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He Purongo Mo Nga Kai Hei Arai i Te Matehuka – Dietary Diabetes Prevention Study for Maori

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00208637
Recruitment Status : Completed
First Posted : September 21, 2005
Last Update Posted : September 21, 2005
Information provided by:
Edgar National Centre for Diabetes Research

Brief Summary:
High protein diets are popular among Maori, especially on the East Coast of the North Island. The purpose of this study was to compare the metabolic effects of a moderate carbohydrate, high protein diet (MCHP) with a high carbohydrate-high fibre (HCHF) diet on insulin sensitivity in Maori at increased risk of developing diabetes and cardiovascular disease.

Condition or disease Intervention/treatment Phase
Insulin Resistance Behavioral: moderate carbohydrate, high protein diet (MCHP) Behavioral: high carbohydrate-high fibre (HCHF) diet Not Applicable

Detailed Description:

This was a 6-month pilot intervention study of self-identifying Maori participants in a randomised control trial conducted in Dunedin and Invercargill. The study consisted of three, two month phases and was conducted over a period of six months. Participants meeting all the inclusion criteria were randomised into three groups: moderate carbohydrate-high protein (MCHP), high carbohydrate-high fibre (HCHF) or a control group. Those randomised to the experimental diets were recommended an energy intake based on their current BMI levels. The aim of phase one was to achieve weight loss with weekly advice and support from the research team. The aim of phase two was for weight maintenance with continued weekly advice and support. Phase three consisted of a weight maintenance phase without support. Those in the control group were instructed to follow their own self selected diet plan.

Outcome was determined by examining surrogate clinical endpoints. The clinical endpoints included the following recorded measurements of anthropometric measurements, bioelectrical impedance measurements, profile of mood state questionnaires, activity questionnaires, and three day diet records were collected at 0, 2, 4 and 6 month periods. Biochemical measures of lipid profile, fasting insulin and glucose, liver functions and uric acid levels were also conducted.

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Study Type : Interventional  (Clinical Trial)
Enrollment : 90 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Study Start Date : August 2002
Study Completion Date : December 2004

Primary Outcome Measures :
  1. Dietary intake as measured by 3-day weight diet records

Secondary Outcome Measures :
  1. Blood pressure
  2. Bioelectric Impedence
  3. Weight
  4. Waist circumference
  5. Total cholesterol and lipid subfractions (LDL, HDL)
  6. Fasting insulin
  7. Lipoprotein A + B
  8. Inflammatory markers
  9. Urinary albumin:creatinine ratio
  10. Quality of life
  11. All measures to be compared at end of study (6 months)

Information from the National Library of Medicine

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Ages Eligible for Study:   17 Years to 75 Years   (Child, Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Self identify as Maori aged between 17-75 years
  • Male and female
  • Non-diabetic
  • Resident of Dunedin and Invercargill
  • BMI >27
  • Family history of T2D

Exclusion Criteria:

  • The presence of diabetes, renal or liver failure, or any other medical condition which is unstable and for which potential partcipants are currently having active treatment.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00208637

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New Zealand
Edgar National Centre for Diabetes Research
Dunedin, Otago, New Zealand, 9001
Sponsors and Collaborators
Edgar National Centre for Diabetes Research
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Principal Investigator: Lorraine Brooking, BSc, MA Edgar National Centre for Diabetes Research, Dunedin, NZ
Study Director: Jim I Mann, FRACP, PhD Edgar National Centre for Diabetes Research, Dunedin, NZ

Additional Information:
Publications automatically indexed to this study by Identifier (NCT Number):
Layout table for additonal information Identifier: NCT00208637     History of Changes
Other Study ID Numbers: Kai Study
First Posted: September 21, 2005    Key Record Dates
Last Update Posted: September 21, 2005
Last Verified: September 2005
Keywords provided by Edgar National Centre for Diabetes Research:
insulin sensitivity
cardiovascular risk
diabetes prevention
diet modification
Additional relevant MeSH terms:
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Insulin Resistance
Glucose Metabolism Disorders
Metabolic Diseases