by Carol Brayne and Bruce Miller
PLoS Med 14(3): e1002275 – Published: March 28, 2017
Current evidence suggests substantial increases in dementia numbers across the world, although there is evidence in some countries of age for age reductions in both prevalence and incidence across time. We know that a generalized phenomenon of population aging is occurring across the globe, and that in low- and middle-income countries, many of the diseases associated with affluence are rising in incidence. These population changes do not affect all people equally. In particular, people who are disadvantaged socioeconomically have lives that are shorter than those of richer population groups and are even so at higher risk for dementia — such groups have not, to date, been well served by the major investments in dementia research.