Table 1.

Patient Characteristics

Age (mean)	44.0±10.9
Age>50 yr (%)	27.7
Race (%)
White	77.5
Black	7.1
Hispanic	9.7
Asian	1.3
Native American	0.5
Others	4.0
Payer Type (%)
Medicare	4.5
Medicaid	1.8
Private	47.0
Self pay	43.2
Other	3.6
Geographic Region (%)
Northeast	29.1
Midwest	12.1
South	36.6
West	22.3
Hospital Type (%)
Teaching	56.7
Non-teaching	43.3