Adverse Childhood Experiences and Anorexia Nervosa: Mediating Mechanisms and Risk by Adversity Patterns

Area of Science:

• Psychiatry
• Psychology
• Public Health

Background:

• Adverse childhood experiences (ACEs) are linked to various mental health issues.
• Anorexia nervosa (AN) is a serious eating disorder with complex etiology.
• Understanding the pathways from ACEs to AN is crucial for effective interventions.

Purpose of the Study:

• To investigate the mediating mechanisms between ACEs and AN.
• To determine if distinct ACE exposure patterns influence AN risk and mediation pathways.
• To identify potential targets for intervention in individuals with AN and a history of trauma.

Main Methods:

• Utilized data from 9746 female individuals in nationally representative Japanese surveys.
• Assessed ACEs using a 15-item Japanese ACE questionnaire.
• Employed causal mediation analysis, structural equation modeling, and latent class analysis (LCA) to identify ACE patterns and mediation pathways.

Main Results:

• Higher ACE exposure correlated with increased AN prevalence.
• Loneliness, psychological distress, and brooding rumination emerged as significant mediators, forming a 'negative affectivity' factor.
• Latent class analysis identified four ACE profiles, with all profiles showing higher AN prevalence than the 'low adversities' group, though differences were modest.

Conclusions:

• The cumulative number of ACEs, not specific patterns, is the primary driver of increased AN risk.
• Negative affectivity consistently mediates the relationship between ACEs and AN across different exposure patterns.
• Targeting negative affectivity presents a promising therapeutic strategy for individuals with AN exposed to trauma.