NCT00712127

Brief Summary

The purpose of this project is to establish a Center of Excellence in Research on Obesity that will focus on severe obesity. The prevalence of severe obesity (i.e., Class 2 and 3 obesity; body mass index \> 35 kg/m2 and 40 kg/m2) is increasing more rapidly than is overweight and Class 1 obesity. Treatment guidelines for severe obesity are uncertain. Three novel hypotheses regarding the pathogenesis of severe obesity will be tested: a) using non-invasive methods to measure energy expenditure; b) conducting an annotated lipomic search for bio-markers of impaired fat oxidation; and c) examining the role of obesity-induced inflammation as a cause for leptin resistance. Responses will also be measured following intervention with diet and activity.

Trial Health

87
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
310

participants targeted

Target at P75+ for not_applicable obesity

Timeline
Completed

Started Jun 2006

Longer than P75 for not_applicable obesity

Geographic Reach
1 country

2 active sites

Status
completed

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Start

First participant enrolled

June 1, 2006

Completed
2.1 years until next milestone

First Submitted

Initial submission to the registry

July 3, 2008

Completed
6 days until next milestone

First Posted

Study publicly available on registry

July 9, 2008

Completed
1.6 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

March 1, 2010

Completed
2 months until next milestone

Study Completion

Last participant's last visit for all outcomes

May 1, 2010

Completed
Last Updated

July 31, 2017

Status Verified

July 1, 2017

Enrollment Period

3.8 years

First QC Date

July 3, 2008

Last Update Submit

July 26, 2017

Conditions

Keywords

Body FatExerciseMetabolic syndromeObesityNutritionPhysical ActivityWeight Loss

Outcome Measures

Primary Outcomes (1)

  • This project addresses an important aspect of health disparity. The scientific inquiry as to causes of severe obesity seeks to determine if there is a differing metabolic disposition to obesity in AA compared to non-Hispanic White adults.

    Twelve months

Secondary Outcomes (1)

  • To establish treatment guidelines for obesity.

    Twelve Months

Study Arms (3)

Diet and Exercise

EXPERIMENTAL

Diet and Exercise for Class II and Class III Obesity

Other: Diet and Exercise

Diet and Exercise-Delayed

EXPERIMENTAL

Diet and Exercise-Delayed for 6 months for Class II and Class III Obesity

Other: Diet and Exercise-Delayed

Control

NO INTERVENTION

Normal weight, overweight and Class I obesity

Interventions

The participants in this intervention will receive 12 months of weight loss through diet and exercise

Diet and Exercise

Participants in this intervention will receive six months of weight loss through diet followed by six months of diet and exercise

Diet and Exercise-Delayed

Eligibility Criteria

Age30 Years - 55 Years
Sexall
Healthy VolunteersYes
Age GroupsAdult (18-64)

You may qualify if:

  • Overweight
  • Age 30 to 55
  • Able to walk 3 to 4 blocks
  • Able to attend weekly meetings

You may not qualify if:

  • Do not have diabetes
  • Have not been in a weight loss program in the last year
  • Have never had bariatric surgery or stomach bypass surgery
  • Are not taking steroids or blood thinners
  • Have no history of heart disease, heart attacks, heart surgery
  • Have not had cancer in the past 5 years
  • Are not pregnant, or haven't been in the past six months
  • Are not currently nursing or planning to become pregnant in the next year
  • Are not planning to move out of the area in the next year

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (2)

Cheyney University of Pennsylvania

Philadelphia, Pennsylvania, 19319, United States

Location

University of Pittsburgh

Pittsburgh, Pennsylvania, 15213, United States

Location

Related Publications (4)

  • Fu CP, Ali H, Rachakonda VP, Oczypok EA, DeLany JP, Kershaw EE. The ZJU index is a powerful surrogate marker for NAFLD in severely obese North American women. PLoS One. 2019 Nov 26;14(11):e0224942. doi: 10.1371/journal.pone.0224942. eCollection 2019.

  • Rachakonda V, Wills R, DeLany JP, Kershaw EE, Behari J. Differential Impact of Weight Loss on Nonalcoholic Fatty Liver Resolution in a North American Cohort with Obesity. Obesity (Silver Spring). 2017 Aug;25(8):1360-1368. doi: 10.1002/oby.21890. Epub 2017 Jun 12.

  • Hames KC, Coen PM, King WC, Anthony SJ, Stefanovic-Racic M, Toledo FG, Lowery JB, Helbling NL, Dube JJ, DeLany JP, Jakicic JM, Goodpaster BH. Resting and exercise energy metabolism in weight-reduced adults with severe obesity. Obesity (Silver Spring). 2016 Jun;24(6):1290-8. doi: 10.1002/oby.21501. Epub 2016 Apr 30.

  • Goodpaster BH, Delany JP, Otto AD, Kuller L, Vockley J, South-Paul JE, Thomas SB, Brown J, McTigue K, Hames KC, Lang W, Jakicic JM. Effects of diet and physical activity interventions on weight loss and cardiometabolic risk factors in severely obese adults: a randomized trial. JAMA. 2010 Oct 27;304(16):1795-802. doi: 10.1001/jama.2010.1505. Epub 2010 Oct 9.

MeSH Terms

Conditions

ObesityMotor ActivityMetabolic SyndromeWeight Loss

Interventions

DietExercise

Condition Hierarchy (Ancestors)

OverweightOvernutritionNutrition DisordersNutritional and Metabolic DiseasesBody WeightSigns and SymptomsPathological Conditions, Signs and SymptomsBehaviorInsulin ResistanceHyperinsulinismGlucose Metabolism DisordersMetabolic DiseasesBody Weight Changes

Intervention Hierarchy (Ancestors)

Nutritional Physiological PhenomenaDiet, Food, and NutritionPhysiological PhenomenaMotor ActivityMovementMusculoskeletal Physiological PhenomenaMusculoskeletal and Neural Physiological Phenomena

Study Officials

  • Bret H. Goodpaster, Ph.D.

    University of Pittsburgh

    PRINCIPAL INVESTIGATOR

Study Design

Study Type
interventional
Phase
not applicable
Allocation
RANDOMIZED
Masking
SINGLE
Who Masked
OUTCOMES ASSESSOR
Purpose
TREATMENT
Intervention Model
PARALLEL
Sponsor Type
OTHER
Responsible Party
PRINCIPAL INVESTIGATOR
PI Title
Professor

Study Record Dates

First Submitted

July 3, 2008

First Posted

July 9, 2008

Study Start

June 1, 2006

Primary Completion

March 1, 2010

Study Completion

May 1, 2010

Last Updated

July 31, 2017

Record last verified: 2017-07

Locations