Dementia is characterised by significant cognitive impairment. Symptoms include memory, executive functioning, language, and movement impairments, and an inability to identify objects, people, sound or smell. Other symptoms may include behavioural disturbances, anxiety, apathy, delirium, and mood and sleep disturbances. Mental disorders are associated with a high prevalence of psychiatric comorbidities, and aging may increase the risk of developing comorbidities such as dementia.

What is the evidence for dementia?

Moderate to low quality evidence finds a small increased risk of dementia in older veterans with PTSD compared to older veterans without the disorder.

August 2021

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Dementia is characterised by significant cognitive impairment. Symptoms include memory impairment, aphasia (impaired language functioning), apraxia (aberrant movement), agnosia (inability to identify objects, people, sound or smell), and impaired executive functioning (for example, the ability to think abstractly, plan, initiate or stop actions). Other symptoms include behavioural disturbances, anxiety, apathy, delirium, and mood and sleep disturbances.

What is the evidence for dementia in people with bipolar disorder?

Moderate quality evidence funds a medium-sized increased risk of dementia in people with the disorder compared to people without the disorder. Moderate to high quality evidence finds a medium-sized decreased risk of dementia in people with the disorder who are taking lithium compared to those not taking lithium.

October 2021

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