Table 1.

Study Population Baseline Characteristics

	MRI (n=310,768)	no MRI (n=314,074)	All Subjects (n=624,842)
Demographics
Age mean(sd)	70 (14)	76 (13)	73 (14)
Female	52%	57%	54%
Race/Ethnicity
White	60%	61%	61%
Black	7%	7%	7%
Hispanic	14%	12%	13%
Insurance
Medicare	64%	75%	70%
Medicaid	8%	6%	7%
Private Insurance	22%	14%	18%
Other Insurance	6%	4%	5%
Comorbidities
Hypertension	72%	67%	69%
Hyperlipidemia	32%	19%	25%
Diabetes	30%	28%	29%
Coronary Artery Disease	21%	27%	24%
Atrial Fibrillation	16%	27%	21%
Modified Charlson, mean (sd)	3.8 (2)	4.5 (1.9)	4.1 (1.9)