Table 1.

Characteristics of the study population

	Alzheimer's disease (n = 264)	Controls (n = 389)
	Mean ± SD
Age (years)	79 ± 7	73 ± 6
	n (%)
Female	172 (65%)	207 (53%)
Education
Elementary	132 (50%)	40 (10%)
High school	93 (35%)	160 (41%)
College and above	39 (15%)	189 (49%)
Cigarette smoking
Never	204 (77%)	321 (83%)
Former	42 (16%)	56 (14%)
Current	18 (7%)	12 (3%)
Alcohol consumption
Never	230 (87%)	349 (90%)
Former	24 (9%)	13 (3%)
Current	10 (4%)	27 (7%)
Type 2 diabetes	48 (18%)	51 (13%)
Hypertension	103 (39%)	205 (53%)
Hyperlipidemia	48 (18%)	115 (30%)
ApoE ε4 carriers	107 (40%)	55 (14%)

ApoE denotes Apolipoprotein E gene.

Abbreviation: SD, standard deviation.