Table 1.
Worldwide prevalence of dementia in different studies
| Authors | Country | Sample size | Lower age limit, years | Years of survey | Prevalence rate, % |
|---|---|---|---|---|---|
| El Tallawy et al, 201238 | Egypt (Al-Quseir city) | 4,329 | 50 60 |
2009–2011 | 2.01%, ≥50 years 3.83%, ≥60 years 8.12%, ≥70 years 13.5%, ≥80 years |
| El Tallawy et al, 20107 | Egypt (New Valley) | 8,173 | 50 60 |
2005–2008 | 2.26%, ≥50 years 4.45%, ≥60 years |
| Mura et al31 | France | 65 | 7.9% | ||
| Bottino et al32 | Brazil (Sao Paulo) | 1,109 | 65 | 8.84% | |
| Plassman et al33 | United States | 856 | 71 | 13.9% | |
| Custodio et al34 | Peru (Cercado de Lima) | 1,532 | 65 | 6.72% | |
| Dong et al26 | People’s Republic of China | 87,761 | 60 | 1980–2004 | 2.8% |
| Shaji et al35 | India (Kerala) | 1,934 | 65 | 3.36% | |
| Berr et al36 | Europe | 65 | 5.9%–9.4% | ||
| Rahkonen et al37 | Finland | 601 | 75 | 1998 | 22.8% |
| Lobo et al23 | Europe | 2,346 | 65 | 1990 | 6.4% |