Medical complexity, prior health care use (number of ED visits and hospitalizations), and history of previous mental health diagnosis (including anxiety, depression, eating disorders, self-harm, suicidal ideation, intentional overdose, non-accidental ingestion, substance abuse, behavioral dysregulation disorders, and psychosis information) are collected from hospital admissions over the past two years leading up to the baseline hospitalization visit. COVID status and syndrome, respiratory illnesses, chronic diseases, CIHI Medical Complexity (such as Congenital or Genetic Defect complexity), and diagnostic and procedure codes for the presence of Medical Technology Assistance (CIHI CMC) information are gathered. Mortality causes, health care costs, length of hospital stay, length of PICU (Pediatric Intensive Care Unit) stay, need for and duration of mechanical ventilation, need for and duration of extracorporeal life support, need for and duration of dialysis, urban compared to rural status, and income quintile data are collected. Child social and material deprivation index quintile (CAN-Marg) is collected. Information on specific diseases such as asthma, inflammatory bowel disease, cystic fibrosis, sick cell anemia, type 1 diabetes, epilepsy and seizure disorder, chronic kidney disease, and Trisomy 21 is collected. Information on medical technologies such as gastrostomy tubes, tracheostomy, and ventriculoperitoneal shunts is also collected. Aggregated census data from Statistics Canada will be used to collect information about the number of people aged 0-21 years in each Canadian province.

Medical complexity, prior health care use (number of ED visits and hospitalizations), and history of previous mental health diagnosis, including anxiety, depression, eating disorders, self-harm, suicidal ideation, intentional overdose, non-accidental ingestion, substance abuse, behavioral dysregulation disorders, and psychosis information are collected from hospital admissions occurring after discharge from the baseline hospitalization visit. COVID status and syndrome, respiratory illnesses, chronic diseases, CIHI Medical Complexity ( such as Congenital or Genetic Defect complexity), and diagnostic and procedure codes for the presence of Medical Technology Assistance (CIHI CMC) information are gathered. Mortality causes, health care costs, length of hospital stay, length of PICU (Pediatric Intensive Care Unit) stay, need for and duration of mechanical ventilation, need for and duration of extracorporeal life support, need for and duration of dialysis, urban compared to rural status, and income quintile data are collected. Child social and material deprivation index quintile (CAN-Marg) is collected. Information on specific diseases such as asthma, inflammatory bowel disease, cystic fibrosis, sick cell anemia, type 1 diabetes, epilepsy and seizure disorder, chronic kidney disease, and Trisomy 21 is collected. Information on medical technologies such as gastrostomy tubes, tracheostomy, and ventriculoperitoneal shunts is also collected. Aggregated census data from Statistics Canada will be used to collect information about the number of people aged 0-21 years in each Canadian province.

Medical complexity, prior health care use (number of ED visits and hospitalizations), and history of previous mental health diagnosis, (including anxiety, depression, eating disorders, self-harm, suicidal ideation, intentional overdose, non-accidental ingestion, substance abuse, behavioral dysregulation disorders, and psychosis information) are collected from hospital admissions over the past two years leading up to the baseline hospitalization visit. COVID status and syndrome, respiratory illnesses, chronic diseases, CIHI Medical Complexity (such as Congenital or Genetic Defect complexity), and diagnostic and procedure codes for the presence of Medical Technology Assistance (CIHI CMC) information are gathered. Mortality causes, health care costs, length of hospital stay, length of PICU (Pediatric Intensive Care Unit) stay, need for and duration of mechanical ventilation, need for and duration of extracorporeal life support, need for and duration of dialysis, urban compared to rural status, and income quintile data are collected. Child social and material deprivation index quintile (CAN-Marg) is collected. Information on specific diseases such as asthma, inflammatory bowel disease, cystic fibrosis, sick cell anemia, type 1 diabetes, epilepsy and seizure disorder, chronic kidney disease, and Trisomy 21 is collected. Information on medical technologies such as gastrostomy tubes, tracheostomy, and ventriculoperitoneal shunts is also collected. Aggregated census data from Statistics Canada will be used to collect information about the number of people aged 0-21 years in each Canadian province.

Medical complexity, prior health care use (number of ED visits and hospitalizations), and history of previous mental health diagnosis, including anxiety, depression, eating disorders, self-harm, suicidal ideation, intentional overdose, non-accidental ingestion, substance abuse, behavioral dysregulation disorders, and psychosis information are collected from hospital admissions occurring after discharge from the baseline hospitalization visit. COVID status and syndrome, respiratory illnesses, chronic diseases, CIHI Medical Complexity ( such as Congenital or Genetic Defect complexity), and diagnostic and procedure codes for the presence of Medical Technology Assistance (CIHI CMC) information are gathered. Mortality causes, health care costs, length of hospital stay, length of PICU (Pediatric Intensive Care Unit) stay, need for and duration of mechanical ventilation, need for and duration of extracorporeal life support, need for and duration of dialysis, urban compared to rural status, and income quintile data are collected. Child social and material deprivation index quintile (CAN-Marg) is collected. Information on specific diseases such as asthma, inflammatory bowel disease, cystic fibrosis, sick cell anemia, type 1 diabetes, epilepsy and seizure disorder, chronic kidney disease, and Trisomy 21 is collected. Information on medical technologies such as gastrostomy tubes, tracheostomy, and ventriculoperitoneal shunts is also collected. Aggregated census data from Statistics Canada will be used to collect information about the number of people aged 0-21 years in each Canadian province.