Various types of psychiatric disorders co-occur with OCD, including neurodevelopmental disorders (NDDs), mood disorders, anxiety disorders, severe mental illnesses (SMIs), and personality disorders (2, 8, 9). The understanding of comorbidities among psychiatric disorders is of immense clinical importance to inform primary diagnostic ascertainment, treatment planning and long-term management. Comorbidities also shed light on putative shared etiopathogenetic and neurobiological underpinnings.
