Plain English Summary
Background and study aims
Type 2 diabetes mellitus (T2DM) is a long term condition where sufferers have difficulty controlling their blood sugar (glucose) as they do not produce enough insulin to function properly (insulin deficiency), or that the body’s cells don’t react to insulin as they should do (insulin resistance). If left untreated, high blood sugar levels can lead to a range of serious complications, such as damage to the eyes, kidneys and nervous system. Effective blood sugar control is essential to prevent these complications from developing. One way of doing this is through monitoring blood sugar levels. Gyclated haemoglobin is a form of haemoglobin (the protein in red blood cells that binds to oxygen). By measuring glycated haemoglobin levels, it is possible to monitor long-term blood sugar control (around three months, which is the life cycle of a red blood cell). Research has shown that decreasing HbA1c helps to reduce risk of diabetes complications. The aim of this study is to find out if a structured blood sugar monitoring program can help improve long-term blood sugar control.
Who can participate?
Adults who have had type 2 diabetes for at least one year who are currently being treated with insulin injections.
What does the study involve?
All participants are asked to test their blood sugar levels at home at certain times of the day for three days a week for a total of six months. Participants visit the diabetes out-patient clinic at the hospital once each month, where doctors look at their blood sugar readings and determine how to change their insulin doses. At the beginning of the study and after three and six months, glycated haemoglobin is tested in order to assess whether the monitoring has helped improve overall blood sugar control.
What are the possible benefits and risks of participating?
The benefits of participating in this research may be an improvement to overall blood sugar control, however this cannot be guaranteed. Since the trial doctor may increase patient insulin doses depending on the results from their monitoring, there is a small risk that blood sugar levels may become too low. This type of side effect is usually mild and may include symptoms such as cold sweats, hunger, headache, feeling sick, changes in vision, light-headedness, feeling sleepy, nervousness, anxiety, fast heartbeat, slight shaking, weakness and difficulties concentrating. In rare cases, this may be more severe ad may lead to unconsciousness and even death. Blood testing (finger-prick and laboratory blood sampling) is part of normal diabetes care, but there might be some discomfort due to more frequent blood testing during the study.
Where is the study run from?
1. Kalafong District Hospital (South Africa)
2. Steve Biko Academic Hospital (South Africa)
When is the study starting and how long is it expected to run for?
October 2014 to October 2015
Who is funding the study?
1. Roche Diagnostics (South Africa)
2. Faculty of Health Sciences, University of Pretoria (South Africa)
3. South African National Research Foundation (South Africa)
Who is the main contact?
1. Miss Kerry Kalweit (public)
k.kalweit@live.com
2. Professor Paul Rheeder (scientific)
paul.rheeder@up.ac.za
Trial website
Contact information
Type
Public
Primary contact
Miss Kerry Kalweit
ORCID ID
http://orcid.org/0000-0002-9783-8381
Contact details
Youth With Diabetes
19 Wattle Street
Primrose East
1401
South Africa
+27832778260
k.kalweit@live.com
Type
Scientific
Additional contact
Prof Paul Rheeder
ORCID ID
Contact details
Department of Internal Medicine
Steve Biko Academic Hospital
Room 92436
School of Medicine
Faculty of Health Sciences
University of Pretoria
Bophelo Road
Gezina
Gauteng
002
South Africa
+27 72 283 7065
paul.rheeder@up.ac.za
Additional identifiers
EudraCT number
ClinicalTrials.gov number
Protocol/serial number
DOH-27-0115-4949
Study information
Scientific title
The effect of a structured self-monitoring blood glucose regimen on glycaemic control for type 2 diabetes patients using insulin
Acronym
Study hypothesis
Thea aim of this study is to assess the efficacy of structured blood glucose testing in guiding an insulin titration algorithm in poorly controlled, insulin-treated type 2 diabetes patients as per change in HbA1c over 6 months.
Ethics approval
Faculty of Health Sciences Research Ethics Committee of the University of Pretoria, 30/10/2014, ref: 432/2014
Study design
Non-randomised single-group open uncontrolled efficacy study
Primary study design
Interventional
Secondary study design
Non randomised study
Trial setting
Hospitals
Trial type
Treatment
Patient information sheet
Not available in web format, please use contact details to request a participant information sheet.
Condition
Type 2 diabetes mellitus
Intervention
Participants are asked to perform four blood glucose tests for three consecutive days of each week. On each of the self-monitoring of blood glucose (SMBG) days, a fasting breakfast and bed-time glucose test is performed. Each alternative week, the patient also performs either a fasting lunch time or fasting dinner time glucose test. For the fourth test each day, the patient alternates between one post-breakfast, and two post-lunch or two post-dinner glucose tests. SMBG testing is staggered on different days of the week throughout the month to cover weekdays and weekends. This results in a total of 48 blood glucose tests per month over a total period of six months. Participants see their diabetes physician once a month for medication adjustments based on SMBG values according to the validated insulin titration schedule.
