Silver Book Fact
Alzheimer’s Disease is the most common type of dementia; it accounts for an estimated 60 to 80 percent of cases.
Alzheimer's Association. 2012 Alzheimer’s Disease Facts and Figures. Alzheimers Dement. 2012; 8(2): 131-68. http://www.alzheimersanddementia.com/article/S1552-5260(12)00032-5/fulltext