For example, the UK has prioritized the collection of high-quality prevalence data of mental disorders among children and youth, disaggregated by key sociodemographic factors, every three years beginning in 2021, acknowledging the importance of routinely collected and timely data for informing policy.[26] Canada faces significant temporal gaps in available mental health data for children and youth. By working closely with provincial/territorial mental health policymakers and people with lived experiences, to understand their collectively informed needs, Canada can ensure that mental health data will be used and will be useful for evidence-informed mental health policies. Int J Popul Data Sci. 2018;3(3):1-11. 17 Orpana H, Vachon J, Dykxhoorn J, McRae L, Jayaraman G. Monitoring positive mental health and its determinants in Canada: the development of the positive mental health surveillance indicator framework. Keywords: surveillance; child and adolescent psychiatry; mental health services; epidemiology; community mental health services; administrative data; population-level surveys; data linkage; methods EN surveillance child and adolescent psychiatry mental health services epidemiology community mental health services administrative data population-level surveys data linkage methods 819 825 7 10/25/23 20231101 NES 231101 Introduction Public health surveillance is defined as the continuous and dynamic process of observing and measuring a target in a specific population over time and space. [Extracted from the article]