Mental Disorders Now Global Leading Cause of Disability, Surpassing CVD & Cancer
A new Lancet study reveals mental disorders have become the leading cause of disability globally, affecting nearly 1.2 billion people in 2023, almost doubling since 1990. Driven largely by anxiety and depression, this crisis disproportionately impacts youth and women, demanding urgent global and national mental health action. India faces a significant surge in anxiety disorders.
Key Highlights
- Mental disorders are now the leading cause of years lived with disability globally.
- Nearly 1.2 billion people worldwide lived with a mental disorder in 2023.
- This burden has almost doubled since 1990, primarily due to anxiety and depression.
- Women and individuals aged 15-19 are disproportionately affected by mental disorders.
- In India, anxiety disorders prevalence surged by 123.5% between 1990 and 2023.
- The study highlights inadequate global response and urgent need for mental health investment.
A groundbreaking new study published in The Lancet journal reveals that mental disorders have emerged as the leading cause of disability worldwide, surpassing traditionally recognized burdens like cardiovascular diseases, cancer, and musculoskeletal conditions. This critical finding, based on the latest Global Burden of Diseases, Injuries, and Risk Factors Study (GBD 2023), underscores a deepening global public health crisis.
The study, led by researchers from the University of Queensland, Queensland Centre for Mental Health Research, and the University of Washington, found that an alarming 1.2 billion people globally were living with a mental disorder in 2023. This figure represents nearly a twofold increase since 1990, highlighting a significant and accelerating rise in the prevalence and impact of mental health conditions over the past three decades.
The surge in mental disorder burden is predominantly driven by rising cases of anxiety disorders and major depressive disorder. These conditions contribute most significantly to 'Years Lived with Disability' (YLDs), a metric used to quantify the non-fatal health loss due to disease or injury. Mental disorders accounted for over 17% of all YLDs worldwide in 2023, solidifying their position as the single largest contributor to disability. While mental disorders rank as the fifth leading cause of overall disease burden globally when considering Disability-Adjusted Life Years (DALYs – which combine YLDs and years of life lost due to premature death), their pre-eminence in causing disability is a stark indicator of their pervasive impact on quality of life.
Demographically, the study identifies specific populations that are disproportionately affected. Women of all ages and young people, particularly those aged 15-19 years, bear the highest burden of mental disorders. In 2023, approximately 620 million women globally were living with a mental disorder, compared to 552 million men. This disparity among women is attributed to a complex interplay of factors including higher exposure to domestic violence, sexual abuse, increased caregiving responsibilities, and systemic gender inequalities.
The findings are particularly pertinent for countries like India, where mental health challenges are intensifying. The study reported that the age-standardized prevalence of anxiety disorders across both sexes in India surged by 123.5% between 1990 and 2023, rising from nearly 2,592 to 5,793 per one lakh population. This increase was even more pronounced among Indian women, with a 136.7% rise during this period, compared to a 102% increase among men.
Previous Global Burden of Disease studies, specifically looking at India between 1990 and 2017, had already indicated mental disorders as a leading cause of non-fatal disease burden. In 2017, an estimated 197.3 million Indians, or about one in seven, were affected by various mental disorders, with depressive and anxiety disorders being the most prevalent. The proportional contribution of mental disorders to India's total disease burden (DALYs) nearly doubled from 2.5% in 1990 to 4.7% in 2017. These earlier findings, coupled with the latest Lancet study, paint a concerning picture of a growing mental health crisis in the country.
The researchers emphasize that these rising trends likely reflect both the lingering effects of pandemic-related stress and longer-term structural factors such as poverty, insecurity, abuse, violence, and declining social connectedness. Despite the escalating scale of this crisis, the global response to mental disorders remains woefully inadequate. Analyses from the GBD study suggest that only about 9% of individuals with major depressive disorder globally receive minimally adequate treatment, with less than 5% receiving proper care in 90 countries. In India, a significant shortage of mental health professionals, low public awareness, and persistent stigma continue to hinder access to care.
Addressing this growing challenge will necessitate sustained investment in robust mental health systems, expanded access to affordable care, and coordinated global and national action to better support populations most at risk. The study advocates for improved surveillance, early prevention strategies, and targeted support, especially for adolescents and women, to mitigate the worsening burden of mental disorders.
This new data serves as a critical call to action for governments, healthcare providers, and communities worldwide, particularly in rapidly developing nations like India, to prioritize mental health in public policy and resource allocation. The societal and economic ramifications of this escalating disability burden are immense, impacting families, reducing workforce participation, and straining already stretched health systems.
Frequently Asked Questions
What is the main finding of the new Lancet study on mental disorders?
The new study in The Lancet found that mental disorders have become the leading cause of disability worldwide, surpassing cardiovascular diseases, cancer, and musculoskeletal conditions, accounting for over 17% of all years lived with disability globally in 2023.
How many people are affected by mental disorders globally, and how has this changed over time?
Nearly 1.2 billion people worldwide were living with a mental disorder in 2023. This number has almost doubled since 1990, indicating a significant increase in mental health challenges globally.
Which mental disorders are primarily driving this increase in disability?
The increase in mental disorder-related disability is largely driven by the rising prevalence of anxiety disorders and major depressive disorder.
Which demographics are most affected by the rising burden of mental disorders?
The study highlights that women of all ages and young people, particularly adolescents aged 15-19 years, are disproportionately impacted by the global burden of mental disorders.
What are the implications for India based on this study?
In India, the age-standardized prevalence of anxiety disorders has surged by 123.5% between 1990 and 2023. The findings underscore the urgent need for substantial investment in mental health infrastructure, prevention, and accessible treatment options across the country.