Table 2. Hospital Characteristics After Stratification by Use of Intravascular Microaxial Left Ventricular Assist Device (LVAD).
| Characteristic | No use of intravascular microaxial LVAD (n = 521) | Any (at least 1) use of intravascular microaxial LVAD | P value (no vs any use) | |||
|---|---|---|---|---|---|---|
| Tertile 1 (n = 125) | Tertile 2 (n = 135) | Tertile 3 (n = 147) | P value (among tertiles) | |||
| Patients with AMI complicated by cardiogenic shock who underwent PCI and received an intravascular microaxial LVAD at each hospital, % | NA | <7 | 7 to <15 | ≥15 | NA | NA |
| Beds, No. (%) | .50 | <.001 | ||||
| <200 | 179 (34.4) | 16 (12.8) | 23 (17.0) | 31 (21.1) | ||
| 200-399 | 205 (39.3) | 54 (43.2) | 59 (43.7) | 62 (42.2) | ||
| 400-599 | 89 (17.1) | 30 (24.0) | 24 (17.8) | 31 (21.1) | ||
| ≥600 | 48 (9.2) | 25 (20.0) | 29 (21.5) | 23 (15.6) | ||
| Location | .83 | .003 | ||||
| Rural | 105 (20.2) | 18 (14.4) | 21 (15.6) | 21 (14.3) | ||
| Suburban | 192 (36.9) | 38 (30.4) | 38 (28.1) | 51 (34.7) | ||
| Urban | 224 (43.0) | 69 (55.2) | 76 (56.3) | 75 (51.0) | ||
| Type | .76 | .17 | ||||
| Government | 9 (1.7) | 1 (0.8) | 3 (2.2) | 2 (1.4) | ||
| Private | 474 (91.0) | 108 (86.4) | 120 (88.9) | 129 (87.8) | ||
| University | 38 (7.3) | 16 (12.8) | 12 (8.9) | 16 (10.9) | ||
| Teaching program | 184 (35.3) | 57 (45.6) | 69 (51.1) | 60 (40.8) | .22 | .001 |
| Annual PCI volume, mean (SD) | 442.1 (498.1) | 821.3 (562.7) | 753.4 (666.7) | 662.8 (471.2) | .03 | <.001 |
Abbreviations: AMI, acute myocardial infarction; NA, not applicable; PCI, percutaneous coronary intervention.