Table 1.
Baseline Characteristics Among Fee-For-Service Medicare Beneficiaries with a CICU Stay Between 2003 and 2013
| 2003 | 2005 | 2007 | 2009 | 2011 | 2013 | |
|---|---|---|---|---|---|---|
| Number of CICU Hospitalizations | 367587 | 354585 | 333314 | 290820 | 276155 | 237524 |
| No. of CICU per 1000 FFS Hospitalizations (%) | 93.7 | 89.2 | 88.4 | 81.2 | 80.0 | 74.3 |
| Age (mean) | 77.1 | 77.2 | 77.4 | 77.5 | 77.7 | 77.6 |
| 65–74 | 39.5 | 39.2 | 38.8 | 39.3 | 39.0 | 39.9 |
| 75–84 | 42.7 | 42.0 | 40.7 | 38.6 | 37.8 | 36.6 |
| 85–94 | 16.6 | 17.5 | 19.0 | 20.3 | 21.3 | 21.5 |
| 95+ | 1.2 | 1.3 | 1.5 | 1.7 | 1.9 | 2.1 |
| Sex | ||||||
| Male | 50.0 | 50.2 | 50.1 | 50.3 | 49.6 | 50.8 |
| Female | 50.0 | 49.8 | 49.9 | 49.7 | 50.5 | 49.2 |
| Race | ||||||
| White | 87.0 | 86.3 | 86.2 | 85.3 | 84.8 | 84.6 |
| Black | 8.3 | 8.5 | 8.8 | 9.4 | 9.7 | 9.7 |
| Other | 4.7 | 5.1 | 5.0 | 5.3 | 5.5 | 5.7 |
| Elixhauser Comorbidities | ||||||
| 0–1 | 37.2 | 32.7 | 27.1 | 22.8 | 18.8 | 18.5 |
| 2 | 29.9 | 30.0 | 29.7 | 28.9 | 26.4 | 27.0 |
| ≥3 | 32.9 | 37.4 | 43.2 | 48.3 | 54.8 | 54.6 |
| Hypertension | 54.5 | 56.2 | 54.8 | 57.5 | 60.5 | 56.8 |
| Diabetes Mellitus | 24.7 | 24.2 | 23.4 | 22.9 | 24.9 | 24.5 |
| Obesity | 3.0 | 3.3 | 3.5 | 4.4 | 4.6 | 5.2 |
| Congestive Heart Failure | 13.9 | 15.8 | 19.5 | 29.9 | 32.7 | 34.4 |
| Valvular Heart Disease | 5.0 | 5.7 | 7.7 | 10.1 | 10.2 | 9.8 |
| Pulmonary Vascular Disease | 1.2 | 1.4 | 2.4 | 5.2 | 6.3 | 7.1 |
| Peripheral Vascular Disease | 9.0 | 9.0 | 8.7 | 9.0 | 9.2 | 8.3 |
| Chronic Pulmonary Disease | 24.4 | 26.2 | 25.0 | 20.0 | 20.9 | 20.3 |
| Renal Failure | 7.1 | 10.8 | 18.3 | 16.6 | 19.8 | 19.6 |
| Malignancy | 4.2 | 4.4 | 4.9 | 5.3 | 5.7 | 5.7 |
p value < 0.001 for all comparisons. All values are reported as percentages unless otherwise noted.
Abbreviations: FFS = Fee-For-Service Medicare beneficiary