Mental health has become the world’s leading cause of disability, and three key findings should reshape how we approach prevention and treatment. First, nearly 1.2 billion people globally are affected—a figure that demands urgent policy and healthcare responses. Second, depression and anxiety drive 60% of all mental health disability burden, making these conditions primary targets for intervention and research investment.
Third, and perhaps most actionable for public health planning, approximately 50% of mental health disorders begin before age 14, underscoring the critical importance of early detection and childhood prevention strategies. This finding suggests that investing in school-based mental health screening, family support programs, and adolescent mental health services could prevent or mitigate disability in billions of people. Understanding these patterns allows healthcare systems, policymakers, and communities to prioritize interventions where they will have the greatest population-level impact.
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