Understanding Physical and Behavioral Traits in Overweight and Obese Adults

This observational study aims to understand the physical and behavioral characteristics (phenotype) of adults who are overweight or obese. Researchers will look at hormones, metabolism, food preferences, fitness levels, sleep patterns, and thought processes in people across different weight categories. They will also collect genetic material to study how internal codes might influence body weight. The goal is to better understand the factors that impact weight loss and regain. You may be eligible if you are an adult (18-100 years old) who is healthy and falls into the normal weight, overweight, or obese categories. This study is currently unclear on its recruitment status.

Study design
This is an observational study planning to enroll 2000 participants. It is not a treatment study but aims to describe characteristics of different weight groups.
What's involved
Participants will undergo a physical exam, electrocardiogram (ECG), blood and urine tests, and will be asked to record their food intake for 7 days. Menstruating women will also have metabolic studies.
Compensation
Not stated in the trial record.
Follow-up
The primary endpoint, measuring physical and behavioral traits, is assessed at two weeks.

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NCT00428987

Physical and Behavioral Traits of Overweight and Obese Adults

Recruiting
Not specifiedAges 18+Observational
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
~2,000 participants
Updated 2026-09-01 on ClinicalTrials.gov

At a glance

Recruiting sites
1 of 1 listed site is recruiting right now
RecruitingSuspended, closed, or not yet open
What they're measuring
Phenotype (physical and behavioral traits) of overweight and obese people
Measured over Two weeks
Obesity
Healthy Volunteers
1 sites across 1 states
Maryland1
  • Ranganath Muniyappa, M.D. · PRINCIPAL_INVESTIGATOR · National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)

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  • Phenotype (physical and behavioral traits) of overweight and obese peopleTwo weeks

    The aim of this study is to extensively phenotype subjects with varying degrees of obesity, as well as those with rare adipose disorders such as multiple symmetric lipomatosis (Madelung s disease), Dercums disease (adiposis dolorosa) and lipedema; to assess their hormonal, metabolic, cognitive and behavioral traits.