This study aimed to assess dynamic changes in emotional and behavioral problems among children with Attention-Deficit/Hyperactivity Disorder (ADHD) in Shanghai, China. Using a longitudinal design, school-aged children with ADHD were enrolled and followed, with emotional and behavioral measures repeatedly assessed. Due to varying COVID-19 measures and changing epidemics, and no intervention was admitted, an event-based longitudinal design was adopted, using calendar time from the enrollment of…
