| Gene |
Chromosome |
AD category |
Age of onset |
| Presenilin I |
14 |
Early onset familial AD |
25-60 years |
| APP |
21 |
Early onset familial AD |
40-64 years |
| Presenilin II |
1 |
Early onset familial AD |
45-84 years |
| APOE e4 |
19 |
Early to late onset familial and sporadic AD |
>50 years |
|
