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Related Concept Videos

Binge Eating Disorders01:23

Binge Eating Disorders

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Binge eating disorder is a significant mental health condition characterized by recurrent episodes of excessive food consumption within a short period, accompanied by a perceived loss of control over eating behavior. Unlike occasional overeating, binge eating disorder is marked by distressing emotions such as guilt, shame, and anxiety following binge episodes. The disorder affects individuals across different ages and backgrounds, with profound implications for physical and psychological...
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Behavioral Genetics and Its Designs01:23

Behavioral Genetics and Its Designs

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Behavior genetics explores how genetic inheritance influences human behavior. It focuses on how genes, passed from parents to offspring, contribute to the development of behavioral traits and tendencies. This branch of genetics seeks to understand the complex interplay between inherited genetic factors and environmental influences in shaping our behaviors.
The primary methodologies used in behavior genetics include family studies, twin studies, and adoption studies, each providing unique...
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Bulimia Nervosa01:30

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Bulimia nervosa is a complex and severe eating disorder characterized by a cyclical pattern of binge-and-purge eating pattern. It generally involves an episode of binge eating, followed by compensatory behaviors such as vomiting, excessive exercise, laxative use, or fasting, to prevent weight gain. Despite often maintaining a normal weight, individuals with bulimia are intensely preoccupied with their body image and harbor an overwhelming fear of gaining weight. This can contribute to the...
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Assessment of the Gastrointestinal System II: Health Perception Pattern01:29

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Assessing the gastrointestinal (GI) system is a complex process that begins with collecting subjective data. This data, collected through patient interviews, provides crucial insights into the patient's health history, perception patterns, and lifestyle habits, all contributing significantly to GI health.
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Study Designs in Epidemiology01:20

Study Designs in Epidemiology

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Epidemiological study designs are fundamental tools for investigating the distribution, determinants, and control of health conditions in populations. They help researchers understand the relationships between exposures and outcomes, and they broadly fall into two categories: "observational" and "experimental" studies.
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Genome-wide Association Studies-GWAS01:11

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Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
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Updated: Sep 20, 2025

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The Eating Disorders Genetics Initiative 2 (EDGI2): study protocol.

Natasha Berthold1,2,3, Casey M MacDermod1, Laura M Thornton1

  • 1Department of Psychiatry, University of North Carolina at Chapel Hill, #7160, 101 Manning Drive, Chapel Hill, CBNC, 27599 - 7160, USA.

BMC Psychiatry
|May 26, 2025
PubMed
Summary
This summary is machine-generated.

The Eating Disorders Genetics Initiative 2 (EDGI2) study investigates the genetic underpinnings of anorexia nervosa, bulimia nervosa, binge-eating disorder, and ARFID. This global effort aims to expand sample size and diversity to advance eating disorder genetics research.

Keywords:
Anorexia nervosaAvoidant/restrictive food intake disorderBinge-eating disorderBulimia nervosaGenome-wide associationPsychiatric genetics

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Area of Science:

  • Genetics
  • Psychiatry
  • Epidemiology

Background:

  • The Eating Disorders Genetics Initiative 2 (EDGI2) is an expansion of prior research, focusing on anorexia nervosa, bulimia nervosa, binge-eating disorder, and avoidant/restrictive food intake disorder (ARFID).
  • The study prioritizes broad population representation and includes individuals with severe and/or longstanding illness.
  • EDGI2 is a registered clinical trial (NCT06594913) aimed at accelerating the understanding of eating disorder genetics.

Purpose of the Study:

  • To explore the role of genes and environment in the development of major eating disorders (EDs).
  • To increase sample size and participant representation across diverse ancestral backgrounds.
  • To include ARFID in large-scale genetic studies, addressing a gap in current research.

Main Methods:

  • Recruitment of 20,000 participants (18,700 cases, 1,300 controls) from the US, Mexico, Australia, New Zealand, Sweden, and Denmark.
  • Comprehensive phenotyping and genotyping using questionnaires and saliva samples (US, MX, AU, NZ, SE); national registers and archived bloodspots (DK).
  • Genome-wide association studies (GWAS), meta-analyses with external data, genetic correlation analyses, and polygenic risk score (PRS) calculations.

Main Results:

  • Genome-wide association studies (GWAS) will be conducted to identify genetic loci associated with EDs.
  • Analysis of genetic correlations with other psychiatric and metabolic traits will be performed.
  • Polygenic risk scores (PRS) will be calculated to assess genetic predisposition and potential for patient stratification.

Conclusions:

  • EDGI2 is poised to significantly advance the study of eating disorder genetics, which has historically lagged behind other psychiatric disorders.
  • The study will provide an unprecedented look at the genetic architecture of EDs by analyzing data at both diagnostic and symptom levels.
  • Findings have the potential for clinical translation through patient stratification and linking genetic risk loci to clinical phenotypes.