Key Facts About Mental Illness

- Mental illness is a highly prevalent, life-threatening disease that affects millions of people all around the world.
- Mental illness strikes the young and often goes undiagnosed and untreated for many years.
- Mental illness threatens lives everywhere.
- Mental illness has a significant impact on human productivity.
- Mental illness has a staggering impact on the global economy.
- There are inadequate resources available for combating mental illness, despite its huge impact on human productivity and life.
- Mental illness is treatable: there is hope for people who have it.

- Mental illness is a highly prevalent, life-threatening disease that affects millions of people all around the world.
- One in one hundred people in the world develop schizophrenia.¹
- Mental illness does not discriminate: it strikes people of all ethnic groups and economic brackets.²
- Over 44 million people in the U.S. – one in five adults – suffer from a diagnosable mental disorder in a given year³, and over 5 million people are disabled by severe mental illness.²
- Two new cases of mental illness occur in the U.S. every second of every day – 60 million new cases each year.³
Sources: ¹ World Health Organization. ² National Alliance for Mental Health (NAMI). ³ Excerpt from The Numbers Count, National Institute of Mental Health (NIMH)
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- Mental illness strikes the young and often goes undiagnosed and untreated for many years.
- Half of those who will ever be diagnosed with a mental disorder show signs of the disease by age 14, three-quarters by age 25.¹
- Few get help: in recent years, about 80% of serious cases went untreated in poor countries, 35-40% in richer countries.
- There are pervasive delays in getting treatment: the median across disorders is nearly a decade, contributing to a greater severity, co-occurrence of mental illnesses, and lower success rates as people age.¹
Source: ¹ Prevalence, Severity, and Unmet Need for Treatment of Mental Disorders, World Health Organization World Mental Health Surveys, June 2004, Journal of the American Medical Association.
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- Mental illness threatens lives everywhere.
- Mental disorders are associated with over 90% of all reported suicide cases.¹
- In America, more people die from suicide than cancer, homicide¹ or HIV/AIDS. In 2001, there were twice as many deaths due to suicide than from HIV/AIDS.²
- Suicide claims the lives of a significant number of people with serious mental illness:
- One in ten people suffering from schizophrenia will commit suicide.³
- One in five people suffering from bipolar disorder will commit suicide.4
Source: ¹ World Health Organization and Center for Disease Control. ² National Institute of Mental Health (NAMI). ³ Treatment Advocacy Center. 4 Depression and Bipolar Support Alliance.
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- Mental illness has a significant impact on human productivity.
- Major depression is the leading cause of disability worldwide among persons aged five or older.¹
- Four of the ten leading causes of disability in developed countries are mental disorders (major depression, bipolar disorder, schizophrenia and obsessive-compulsive disorder).²
- Around the world, mental illness causes as many lost days of work as any physical problem such as cancer, heart attack or back pain.³
- Mental illness, including suicide, accounts for over 15% of the lost years of healthy life, also known as Disability Adjusted Life Years (DALYS) – more than all cancers and second only to all cardiovascular conditions.¹
Sources: ¹ National Institute of Mental Health (NAMI). ² World Health Organization. ³ Prevalence, Severity, and Unmet Need for Treatment of Mental Disorders, World Health Organization World Mental Health Surveys, June 2004, Journal of the American Medical Association.
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- Mental illness has a staggering impact on the global economy.
- Studies from Europe¹ have estimated that expenditures on mental disorders as a proportion of all health service costs are very high – 23% in The Netherlands and 22% in the U.K.²
- In 1990, costs related to mental illness in the U.S. were already significant³:
- Indirect costs for mental disorders totaled $79 billion – 80% of these costs stemmed from mortality costs.
- Major depression cost an estimated $23 billion in lost workdays.
- One study concluded that the aggregate yearly cost of mental disorders accounted for about 2.5% of the U.S. Gross Domestic Product.4
Sources: ¹ Meading et al., 1998; Patel and Knapp, 1998. ² For the UK., the figure is for inpatient expense only. ³ NCQA – Measuring the Quality of America’s Health Care (www.ncqa.org). 4 The World Health Report, Rice et al., 1990.
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- There are inadequate resources available for combating mental illness, despite its huge impact on human productivity and life.
- At the government level, mental diseases account for 12% of the global burden of disease, but the mental healthcare budgets of most countries are less than 1% of total healthcare expenditures.¹
- At the philanthropic level:
- Around the world, the stigma associated with mental illness creates a vicious cycle of alienation and discrimination that results in social and political isolation and inadequate treatment approaches and resources within the community.
- Despite a higher death rate, mental illnesses receiver a fraction of the charitable donations made to combat cancer or HIV/AIDS.
Source: ¹ World Health Organization.
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- There is hope for people living with mental illness.

For more information, please see Mental Health Organizations and Reference Library.