Table 1 Description of population investigated at the beginning (1999/2000) and at the end of the follow up (2003/2004)

Eligible

Non participants¹

Final population

Prevalent AD

Cognitively NC ²

AD free

N= 1353

n = 337

n = 1016

n = 60

n = 19

n = 937

Followup2003/2004

Reassessed population

Non reassessed ³

Final population

Incident ADdementia

Cognitively NC non classified

AD free cohort

N = 937

n = 133

n = 804

n = 109

n = 4

n = 695