- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT00818935
Low-Intermediate-Glycemic Index Caribbean Foods Versus High Glycemic Index Foods in Type 2 Diabetes
Glycemic Indices of Caribbean Foods and Application in Dietary Lifestyle Intervention for Management of Type 2 Diabetes Mellitus
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Recruitment: Subjects for the study were sourced primarily from the University Hospital of the West Indices (Diabetic Clinic) and from the Diabetes Association of Jamaica Outreach Centers in Kingston and St. Catherine. Volunteers were also recruited through clinical visits and by opportunistic population screenings and by placing advertisements in local newspapers and by distributing similar advertisements to the diabetes clinic and diabetes education programs.
Information Sessions: Approximately 112 volunteers in groups of 10-30 with or without spouses will attend one of a number of evening information sessions at run from the Department of Basic Medical Sciences (Biochemistry Section), University of the West Indies. During the sessions the exact nature of the study will be described and volunteers will have the opportunity to ask specific questions about the study.
Screening: Potential subjects will then fill in and return to the investigators a detailed questionnaire concerning their medical history, medications (including vitamin, mineral and nutritional supplements) smoking habits, alcohol intake and exercise pattern and whether they are currently on a specific diet. Details will also be obtained concerning planned vacations. Those subjects deemed potentially eligible will be asked to give a fasting blood sample at the Biotechnology Center, University of the West Indies. Individuals who meet the study criteria, are invited to return again to the Department. The principles of the diabetic diet which they are already expected to be following will be reinforced by the study nutritionist whereby consuming a diet with more than 50% of daily calories from carbohydrate; less than 10% from saturated fat and 20% from mono- and polyunsaturated fat, or up to 25% if the surplus is from monounsaturated fat; cholesterol less than 300 mg/day; and approximately 1.0 g protein per kg ideal weight per day. An increase in the intake of dietary fiber to 15 g per 1000 kcal was encouraged. All subjects were then randomized to one 24-week treatment in a two-treatment parallel design.
Treatments: 1) low glycemic index dietary advice (e.g. to eat intact grain cereals, boiled green banana, boiled sweet potato, boiled round leaf yellow yams and boiled breadfruit) 2) high cereal fiber diet. Background diets will be the subjects' diabetic diets, modified as above, which will conform. Diet histories will be recorded at weekly for 24 weeks. These diets will be assessed for consistency by the dietitian in the subject's presence through dietary recall and semi-quantitative assessment of food portion sizes consumed. Where necessary, modifications in diet will be made to ensure weight maintenance. Compliance will be assessed by 7 day food records.
Duration: the study will consist of four months recruitment and patient selection, during which time estimation of individual caloric requirements will be performed, and 6 months treatment period.
Study Details: Fasting blood samples were obtained at day zero and weeks 2, 4, 8, 12, 16 and 24 of each study period. Twenty-four hour urine for urinary C-peptide analyses will be obtained immediately prior to the beginning of the study and at the end of each 24-week treatment phase.
Palatability and satiety: subjects will record their ratings using a 9-point bipolar semantic scale at weekly intervals during each study phase.
Anthropometric measures: height at recruitment, waist and hip circumference, and body composition will be taken immediately prior to and at the end of each study phase. Body weight and blood pressure will be measured at clinic visits.
This study will help to indicate whether a low-intermediate-GI indigenous Caribbean foods dietary advice can reduce the postprandial glycemia, inflammation and cardiovascular risks in person with type 2 diabetes.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
-
-
-
Kingston, Jamaica
- University of the West Indies
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- between the age group of 25-65 years who have been previously clinically diagnosed with type 2 diabetes mellitus.
- Subjects were required to have low activity jobs, for example, clerical jobs
Exclusion Criteria:
- Individuals with Impaired glucose tolerance (IGT)
- Diabetics who were treated with insulin
- Subjects who were on hypertensive medications
- Individuals who are polycythemic or anemic
- Type 2 diabetics who participate in vigorous exercise Persons with chronic disease other than diabetes making a 3-year survival improbable as well as other medical characteristics that are likely to interfere with their participation in the study, for example, subjects with unbalanced clinical conditions, such as thyroid and liver disease, which could interfere with glucose metabolism; alcoholism or inability to effectively participate in a dietary programme
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Single
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Low-Intermediate-Glycemic Index diets
|
|
Active Comparator: High GI diet
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Glycated Haemoglobin
Time Frame: 6 months
|
6 months
|
Secondary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
body weight, homocysteine, C-reactive protein, plasma lipids and lipoproteins, fasting body glucose, insulin, insulin resistance, serum urea, creatinine, C-peptide
Time Frame: 6 months
|
6 months
|
Collaborators and Investigators
Investigators
- Principal Investigator: Prof Helen N Asemota, PhD, Univeristy of the West Indies
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- UWI-0012
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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