“…To our knowledge, our study is the first to evaluate children and youth who first present to the ED with any MH-related condition. Unlike other studies, 12,13,43,44 we minimized selection bias by including all MH diagnoses across a range of hospitals in a universal access health care system. Although administrative datasets provide insights into a large population of patients, they have inherent limitations, including potential coding errors and a lack of data on contributing factors (e.g., substance use), education levels, and use of nonphysician community MH services (e.g., psychologists and social workers).…”