TABLE 1.
Propensity score matched patient characteristics (N = 5750 | 5750)
| Impella (%) | IABP (%) | Standardized mean difference (matched variables) | OR 95%CIa, p-value± | |
|---|---|---|---|---|
| Age (years, SD) | 64.6 (13) | 65.4 (13) | 0.03 | 0.15 |
| Female | 31 | 31 | 0.00 | 1.00 (0.83–1.19) |
| White | 70.5 | 71.0 | NA | 0.97(0.74–1.29) |
| Hypertension | 44.4 | 45.6 | 0.02 | 0.96 (0.81–1.13) |
| Hyperlipidemia | 46.5 | 46.1 | 0.01 | 1.02 (0.86–1.20) |
| Diabetes | 39.0 | 38.0 | 0.02 | 1.04(0.88–1.23) |
| CKD | 22.8 | 24.4 | 0.04 | 0.92 (0.76–1.11) |
| CAD | 84.5 | 86.4 | 0.05 | 0.86 (0.68–1.09) |
| CHRNLUNG | 17.3 | 17.8 | 0.01 | 0.96 (0.78–1.20) |
| CHF | 45.1 | 45.1 | 0.00 | 1.00 (0.85–1.18) |
| PVD | 16.0 | 17.6 | 0.04 | 0.89 (0.72–1.11) |
| Obesity | 13.6 | 13.7 | 0.00 | 0.99 (0.78–1.26) |
| Fluid disorders | 50.1 | 49.5 | 0.01 | 1.02 (0.87–1.21) |
| Coagulopathy | 21.7 | 20.1 | 0.04 | 1.01 (0.90–1.34) |
| Blood loss | 1.4 | 1.8 | 0.04 | 0.76 (0.39–1.46) |
| STEMI | 63.5 | 63.0 | 0.01 | 1.02 (0.86–1.21) |
| AKI | 44.1 | 41.3 | NA | 1.12 (0.95–1.32) |
| Cardiac arrest | 22.1 | 22.8 | 0.02 | 0.96 (0.79–1.17) |
| PCI | 73.8 | 74.9 | 0.02 | 0.95 (0.79–1.14) |
| VT | 21.9 | 19.0 | NA | 1.20 (0.98–1.47) |
| CPR | 10.7 | 10.9 | 0.01 | 0.98 (0.75–1.28) |
| Transfusions | 8.7 | 4.6 | NA | 1.97 (1.40–2.78) |
| Respiratory failure | 52.6 | 46.1 | NA | 1.30(1.10–1.53) |
| Sepsis | 7.1 | 7.0 | NA | 1.01 (0.74–1.39) |
| Stroke | 3.0 | 2.7 | NA | 1.10 (0.67–1.80) |
| Length of stayb (days, SD) | 11.4 (12) | 10.5 (10) | NA | 0.15 |
| Death | 24.6 | 15.9 | NA | 1.73 (1.41–2.13) |
| Hospital costs (USD, SD) | 73,172.80 (68,730) | 50,756.00 (61,805) | NA | <0.01 |
Abbreviations: AKI, acute kidney injury; CAD, coronary artery disease; CHRNLUNG, chronic lung disease (Elixhauser variable); CHF, congestive heart failure; CI, confidence interval; CKD, chronic kidney disease; CPR, cardiopulmonary resuscitation; PCI, percutaneous coronary intervention; PVD, peripheral vascular disease (Elixhauser variable); STEMI, ST-elevation myocardial infarction; USD, US dollars; VT, ventricular tachycardia.
a
Based on univariate analysis derived from 2 × 2 contingency tables
±
2 tailed student’s t-test; NA, not matched by propensity score matching.
b
Length of stay evaluated only in patients discharged from hospital stay.