NCT00200239

Brief Summary

A contributing factor to the rising prevalence of obesity may be increased portion sizes. However, the effect of portion size has not been studied independent of the effect of quantity of food in the context of a behavioral weight loss program. Providing pre-portioned single servings of food may make it easier to reduce caloric and dietary fat intake improving weight loss. In addition, breakfast skipping is associated with obesity and breakfast consumption is associated with weight loss success. Therefore, the objective of the proposed study is to investigate the effect of portion size on consumption of provided breakfast foods in the context of a behavioral weight loss program. Participants will be randomized to 1 of 2 standard 12-week behavioral obesity interventions. The first intervention, serving as a control, will provide participants with breakfast foods in non-portioned containers (Standard). A second intervention will provide participants with the same type and quantity of breakfast foods but they will be provided in pre-portioned single servings (Portion). Dependent variables include the number of calories consumed from the provided foods as well as overall caloric and fat consumption. If the provision of food in pre-portioned servings is effective at decreasing intake, future directions include conducting longer interventions to improve long-term weight loss outcomes in standard behavioral interventions.

Trial Health

87
On Track

Trial Health Score

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

Enrollment
25

participants targeted

Target at below P25 for not_applicable obesity

Timeline
Completed

Started Sep 2005

Shorter than P25 for not_applicable obesity

Geographic Reach
1 country

1 active site

Status
completed

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

Trial Relationships

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Study Timeline

Key milestones and dates

Study Start

First participant enrolled

September 1, 2005

Completed
11 days until next milestone

First Submitted

Initial submission to the registry

September 12, 2005

Completed
8 days until next milestone

First Posted

Study publicly available on registry

September 20, 2005

Completed
9 months until next milestone

Primary Completion

Last participant's last visit for primary outcome

July 1, 2006

Completed
Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

July 1, 2006

Completed
Last Updated

April 20, 2012

Status Verified

December 1, 2007

Enrollment Period

10 months

First QC Date

September 12, 2005

Last Update Submit

April 19, 2012

Conditions

Outcome Measures

Primary Outcomes (1)

  • Intake of breakfast foods

    8 weeks

Secondary Outcomes (1)

  • Weight loss

    8 weeks

Study Arms (2)

1

EXPERIMENTAL

Behavioral: eating breakfast from portioned and unportioned foods

Behavioral: Eating breakfast with portion and unportioned foods

2

EXPERIMENTAL

Behavioral: eating breakfast with portioned and unportioned foods

Behavioral: Eating breakfast with portion and unportioned foods

Interventions

Behavioral: eating breakfast with portion and unportioned foods

12

Eligibility Criteria

Age21 Years - 65 Years
Sexall
Healthy VolunteersYes
Age GroupsAdult (18-64), Older Adult (65+)

You may qualify if:

  • Age between 21 and 65 years. Older adults may have more medical co-morbidities and may require greater medical supervision.
  • Body mass index (BMI) between 25 and 40 kg/m2. Based upon the Evidence Report (National Heart, Lung, and Blood Institute \[NHLBI\], 1998), weight loss is recommended for individuals with a BMI \> 25. However, individuals with a BMI of \> 40 have more medical co-morbidities and require greater medical supervision.
  • Average current consumption of breakfast on four days or fewer.

You may not qualify if:

  • Report allergies to any of the foods provided in the treatment or report lactose intolerance due to the high lactose content of some of the foods provided.
  • Report a heart condition, chest pain during periods of activity or rest, or loss of consciousness on the Physical Activity Readiness Questionnaire (PAR-Q) (Thomas, Reading, \& Shephard, 1992). Individuals endorsing joint problems, prescription medication usage, or other medical conditions that could limit exercise will be required to obtain written physician consent to participate.
  • Report major psychiatric diseases or organic brain syndromes.
  • Are currently participating in a weight loss program and/or taking weight loss medication or lost \> 5% of body weight during the past 6 months.
  • Intend to move to another city within the time frame of the investigation or will be out of town and unavailable for meetings for more than one week during the treatment program.
  • Are pregnant, lactating, less than 6 months post-partum, or plan to become pregnant during the time frame of the investigation.

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

The Weight Control and Diabetes Research Center

Providence, Rhode Island, 02903, United States

Location

MeSH Terms

Conditions

Obesity

Condition Hierarchy (Ancestors)

OverweightOvernutritionNutrition DisordersNutritional and Metabolic DiseasesBody WeightSigns and SymptomsPathological Conditions, Signs and Symptoms

Study Officials

  • Hollie A Raynor, PhD

    University of Tennessee

    PRINCIPAL INVESTIGATOR

Study Design

Study Type
interventional
Phase
not applicable
Allocation
RANDOMIZED
Masking
NONE
Purpose
TREATMENT
Intervention Model
PARALLEL
Sponsor Type
OTHER
Responsible Party
SPONSOR

Study Record Dates

First Submitted

September 12, 2005

First Posted

September 20, 2005

Study Start

September 1, 2005

Primary Completion

July 1, 2006

Study Completion

July 1, 2006

Last Updated

April 20, 2012

Record last verified: 2007-12

Locations