Genetic Link Identified Between OCD and Eating Disorders, Increasing Comorbidity Risk
Recent research highlights a significant genetic correlation between Obsessive-Compulsive Disorder (OCD) and eating disorders. A genome-wide association study found a genetic correlation of 0.49 between the two conditions. This genetic overlap suggests shared biological pathways contributing to both disorders. A population study in Sweden, examining nearly 20,000 individuals with OCD and over 8,000 with anorexia, revealed that females with OCD had a 16-fold increased risk of also having anorexia, while males with OCD had a 37-fold increased risk. Furthermore, individuals initially diagnosed with OCD were 3.6 times more likely to develop anorexia later, and those first diagnosed with anorexia were 9.6 times more likely to develop OCD subsequently. These findings indicate that OCD and eating disorders co-occur far more frequently than would be expected by chance, with lifetime overlap ranging from 14% to 44% depending on the eating disorder subtype and follow-up duration. A meta-analysis of 32 studies showed... 
