The largest genetic study of anxiety symptom severity to date has found the condition is not only heritable but shows significant genetic overlap with heart disease, gut disorders, and migraine, in fi

Key Points:

• A major new genome-wide association study (GWAS) led by Dr. Megan Skelton and colleagues analyzed anxiety symptoms on a continuous scale in 693,869 people of European ancestry, identifying 74 genetic loci linked to anxiety severity, including 39 novel ones.
• The study revealed significant genetic correlations between anxiety and several physical conditions, most notably a strong overlap with irritable bowel syndrome (IBS) at 0.57, suggesting shared genetic risk factors but not implying direct causation.
• Genetic variants explain about 6% of the variation in anxiety symptom severity, indicating that environmental factors and gene-environment interactions play a much larger role in anxiety prevalence and severity.
• Unlike previous binary case-control studies, this dimensional approach to measuring anxiety symptoms offers greater statistical power and may serve as a methodological template for future psychiatric genetics research.
• Limitations include the study’s focus on individuals of European ancestry and reliance on self-reported symptoms; findings do not yet translate into changes in clinical treatment or personalized risk assessment and require further research across diverse populations.