Anxiety, Depression & PTSD: Before and After Concussion

Mental Health Burden After Concussion

Concussions remain a widespread injury in Canada, with estimates of around 400,000 cases annually, though many go unreported or undiagnosed. Recent surveys indicate prevalence may be significantly higher than earlier administrative data suggested, particularly among youth and adults.

A large-scale study from the TRANSCENDENT program, drawing on routine care data from specialty clinics in Ontario between April 2024 and July 2025, found strikingly high rates of mental health issues early after injury. Among 1,639 patients (mostly young adults, two-thirds female), 45.2% exhibited moderate-to-severe anxiety symptoms and 60.7% moderate-to-severe depression symptoms within weeks of concussion. These figures exceed many prior estimates and highlight that mental health complications often emerge quickly and require prompt intervention to avoid chronicity.

Certain factors amplify vulnerability. Pre-existing anxiety or depression nearly doubles the odds of post-injury symptoms, while sleep difficulties, female sex, and injury mechanisms such as motor vehicle collisions or workplace incidents carry even higher risks—odds ratios reaching 3.68 for anxiety after car crashes. These patterns suggest that concussions from high-impact, non-sport events may trigger more severe psychological responses, including PTSD in trauma cases.

The stakes extend beyond individual suffering. Persistent symptoms contribute to functional limitations, lost productivity, and increased healthcare demands. In Canada, where pediatric concussion visits have quadrupled since 2010 and youth face elevated risks of mood disorders or self-harm post-injury, inaction risks compounding long-term disability. Broader advocacy pushes, including parliamentary bills for a national brain injury strategy introduced in 2025, reflect growing recognition of these systemic gaps.

Tensions arise in balancing early aggressive screening against resource constraints in primary care. While guidelines urge multidisciplinary approaches, under-detection remains common, particularly when mental health overlaps with cognitive or physical complaints. Sports-related cases draw public attention through ongoing discussions of CTE in professional hockey, but everyday injuries—from falls, assaults, or accidents—affect far larger numbers and often receive less scrutiny.