Table 1 Patient Visit Characteristics
| Â | Total | |
|---|---|---|
N | Percent | |
Total Visits | 29,850,475 | 100% |
Age | ||
 Median | 48 |  |
 Mean | 45.0 |  |
 Standard deviation | 27.50 |  |
Race | ||
 Caucasian | 19,314,454 | 64.7% |
 African-American | 4,052,601 | 13.6% |
 Other | 6,483,420 | 21.7% |
Gender | ||
 Female | 17,831,769 | 59.7% |
 Male | 12,015,263 | 40.3% |
 Unknown | 3443 | 0.0% |
Insurance | ||
 Commercial | 1,681,308 | 5.6% |
 Medicare | 10,010,108 | 33.5% |
 Medicaid | 6,968,569 | 23.3% |
 Managed Care | 8,043,140 | 26.9% |
 Other | 3,147,350 | 10.5% |
Admission Type | ||
 Emergency | 13,780,883 | 46.2% |
 Urgent | 4,466,926 | 15.0% |
 Elective | 7,507,444 | 25.2% |
 Other/Unknown | 4,095,222 | 13.7% |
CT Scan | 2,195,374 | 7.4% |
Contrast Used | ||
 Iodinated | 2,290,183 | 7.7% |
 Non-Iodinated | 463,956 | 1.6% |
 Both | 73,839 | 0.2% |
 Unknown | 3,258,046 | 10.9% |
 None | 23,764,451 | 79.6% |