Behavioural Development, Long-term Outcomes and Opportunities to Optimize Youth Mental Health Trajectories

This is a long-term study following young people aged 9 to 25 in Canada to understand how mental health problems develop over time and what helps. It includes both young people seeking mental health support and those at risk due to family history, social stressors, or chronic illness, to find ways to improve early mental health care. **You may be eligible if...** - You are between 9 and 25 years old - You can read and understand English or French - A parent or guardian is available to consent if you are under 18 - You have made at least one visit to a health or community service for a mental health concern, OR a parent or sibling has received psychiatric care, OR you are connected with community services for social challenges, OR you have a chronic physical illness **You may NOT be eligible if...** - You cannot communicate verbally due to a neurological condition or intellectual disability - You have already been diagnosed with a psychiatric condition and are currently receiving prescribed treatment for it Talk to your doctor to see if this trial is right for you.