A Dietary Intervention- Randomized Controlled Trial (DIRECT) Study; BGU-Harvard-Robarts Collaboration

NCT00160108 | Completed Phase 1

• 1 other identifier: DR300-3
• Study Type: interventional
• Target: 300
• Locations: 1 country
• Sites: 1

Brief Summary

Aim-to conduct a randomized clinical intervention study to compare three diets (low-fat, low-carbohydrate and Mediterranean diet) for weight loss

Conditions

Obesity; CHD

Outcome Measures

Primary Outcomes (1)

• weight loss

Secondary Outcomes (1)

• CVD mediators measurements

Interventions

dietary intervention BEHAVIORAL

Eligibility Criteria

• Age: 40 Years+
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• BMI\>27
• age\>40
• History of CHD or diabetes in any age or BMI level

You may not qualify if:

• Pregnant or lactating women.
• Active drug or alcohol use or dependence that, in the opinion of the site investigator, would interfere with adherence to study requirements.
• Serum creatinine \> 3 mg/dl.
• Liver dysfunction ( ³ 2 fold level of ALT and AST enzymes).
• Participation in another trial in which active intervention is being received.
• Any intestinal problem that would prevent the patient from eating one of the test diets (for example, gastric stapling that might prevent consumption of vegetables).

Sponsors & Collaborators

• The S. Daniel Abraham International Center for Health and Nutrition: lead
• Harvard School of Public Health (HSPH): collaborator
• University of Western Ontario, Canada: collaborator
• Soroka University Medical Center: collaborator
• Brigham and Women's Hospital: collaborator
• Harvard Medical School (HMS and HSDM): collaborator
• The Nuclear Research Center, Dimona: collaborator
• Ben-Gurion University of the Negev: collaborator

Study Sites (1)

Medical Center, The Nuclear Research Center

Dimona, 70700, Israel

Location

Related Publications (13)

• National Cholesterol Education Program (NCEP) Expert Panel on Detection, Evaluation, and Treatment of High Blood Cholesterol in Adults (Adult Treatment Panel III). Third Report of the National Cholesterol Education Program (NCEP) Expert Panel on Detection, Evaluation, and Treatment of High Blood Cholesterol in Adults (Adult Treatment Panel III) final report. Circulation. 2002 Dec 17;106(25):3143-421. No abstract available.

  PMID: 12485966 BACKGROUND

• Yaskolka Meir A, Tsaban G, Rinott E, Zelicha H, Schwarzfuchs D, Gepner Y, Rudich A, Shelef I, Bluher M, Stumvoll M, Ceglarek U, Isermann B, Kloting N, Keller M, Kovacs P, Qi L, Wang DD, Liang L, Hu FB, Stampfer MJ, Shai I. Individual response to lifestyle interventions: a pooled analysis of three long-term weight loss trials. Eur J Prev Cardiol. 2025 Nov 11;32(16):1660-1670. doi: 10.1093/eurjpc/zwaf308.

  PMID: 40472282 DERIVED

• Conley MM, McFarlane CM, Johnson DW, Kelly JT, Campbell KL, MacLaughlin HL. Interventions for weight loss in people with chronic kidney disease who are overweight or obese. Cochrane Database Syst Rev. 2021 Mar 30;3(3):CD013119. doi: 10.1002/14651858.CD013119.pub2.

  PMID: 33782940 DERIVED

• Yokose C, McCormick N, Rai SK, Lu N, Curhan G, Schwarzfuchs D, Shai I, Choi HK. Effects of Low-Fat, Mediterranean, or Low-Carbohydrate Weight Loss Diets on Serum Urate and Cardiometabolic Risk Factors: A Secondary Analysis of the Dietary Intervention Randomized Controlled Trial (DIRECT). Diabetes Care. 2020 Nov;43(11):2812-2820. doi: 10.2337/dc20-1002. Epub 2020 Sep 2.

  PMID: 33082244 DERIVED

• Zheng Y, Ceglarek U, Huang T, Li L, Rood J, Ryan DH, Bray GA, Sacks FM, Schwarzfuchs D, Thiery J, Shai I, Qi L. Weight-loss diets and 2-y changes in circulating amino acids in 2 randomized intervention trials. Am J Clin Nutr. 2016 Feb;103(2):505-11. doi: 10.3945/ajcn.115.117689. Epub 2016 Jan 20.

  PMID: 26791187 DERIVED

• Tirosh A, Golan R, Harman-Boehm I, Henkin Y, Schwarzfuchs D, Rudich A, Kovsan J, Fiedler GM, Bluher M, Stumvoll M, Thiery J, Stampfer MJ, Shai I. Renal function following three distinct weight loss dietary strategies during 2 years of a randomized controlled trial. Diabetes Care. 2013 Aug;36(8):2225-32. doi: 10.2337/dc12-1846. Epub 2013 May 20.