Intervention type
Behavioural
Phase
Drug names
Primary outcome measure
Glycated hemoglobin (HbA1c) is measured using the Cobus B101 (Roche Products, South Africa) at baseline, 3 and 6 months.
Secondary outcome measures
1. Total daily insulin dose is measured by recording number of international units of insulin per day at baseline, 1, 2, 3, 4, 5 and 6 months
2. Glycaemic variability is measured using standard deviation of SMBG data at baseline, 1, 2, 3, 4, 5 and 6 months"
3. Mean fasting plasma glucose (FPG) is measured using by calculating the mean of SMBG tests performed before breakfast for each month at baseline, 1, 2, 3, 4, 5 and 6 months
4. Mean post-prandial glucose (PPG) values is measured by calculating the difference in 12 paired pre- and post-meal blood glucose values for each month at baseline, 1, 2, 3, 4, 5 and 6 months
5. Overall efficacy is measured by recording the proportion of patients reaching an HbA1c target <7.0% (53 mmol/mol) at 6 months
6. Hypoglycaemic event rate is calculated as [(total number of SMBG <4.0mmol/L across all participants) / (total duration of treatment in years across all participants)] at 6 months
7. Weight is measured using a digital scale at baseline, 1, 2, 3, 4, 5 and 6 months
8. Compliance to SMBG protocol is measured by recording the total number of SMBG tests performed out of a maximum of 288 throughout the study period at 6 months
Overall trial start date
30/10/2014
Overall trial end date
26/10/2015
Reason abandoned (if study stopped)
Eligibility
Participant inclusion criteria
1. Duration of type 2 diabetes >1 year
2. Aged 18 to 75 years
3. HbA1c ≥ 8.5% (69.4 mmol/mol)
4. Currently treated with ≥ 1 insulin injection per day
5. Voluntarily signing the informed consent document
Participant type
Patient
Age group
Adult
Gender
Both
Target number of participants
40
Participant exclusion criteria
1. Type 1 diabetes
2. Participation in any other research protocol within the last 30 days
3. Current use of oral hypoglycaemic agents other than Metformin
4. History of cancer within the last five years
5. Currently treated with chemotherapy or radiation therapy
6. Plans to relocate or travel extensively during the following six months
7. Pregnant or breast feeding
8. One or more severe hypoglycaemic episode(s) within the previous six months that resulted in hospital admission and/or coma
9. Severe depression or other severe psychological conditions
10. History of chronic kidney disease
11. History of heart failure where cardiovascular status is unstable
12. Manual or visual disability that required dependency on others to give insulin or to document blood glucose values
13. Major surgery scheduled within six months of enrolment
14. Current use of oral corticosteroids
Recruitment start date
26/01/2015
Recruitment end date
01/04/2015
Locations
Countries of recruitment
South Africa
Trial participating centre
Kalafong District Hospital
1 Klipspringer Street
Pretoria
0008
South Africa
Trial participating centre
Steve Biko Academic Hospital
Dr Savage Road
Pretoria
0002
South Africa
Sponsor information
Organisation
University of Pretoria
Sponsor details
31 Bophelo Road
Gezina
0031
South Africa
Sponsor type
University/education
Website
http://www.up.ac.za/school-of-health-systems-and-public-health
Funders
Funder type
Industry
Funder name
Roche Diagnostics
Alternative name(s)
Funding Body Type
Funding Body Subtype
Location
Funder name
Faculty of Health Sciences, University of Pretoria
Alternative name(s)
Funding Body Type
Funding Body Subtype
Location
Funder name
South African National Research Foundation
Alternative name(s)
Funding Body Type
Funding Body Subtype
Location
Results and Publications
Publication and dissemination plan
The results of this study have been submitted for consideration to the Society of Endocrinology, Metabolism and Diabetes in South Africa (SEMDSA) congress for presentation in May 2017. A journal article written on the study results has been submitted for peer review to the American Diabetes Association's journal, Diabetes Care. The authors would also like to make recommendations to the South African National Department of Health and Essential Drugs List on providing blood glucose test strips to patients with Type 2 diabetes using insulin.
IPD Sharing plan:
The datasets generated during and/or analysed during the current study are/will be available upon request from Kerry Kalweit (k.kalweit@live.com)
Intention to publish date
01/06/2017
Participant level data
Available on request
Basic results (scientific)
Publication list