Table 1 Study population demographic characteristics (n = 82,784)
| Age (mean) | 55.7 years |
| Age (% distribution) | |
| 18-24 years | 4.1% |
| 25-44 years | 21.6% |
| 45-64 years | 44.2% |
| 65-84 years | 27.5% |
| 85+ years | 2.6% |
| Gender | |
| Female | 47.5% |
| Male | 52.5% |
| Race | |
| White | 77.4% |
| African American | 18.8% |
| Asian | 0.6% |
| Other | 1.4% |
| Not reported | 1.8% |
| Ethnicity | |
| Hispanic | 0.8% |
| Non-Hispanic | 85.7% |
| Not reported | 13.5% |
| Insurance type | |
| Commercial | 27.9% |
| Medicare | 29.0% |
| Medicaid | 27.8% |
| Other | 39.1% |
| Year of discharge | |
| 2006 | 17.6% |
| 2007 | 25.0% |
| 2008 | 28.5% |
| 2009 | 27.9% |