia ('Perceived Hyperglycaemia')/Perceived Frequency of Hypoglycaemia ('Perceived Hypoglycaemia') respectively, are treated separately from the satisfaction items and from each other. DTSQs scores range from 6 = very satisfied to 0 = very dissatisfied and DTSQc scores from +3 = much more satisfied now to -3 = much less satisfied now, with 0 (midpoint), representing no change.
Time Frame
26 weeks
Title
Hypoglycaemic symptoms
Description
The HypoSRQ is designed to measure the experience of common symptoms associated with hypoglycaemia in people with diabetes. This questionnaire has 18 questions- which require a yes/no response. If the answer is yes, the participant then grades the symptom against 4 categories of severity
Time Frame
26 weeks.
Title
Low Blood Glucose Index (LBGI})
Description
Secondary Outcome
Time Frame
26 weeks.
Title
Audit of Diabetes Dependent Quality of Life questionnaire domain.
Description
The Audit of Diabetes Dependent Quality of Life -19 questionnaire is a 19 item measure that looks at the impact of diabetes on specific aspects of life and the importance of these aspects for QoL.
Time Frame
26 weeks.
Other Pre-specified Outcome Measures:
Title
MACE endpoint defined as death due to cardiac cause or hospitalisation with acute coronary syndrome (including MI and unstable angina); heart failure; unscheduled revascularisation; arrhythmia; cerebrovascular event
Description
Exploratory outcome
Time Frame
26 weeks
Title
All cause mortality
Description
Exploratory outcome
Time Frame
26 weeks
Title
Duration of hospital admission before 'medically fit for discharge'.
Description
Exploratory outcome
Time Frame
26 weeks
Title
Escalation to High Dependency Unit or Intensive Care Unit during primary hospital episode.
Description
Exploratory outcome
Time Frame
26 weeks
Title
Echocardiographic measurements of cardiac function.
Description
Ejection fraction as a percentage
Time Frame
26 weeks
Title
Changes in care, measured by changes in diabetes medication usage.
Description
Exploratory outcome
Time Frame
26 weeks

10. Eligibility

Sex
All
Minimum Age & Unit of Time
18 Years
Accepts Healthy Volunteers
No
Eligibility Criteria
Inclusion Criteria: From the Hammersmith Hospital In-patient Cardiology Services: Adults aged >18 years Known or newly diagnosed type 2 diabetes Taking one or more oral hypoglycaemic agent, GLP1 receptor analogue and/or insulin Admitted to Hammersmith Hospital cardiology inpatient services with ACS Raised blood troponin level on admission From Imperial College Healthcare Trust Diabetes and Cardiology Clinics: Adults aged >18 years Known type 2 diabetes Previous acute coronary syndrome within the last 10 years but > 6 months ago Taking one or more oral hypoglycaemic agent and /or GLP1 receptor analogue, and/or insulin Exclusion Criteria: From the Hammersmith Hospital In-patient Cardiology Services: HbA1c <48mmol/mol People who have previously had bariatric surgery People taking hydroxyurea People who undergo haemodialysis or peritoneal dialysis Unable to participate due to other factors, as assessed by the Chief Investigators Pregnancy as determined by clinical team Known to have a terminal condition or conditions that suggest a life expectancy less than 1 year From Imperial College Healthcare Trust Diabetes and Cardiology Clinics: HbA1c <48mmol/mol People who have previously had bariatric surgery People taking hydroxyurea People who undergo haemodialysis or peritoneal dialysis Unable to participate due to other factors, as assessed by the Chief Investigators Pregnancy as determined by clinical team Known to have a terminal condition or conditions that suggest a life expectancy less than 1 year Previous acute coronary syndrome more than 10 years ago or within the last 6 months
Central Contact Person:
First Name & Middle Initial & Last Name or Official Title & Degree
Neil Hill, BMBS, PhD
Phone
02033111016
Email
neil.hill@nhs.net
First Name & Middle Initial & Last Name or Official Title & Degree
Nick Oliver, MB BS, BSc
Email
nick.oliver@imperial.ac.uk
Overall Study Officials:
First Name & Middle Initial & Last Name & Degree
Neil Hill, BMBS, PhD
Organizational Affiliation
Imperial College London
Official's Role
Principal Investigator
First Name & Middle Initial & Last Name & Degree
Jamil Mayet, MBChB, MD
Organizational Affiliation
Imperial College London
Official's Role
Principal Investigator
Facility Information:
Facility Name
Hammersmith Hospital inpatient cardiology services
City
London
Country
United Kingdom
Individual Site Status
Recruiting
Facility Contact:
First Name & Middle Initial & Last Name & Degree
Harriet Esdaile
Email
h.esdaile@imperial.ac.uk

12. IPD Sharing Statement

Plan to Share IPD
No
Citations:
PubMed Identifier
9217897
Citation
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Glucose Control Using Continuous Glucose Monitoring in People With Type 2 Diabetes Who Have Had Acute Myocardial Infarct

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