Final answer:
The prevalence of mental disorders among Canadian adolescents and adults is not specified, but U.S. statistics suggest anxiety disorders and mood disorders are the most common, affecting a significant portion of the population with varying lifetime prevalences.
Step-by-step explanation:
The prevalence of mental disorders among Canadian adolescents and adults varies, and comprehensive data for Canada specifically on this topic is not provided in the reference material. However, we can refer to U.S. statistics for a general understanding. Anxiety disorders are reported to be the most common mental health condition, affecting about 18% of U.S. adults annually, and 28% over a lifetime. Mood disorders, which include major depression and bipolar disorder, are the second most common, affecting approximately 10% of U.S. adults annually and 21% over a lifetime. Additionally, substance use disorders are significant health concerns, with criteria for diagnosis outlined in the DSM-5. These disorders can lead to high levels of healthcare utilization and are often comorbid with other mental health conditions.
To gain insight into the prevalence of mental disorders compatible with a diagnosis, it's crucial to refer to localized health surveys and studies, as prevalence rates can vary between countries and over time. For instance, the National Survey on Drug Use and Health provides detailed mental health findings for the U.S., but equivalent Canadian data would be collected by different institutions such as Statistics Canada or the Canadian Mental Health Association.