NCT02099812

Brief Summary

Low socioeconomic status (low SES), as defined by educational attainment and income, has been associated with obesity in industrialized nations. Low SES has been related to impulsive decision-making characterized by steep devaluation of future outcomes (delay discounting, DD) and a greater motivation to obtain food (food reinforcement, FR). DD and FR have been shown to interactively predict ad libitum energy intake in laboratory studies, such that participants exhibiting high FR as well as high DD consume the most food. Obesity often results from energy intake in excess of physiologic needs, and thus a plausible mechanism is that low SES environments increase FR and DD, leading to overeating and obesity. The primary aims of this study are to determine whether FR and DD interact to predict BMI, and whether differences in FR and DD mediate the relationship between low SES and obesity, in a large sample of US adults of varying BMI. In addition, whether high FR and high DD are related to unhealthy food purchasing and eating behaviors will be assessed. It is anticipated that high FR and DD will be related to unhealthy food purchasing and eating behaviors.

Trial Health

100
On Track

Trial Health Score

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

Enrollment
1,585

participants targeted

Target at P75+ for all trials

Timeline
Completed

Started Dec 2012

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

December 1, 2012

Completed
6 months until next milestone

Primary Completion

Last participant's last visit for primary outcome

June 1, 2013

Completed
9 months until next milestone

First Submitted

Initial submission to the registry

March 10, 2014

Completed
21 days until next milestone

First Posted

Study publicly available on registry

March 31, 2014

Completed
5 months until next milestone

Study Completion

Last participant's last visit for all outcomes

September 1, 2014

Completed
Last Updated

January 24, 2025

Status Verified

January 1, 2025

Enrollment Period

6 months

First QC Date

March 10, 2014

Last Update Submit

January 21, 2025

Conditions

Obesity

Outcome Measures

Primary Outcomes (2)

  • Delay discounting rate

    Degree to which future rewards are devalued

    1 hour

  • Food reinforcement

    Participant's valuation of food items.

    1 hour

Study Arms (2)

Obese

Obese individuals

Non-obese

Non-obese individuals

Eligibility Criteria

Age18 Years+
Sexall
Healthy VolunteersYes
Age GroupsAdult (18-64), Older Adult (65+)
Sampling MethodNon-Probability Sample
Study Population

Amazon Mechanical Turk users

You may qualify if:

  • Be a registered Amazon Mechanical Turk user.

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Related Publications (1)

  • Epstein LH, Jankowiak N, Lin H, Paluch R, Koffarnus MN, Bickel WK. No food for thought: moderating effects of delay discounting and future time perspective on the relation between income and food insecurity. Am J Clin Nutr. 2014 Sep;100(3):884-90. doi: 10.3945/ajcn.113.079772. Epub 2014 Jul 9.

    PMID: 25008855DERIVED

MeSH Terms

Conditions

Obesity

Condition Hierarchy (Ancestors)

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

Study Design

Study Type
observational
Observational Model
COHORT
Time Perspective
CROSS SECTIONAL
Sponsor Type
OTHER
Responsible Party
PRINCIPAL INVESTIGATOR
PI Title
Professor

Study Record Dates

First Submitted

March 10, 2014

First Posted

March 31, 2014

Study Start

December 1, 2012

Primary Completion

June 1, 2013

Study Completion

September 1, 2014

Last Updated

January 24, 2025

Record last verified: 2025-01