Table 1

Demographic details

Early onset ADLate onset AD
Number2044
Mean age (y) (SD)57.8 (4.1)76.4 (4.5)
MMSE (SD)18.8 (4.9)21.8 (3.6)
Length of history (y) (SD)2.1 (1.3)2.2 (1.4)