you might be right.

The nine countries with the largest number of people with dementia in 2010
(1 million or more) were China (5.4 million), USA (3.9 million), India (3.7 million), Japan (2.5
million), Germany (1.5 million), Russia (1.2 million), France (1.1 million) Italy (1.1 million) and
Brazil (1.0 million).

Japan 127,341,000 2,500,000 rate=0.0196
china 1,367,180,000 5,400,000 rate=0.00395

that means 5 times.

所有跟帖： 

• 他说是65岁以上人群，基数不同。prevalance 是与全国人口相比。此处不是，所以差别很大。但我不清楚是否高达25%。 -欲千北- ♂ (0 bytes) () 10/10/2014 postreply 05:50:41