Alzheimers/Dementia Death rate (per 100,000)
1. Finland
2 United States 45.58
3 Canada 35.50
4 Iceland 34.08
5 Sweden 32.41
6 Switzerland 32.25
….
53. China 4.7
您可能有一点猜对了。非洲人老年痴呆死亡率世界最低。但不是因为他们不强用脑子，
而是因为他们活到老年的太少了。
再看看美国自己的统计，用脑多的白人 比用脑少的黑人得老年痴呆率低的多：
Alzheimers/Dementia epidemiology in the United States:
- Proportion of People With Alzheimer’s Disease in the United States by Age: (Alzheimer’s Association) 85+ years – 38%, 75-84 years, 44%, 65-74 years, 15%, <65 years, 4%
Racial Makeup of Alzheimer’s
65-74 Years of Age
- 2.9% Caucasian
- 9.1% African American
- 7.5% Hispanic
75-84 Years of Age
- 10.9% Caucasian
- 19.9% African American
- 27.9% Hispanic
85 Years of Age and above
- 30.2% Caucasian
- 58.6% African American
- 62.9% Hispanic
