Association between bullying victimization and obsessive-compulsive disorder: a population-based, genetically...

Area of Science:

• Psychiatry
• Genetics
• Developmental Psychology

Background:

• Bullying victimization is a significant environmental stressor with potential long-term mental health consequences.
• The relationship between bullying and obsessive-compulsive disorder (OCD) remains under-investigated.
• Understanding this link is crucial for developing targeted interventions and support systems.

Purpose of the Study:

• To investigate the association between bullying victimization and the risk of developing obsessive-compulsive disorder (OCD) and obsessive-compulsive symptoms (OCS).
• To control for genetic and environmental factors using a genetically informative twin study design.
• To explore potential causal pathways and confounding factors in the bullying-OCD relationship.

Main Methods:

• A longitudinal, population-based study of 16,030 twins from the Child and Adolescent Twin Study in Sweden.
• Assessment of self-reported bullying victimization at age 15.
• Clinical diagnosis of OCD and self-reported obsessive-compulsive symptoms (OCS) at ages 18 and 24, analyzed using discordant twin comparisons (monozygotic and dizygotic).

Main Results:

• At the population level, increased bullying victimization was associated with a higher likelihood of OCD diagnosis and OCS.
• These associations were attenuated and became non-significant in monozygotic twin comparisons, indicating genetic confounding.
• The findings suggest that genetic factors, rather than a direct causal link, likely explain the observed association between bullying and OCD/OCS.

Conclusions:

• The association between bullying victimization and OCD/OCS is likely explained by shared genetic vulnerabilities.
• A strong causal effect of bullying on OCD is unlikely.
• Evocative gene-environment correlations may play a role in the observed associations, warranting further investigation.