Table 1.

Clinical characteristics.

	Normal cardiac output	Low cardiac output
Age, years	72.4 ± 6.8	72.8 ± 7.9
Education level, years	13.9 ± 2.1	13.4 ± 2.2
Sex, % female	30	46
Mini-mental state exam	28.8 ± 1.1	29.2 ± 1.3
Dementia rating scale	138.6 ± 4.5	137.6 ± 4.4
Cardiac output, L/min*	5.2 ± 1.5	3.4 ± 0.5
Family history of heart disease, %	64	50
Hypertension, %	83	78
Hypercholesterolemia, %	50	63
Diabetes mellitus, %	18	0
Atrial fibrillation, %	17	11
Prior coronary artery bypass, %	48	33
Heart failure, %	11	11
Prior myocardial infarction, %	48	22

Note: Data presented as mean ± standard deviation or as percentage; vascular risk factors and prevalent vascular disease data are based on self report and confirmed via medical records when possible;

^*Significant between-group difference, p < 0.05.