Our research aims to investigate the bidirectional relationships between somatic conditions and neurodevelopmental disorders, as well as the impact of neurodevelopmental disorders on patient mortality. Specifically, we will examine how various somatic conditions-such as hypertensive disorders, dyslipidemia, autoimmune diseases (e.g., rheumatoid arthritis, celiac disease), metabolic diseases (e.g., diabetes, obesity), cardiovascular diseases, cancer, and psychiatric disorders-contribute to the development of neurodevelopmental disorders, primarily autism spectrum disorder (ASD), attention deficit hyperactivity disorder (ADHD), and intellectual disability (ID). Conversely, we will also explore whether these neurodevelopmental disorders increase the risk of developing somatic conditions and assess their potential influence on patient mortality.