Key facts
Dementia is a syndrome in which there is deterioration in memory, thinking, behaviour and the ability to perform everyday activities.
Although dementia mainly affects older people, it is not a normal part of ageing.
Worldwide, 47.5 million people have dementia and there are 7.7 million new cases every year.
Alzheimer's disease is the most common cause of dementia and may contribute to 60–70% of cases.
Dementia is one of the major causes of disability and dependency among older people worldwide.
Dementia has physical, psychological, social and economical impact on caregivers, families and society.