  PMID: 23690533 DERIVED

• Canfi A, Gepner Y, Schwarzfuchs D, Golan R, Shahar DR, Fraser D, Witkow S, Greenberg I, Sarusi B, Vardi H, Friger M, Stampfer MJ, Shai I. Effect of changes in the intake of weight of specific food groups on successful body weight loss during a multi-dietary strategy intervention trial. J Am Coll Nutr. 2011 Dec;30(6):491-501. doi: 10.1080/07315724.2011.10719995.

  PMID: 22331684 DERIVED

• Bluher M, Rudich A, Kloting N, Golan R, Henkin Y, Rubin E, Schwarzfuchs D, Gepner Y, Stampfer MJ, Fiedler M, Thiery J, Stumvoll M, Shai I. Two patterns of adipokine and other biomarker dynamics in a long-term weight loss intervention. Diabetes Care. 2012 Feb;35(2):342-9. doi: 10.2337/dc11-1267. Epub 2011 Dec 21.

  PMID: 22190676 DERIVED

• Leichtle AB, Helmschrodt C, Ceglarek U, Shai I, Henkin Y, Schwarzfuchs D, Golan R, Gepner Y, Stampfer MJ, Bluher M, Stumvoll M, Thiery J, Fiedler GM. Effects of a 2-y dietary weight-loss intervention on cholesterol metabolism in moderately obese men. Am J Clin Nutr. 2011 Nov;94(5):1189-95. doi: 10.3945/ajcn.111.018119. Epub 2011 Sep 21.

  PMID: 21940598 DERIVED

• Golan R, Tirosh A, Schwarzfuchs D, Harman-Boehm I, Thiery J, Fiedler GM, Bluher M, Stumvoll M, Shai I; DIRECT Group. Dietary intervention induces flow of changes within biomarkers of lipids, inflammation, liver enzymes, and glycemic control. Nutrition. 2012 Feb;28(2):131-7. doi: 10.1016/j.nut.2011.04.001. Epub 2011 Aug 6.

  PMID: 21820871 DERIVED

• Shahar DR, Schwarzfuchs D, Fraser D, Vardi H, Thiery J, Fiedler GM, Bluher M, Stumvoll M, Stampfer MJ, Shai I; DIRECT Group. Dairy calcium intake, serum vitamin D, and successful weight loss. Am J Clin Nutr. 2010 Nov;92(5):1017-22. doi: 10.3945/ajcn.2010.29355. Epub 2010 Sep 1.

  PMID: 20810979 DERIVED

• Shai I, Spence JD, Schwarzfuchs D, Henkin Y, Parraga G, Rudich A, Fenster A, Mallett C, Liel-Cohen N, Tirosh A, Bolotin A, Thiery J, Fiedler GM, Bluher M, Stumvoll M, Stampfer MJ; DIRECT Group. Dietary intervention to reverse carotid atherosclerosis. Circulation. 2010 Mar 16;121(10):1200-8. doi: 10.1161/CIRCULATIONAHA.109.879254. Epub 2010 Mar 1.

  PMID: 20194883 DERIVED

• Shai I, Schwarzfuchs D, Henkin Y, Shahar DR, Witkow S, Greenberg I, Golan R, Fraser D, Bolotin A, Vardi H, Tangi-Rozental O, Zuk-Ramot R, Sarusi B, Brickner D, Schwartz Z, Sheiner E, Marko R, Katorza E, Thiery J, Fiedler GM, Bluher M, Stumvoll M, Stampfer MJ; Dietary Intervention Randomized Controlled Trial (DIRECT) Group. Weight loss with a low-carbohydrate, Mediterranean, or low-fat diet. N Engl J Med. 2008 Jul 17;359(3):229-41. doi: 10.1056/NEJMoa0708681.

  PMID: 18635428 DERIVED

MeSH Terms

Conditions

Obesity

Interventions

Diet Therapy

Condition Hierarchy (Ancestors)

Overweight; Overnutrition; Nutrition Disorders; Nutritional and Metabolic Diseases; Body Weight; Signs and Symptoms; Pathological Conditions, Signs and Symptoms

Intervention Hierarchy (Ancestors)

Nutrition Therapy; Therapeutics

Study Officials

• Iris Shai, RD, PhD

  Ben-Gurion University of the Negev

  PRINCIPAL INVESTIGATOR

• Meir J Stampfer, MD, DrPH

  Departments of Epidemiology and Nutrition, Harvard School of Public Health, Boston, Massachusetts, USA

  STUDY CHAIR

• David Spence, MD

  Stroke Prevention & Atherosclerosis Research Centre, Robarts Research Institute, London, Canada

  STUDY CHAIR

Study Design

• Study Type: interventional
• Phase: phase 1
• Allocation: RANDOMIZED
• Masking: NONE
• Purpose: PREVENTION
• Intervention Model: PARALLEL
• Sponsor Type: OTHER

Study Record Dates

• First Submitted: September 8, 2005
• First Posted: September 12, 2005
• Study Start: July 1, 2005
• Study Completion: July 1, 2007
• Last Updated: March 20, 2018

Record last verified: 2006-09

Locations

IL (1)