ABSTRACT
Disorders of cognition, primarily dementia and delirium, are highly prevalent among older people: the age-standardized prevalence for those >60 years varied in a narrow band, 5%–7% in most world regions, with a higher prevalence in Latin America (8.5%) and a distinctively lower prevalence in the four sub-Saharan African regions (2%–4%). It was estimated that 35.6 million people lived with dementia worldwide in 2010, with numbers expected to almost double every 20 years, to 65.7 million in 2030 and 115.4 million in 2050. In 2010, 58% of all people with dementia lived in countries with low or middle incomes, with this proportion anticipated to rise to 63% in 2030 and 71% in 2050 (Prince et al., 2013).
