Changes in Depression and Anxiety Among Children and Adolescents From Before to During the COVID-19 Pandemic

Importance: There is a growing body of high-quality cohort-based research that has examined changes in child and adolescent mental health during the COVID-19 pandemic vs before the pandemic. Some studies have found that child and adolescent depression and anxiety symptoms have increased, while others have found these symptoms to have remained stable or decreased. Objective: To synthesize the available longitudinal cohort-based research evidence …