How many people experience mental illness?
20% of adults are affected by some form of mental disorder every year. Anxiety disorders and depression are the most common mental illnesses. The remainder are affected by psychotic conditions such as schizophrenia and bipolar disorder, by eating disorders and other diagnoses.

How many people are seriously affected by mental illness?
3% of adults are affected by a severe mental disorder every year. The 'severe mental disorders' include schizophrenia, bipolar disorder and other forms of psychosis, some forms of depression, and anxiety disorders such as panic disorder and obsessive compulsive disorder. Schizophrenia is a persistent form of mental illness that affects approximately 1% of Australians at some stage in their lives. Bipolar disorder affects up to 2% of Australians at some time in their lives. Depression affects around 20%, and anxiety disorders around 10% at some time in life.

Does mental illness run in families?
Most people with a mental illness do not have family members with the illness. For some mental disorders there does not seem to be a link at all. For others, such as schizophrenia and bipolar disorder, a predisposition to the illness may be inherited – but even then, it is only one of several factors. The causes are not fully understood. It is likely that such mental disorders involve a biochemical imbalance and can be triggered by such things as stressful life events, drug abuse, hormonal changes or physical illness.

Is mental illness life-threatening?
Mental illness itself is not life-threatening. However, up to 12% of those seriously affected eventually kill themselves (compared to an average of 1% for the whole population). Effective, ongoing treatment is essential to minimise the risk of suicide.

What are the chances of recovering from mental illness?
Most people with mental illness recover well and are able to lead fulfilling lives in the community - when they receive appropriate ongoing treatment and support. However, only about half of those affected actually receive treatment. The majority of people who develop anxiety disorders improve over time with appropriate treatment and support. About 80% of people diagnosed with bipolar disorder also improve with ongoing treatment and support. The long-term outcome for schizophrenia can be better than many assume, especially where access to good treatment is consistent. About 20% of those diagnosed have an episode or two, then never experience symptoms again. About 60% improve over time and, with support, can live independently. For about 20%, symptoms are more persistent, treatments are less effective, and greater support services are needed.

How do I find out more?
It is important that you ask your doctor about any concerns you have. SANE Australia also produces a range of easy-to-read publications and multimedia resources on mental illness.

For more information about this topic see:
'The SANE Guide to Schizophrenia'
'The SANE Guide to Bipolar Disorder'
'The SANE Guide to Depression'
Use the Order Form which came with this Factsheet or visit the SANE Bookshop at www.sane.org

SANE Australia . . . Facts and figures about mental illness

©SANE Factsheet 13
This Factsheet may be freely downloaded, copied and distributed on condition no change is made to the contents. SANE Australia is not responsible for any actions taken as a result of information or opinions contained in the Factsheet. SANE Australia is a business name of Schizophrenia Australia Foundation.
[Version English, 2004]