The Epidemiology of ADHD Across the Lifespan

This chapter explores the epidemiology of attention-deficit/hyperactivity disorder (ADHD) across different stages of life, examining how prevalence rates, symptom presentation, and functional impairments evolve from childhood through adulthood. The chapter begins with an analysis of ADHD prevalence in childhood and adolescence, focusing on gender differences, ADHD subtypes, and racial and socioeconomic disparities in diagnosis and treatment access. It then explores the developmental trajectory of ADHD symptoms, detailing how hyperactivity often declines with age, while inattention and impulsivity persist, contributing to lifelong challenges in academic, occupational, and social domains. Discussion also highlights the underdiagnosis and misdiagnosis of ADHD in adults, emphasizing the barriers to healthcare access and disparities in treatment-seeking behavior among different demographic groups. The impact of comorbid conditions, such as anxiety disorders, depression, and substance use disorders, is explored to underscore the multifaceted burden of ADHD across the lifespan. The chapter further examines treatment patterns and accessibility, discussing regional and socioeconomic differences in medication use, behavioral therapy, and multimodal interventions. Public health initiatives aimed at improving awareness, promoting early diagnosis, and expanding access to ADHD care are also addressed. By providing a lifespan perspective, this chapter highlights the importance of age-specific interventions, evidence-based treatment strategies, and policy-driven approaches to improving the long-term outcomes of individuals with ADHD.