Global Disparities in Mental Health Systems: A Comparative Cross-sectional Study of Ten Countries with Different Income Levels.

Background: Mental health disorders are a common cause of disability worldwide. Disparities exist between the mental health frameworks of high-income countries (HICs), upper middle-income countries (UMICs), and low- and middle-income countries (LMICs). LMICs have shortages in infrastructure, financial resources, laws, and workforce, resulting in significant gaps in treatment. This study compares mental health system indicators across 10 nations to examine how economic and policy-level factors influence service access and population-level burden. Methods: A cross-sectional comparative analysis was conducted using publicly available secondary data. Sources included the WHO Mental Health Atlas, World Bank Open Data, Global Burden of Disease (GBD), and national mental health policies. Five HICs (United States, United Kingdom, Germany, Australia, Japan) and five UMICs plus LMICs (Brazil, South Africa, India, Kenya, Nigeria) were selected. Mental health budget allocation, treatment gap, psychiatrist density, psychiatric bed availability, primary care integration, and disability-adjusted life years (DALYs) were assessed. Descriptive statistics and Pearson correlations were applied. Results: HICs allocated 6.1%-11.3% of health budgets to mental health, had lower treatment gaps (19%-32%) and higher psychiatrist densities (11.8-14.6/100,000). On the contrary, LMICs had a budget share below 1%, treatment gaps >75%, and psychiatrist densities <1. A strong positive correlation was observed between GDP per capita and the prevalence of psychiatrists (r = 0.77, Conclusions: Economic capacity and political commitment have a substantial impact on mental health systems. Strengthening the workforce, integrating services, and reforming legislation are essential to closing the gaps in treatment and achieving equity.