Table 1.

Demographic data. Subjects were matched on age, sex, education, apolipoprotein E epsilon 4 carrier status, and race. To quantify cardiovascular risk factors, body mass index was calculated for each subject and subjects were asked to report how often they exercise, their history of heart disease, sleep apnea, and diabetes, if they were currently smoking, and if they had ever smoked regularly (^*p < 0.05)

	Family History (n = 34)	No Family History (n = 23)	Significance
Age±SD	53.1±6 years	52.8±6 years	p = 0.87
Age of Onset of Parental Symptoms	70.5±9 years	N/A	N/A
Sex	80% female	60% female	p = 0.09
ApoE4 carrier	62%	22%	p = 0.002*
Education±SD	16.4±3 years	18.3±4 years	p = 0.054
Race	6% non-white	18% non-white	p = 0.14
Exercise (out of 4)±SD	3.5±0.9	3.2±1	p = 0.23
Body mass index±SD	28±5	27±6	p = 0.50
History of heart disease	0	0	—
History of sleep apnea	6%	9%	p = 0.63
Diabetes	3%	0	p = 0.43
Recent smoking	9%	9%	p = 0.95
Lifetime smoking	26%	27%	p = 0.90