AzTrials
AzTrials

ObesityPhase 1NCT00160108

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

A Phase 1 study testing dietary intervention in people with Obesity and CHD, run by The S. Daniel Abraham International Center for Health and Nutrition at 1 site in Israel.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

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

Who is it for?
Ages 40 years and olderHealthy volunteers can take part
Conditions the study is for
Obesity, CHD
What is being tested?
dietary intervention
How many people
300 participants
Where
1 siteIsrael
Study dates
Jul 2005to Jul 2007
Phase
Phase 1
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 40 years and older
  • All sexes
  • Healthy volunteers accepted
  • Adult, Older adult

Who may be able to join

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

Who cannot join

  • 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).

Trial locations and contacts

1 site in 1 country.

Israel1 site

  • Medical Center, The Nuclear Research Center

    Dimona, 70700

Other trials in Israel

About this study

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

Read the detailed description

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
Being tested
dietary intervention
Medical subject headings
Obesity

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • dietary interventionBehavioural

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. weight loss

Secondary outcomes (1)

  1. CVD mediators measurements

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted12 Sep 2005 (estimated)
  2. Study startJul 2005
  3. Study completionJul 2007

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 1
Primary purpose
Prevention
Allocation
Randomised
Intervention model
Parallel groups
Masking
None (open label)
Enrolment
300 participants
IDs, dates and publications
ClinicalTrials.gov ID
NCT00160108
Sponsor's protocol ID
DR300-3
Status last verified
Sep 2006
First submitted
8 Sep 2005
Last updated
20 Mar 2018
Results posted
No

Publications

  • 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.

    PubMed 12485966

  • 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.

    PubMed 40472282

  • 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.

    PubMed 33782940

  • 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.

    PubMed 33082244

  • 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.

    PubMed 26791187

  • 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.

    PubMed 23690533

  • 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.

    PubMed 22331684

  • 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.

    PubMed 22190676

  • 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.

    PubMed 21940598

  • 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.

    PubMed 21820871

  • 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.

    PubMed 20810979

  • 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.

    PubMed 20194883

  • 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.

    PubMed 18635428

Questions about this trial

What is this clinical trial studying?

A Phase 1 study testing dietary intervention in people with Obesity and CHD, run by The S. Daniel Abraham International Center for Health and Nutrition at 1 site in Israel.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 3 inclusion and 6 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 20 Mar 2018. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Israel. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

weight loss. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT00160108, which also lists 13 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 20 Mar 2018.

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