Epidemiology
Evidence from well-planned, representative epidemiological surveys is scarce in many regions, particularly in low-income countries. However, a 2009 study by Alzheimer Disease International estimated the global prevalence of dementia will almost double every 20 years, from 35.6 million in 2010, to 65.7 million by 2030 and 115.4 million by 2050. Around two thirds of individuals with dementia live in low and middle income countries, where the sharpest increases in numbers are predicted. A recent survey done by Harvard University School of Public Health and the Alzheimer's Europe consortium revealed that the second leading health concern (after cancer) among adults is Dementia.
Read more about this topic: Dementia