The world's population is ageing. Currently there are an estimated 30 million people worldwide with dementia. Two thirds of them live in developing countries. This figure is set to increase to more than 100 million people by 2050. Much of this increase will be in rapidly developing and heavily populated regions such as China, India and Latin America.
Dementia primarily affects older people. Up to the age of 65, dementia develops in only about 1 person in 1000. The chance of having the condition rises sharply with age to 1 person in 20 over the age of 65. Over the age of 80, this figure increases to 1 person in 5.