The Epidemiological Approach to Disability: The Specific Burden of Dementia
The ageing of the baby -boom generations and the continuous increas e in life expectancy are two combined phenomena which lead to an increase in both the number and the proportion of elderly people. According to projections for France, one person out of three will be aged 60 years and over in 2050 , and the group of 75 years and older would increase from 4. 9 millions to 10.9 millions (i.e. +120 per cent) , and the group of the oldest -old , the 85 years and more, would grow from 1. 1 to 4.2 millions (i.e. +280 per cent) .