Randomized Controlled Experiment of Dieting in Pairs

NCT02898844 | Completed

• 1 other identifier: 13-000666
• Study Type: interventional
• Target: 164
• Locations: 0 countries
• Sites: N/A

Brief Summary

This study examined how dieting with a partner affects weight loss, diet adherence, psychological well-being, and cortisol.

Conditions

Dietary Modification

Keywords

dieting; dyads; psychological well-being; weight loss; cortisol

Outcome Measures

Primary Outcomes (3)

• Psychological well-being measured via electronic questionnaires

  ~3 days after end of 3-week manipulation

• Weight loss measured via pounds

  ~3 days after end of 3-week manipulation

• Diet adherence measured via daily calorie counts

  up to 3-week

Secondary Outcomes (1)

• Cortisol measured via 2 days diurnal cortisol

  1 day after end of 3-week manipulation

Study Arms (3)

Control Condition

NO INTERVENTION

Neither roommate dieted.

Mixed Diet Condition

EXPERIMENTAL

Low-calorie diet: One roommate in each pair was randomly assigned to a 1200-calorie/day diet, while the other roommate was instructed to eat normally.

Behavioral: Mixed Diet Condition

Both Diet Condition

EXPERIMENTAL

Low-calorie diet: Both roommates in each pair were randomly assigned to a 1200-calorie/day diet.

Behavioral: Both Diet Condition

Interventions

Mixed Diet Condition BEHAVIORAL

One roommate dieted and the other ate normally.

Mixed Diet Condition

Both Diet Condition BEHAVIORAL

Both roommates dieted.

Both Diet Condition

Eligibility Criteria

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

You may qualify if:

• Female
• Over 18 years of age
• Interested in dieting in the coming 12 months
• self-reported BMI over 18.5
• \< 5 kg weight change in previous 3 months
• Have a university meal plan
• Have a roommate also willing/eligible to participate

You may not qualify if:

• Recent/current history of major medical disorder
• Pregnancy/lactation
• History of eating disorder
• Use of lipid-lowering medications
• Use of weight-altering/metabolism-altering medications
• Smoking

Sponsors & Collaborators

• A. Janet Tomiyama: lead

Related Publications (4)

• Spielberger CD, Gorsuch RL, Lushene RE. State-trait anxiety inventory (self-evaluation questionnaire). Consulting Psychologists Press: 1970.

  BACKGROUND

• Radloff, L. S. The CES-D scale a self-report depression scale for research in the general population. Applied psychological measurement, 1(3): 385-401, 1977.

  BACKGROUND

• Fairburn CG, Beglin SJ. Assessment of eating disorders: interview or self-report questionnaire? Int J Eat Disord. 1994 Dec;16(4):363-70.

  PMID: 7866415 BACKGROUND

• Cohen S, Kamarck T, Mermelstein R. A global measure of perceived stress. J Health Soc Behav. 1983 Dec;24(4):385-96. No abstract available.

  PMID: 6668417 BACKGROUND

MeSH Terms

Conditions

Psychological Well-Being; Weight Loss

Condition Hierarchy (Ancestors)

Personal Satisfaction; Behavior; Body Weight Changes; Body Weight; Signs and Symptoms; Pathological Conditions, Signs and Symptoms

Study Officials

• A. Janet Tomiyama, PhD

  University of California, Los Angeles

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: NONE
• Purpose: BASIC SCIENCE
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: SPONSOR INVESTIGATOR
• PI Title: Faculty Sponsor

Study Record Dates

• First Submitted: September 8, 2016
• First Posted: September 13, 2016
• Study Start: October 1, 2013
• Primary Completion: December 1, 2014
• Study Completion: December 1, 2014
• Last Updated: September 13, 2016

Record last verified: 2016-09