Following are predispositions to Alzheimer\'s disease except -
Down's syndrome
Head trauma
Smoking
Low education group
Risk factors for Alzheimer's disease:- Old age, female sex, positive family history, head trauma, low educational status, depression, metabolic (diabetes, hypercholesterolemia, elevated homocysteine), hypertension, CVA (stroke), Heavy metals (mercury, aluminium), genetic factors, down's syndrome.