Alzheimer's disease is found in the elderly. As I get older, they will find more incidence rate by age in 65-69 years. The incidence of new cases about 3 people per thousand per year, but if the age is a period of time 85-89 years will find high 40.Found in every race, female than male found slightly. Probably because the female longevity. In these patients, about 2-4% of those older 60 years and found increased 2 times every 5 years after the age of 60 years.