This staggering figure represents a 95.5% increase in total cases since 1990, when approximately 599 million cases were recorded.
The comprehensive research, conducted as part of the Global Burden of Disease (GBD) Study 2023, evaluated 12 distinct categories of mental disorders across 204 countries and territories. It found that alongside the near-doubling of total cases, the age-standardized prevalence rate – which accounts for growing and aging populations – jumped by 24.2% over the 33-year period.
First author Dr. Damian Santomauro, Associate Professor at the Queensland Centre for Mental Health Research, said: “These rising trends may reflect both the lingering effects of pandemic-related stress and longer-term structural drivers such as poverty, insecurity, abuse, violence, and declining social connectedness.
She added: “Addressing this growing challenge will require sustained investment in mental health systems, expanded access to care, and coordinated global action to better support populations most at risk.”
In 2023, mental health conditions officially ranked as the leading driver of disability worldwide, accounting for 17.3% of all-cause global Years Lived with Disability (YLDs).
When measuring total overall health loss – combining lived disability with premature death – mental disorders accounted for 171 million Disability-Adjusted Life-Years (DALYs) in 2023.
The data exposed stark demographic disparities, revealing that the global crisis disproportionately impacts women and adolescents.
In 2023, roughly 620 million women worldwide were living with a mental disorder, compared to 552 million men. While males recorded higher instances of neurodevelopmental and behavioral conditions, women experienced significantly higher rates of depression and anxiety.
Alarmingly, the overall health burden of mental illness peaked most intensely among teenagers aged 15 to 19. This can have an adverse effect on their “trajectories for education, employment, and relationships,” as per co-author Dr. Alize Ferrari, Honorary Associate Professor at the Queensland Centre for Mental Health Research.
Geographically, the mental disorders burden varied by territory, ranging from a low of 1,302.4 DALYs per 100,000 population in Viet Nam to a high of 3,555.8 per 100,000 in the Netherlands.
The report issues an urgent mandate for international policymakers to pivot from reactive treatment to proactive prevention, calling for robust domestic surveillance systems and coordinated global investment before healthcare networks are entirely overwhelmed.
The full study can be found here.
