Table 3.
Patients and Hospital Characteristics Stratified by Quartiles of Hospital IABP Usage
| Demographics | Total 181599 |
Hospital IABP Usage
|
Overall P | |||
|---|---|---|---|---|---|---|
| Quartile 1 41941 |
Quartile 2 49962 |
Quartile 3 50165 |
Quartile 4 39531 |
|||
| Admission Status | <0.001 | |||||
| Outpatient Referral | 18549 (10.2) | 5945 (14.2) | 4183 (8.4) | 4727 (9.4) | 3694 (9.3) | |
| Emergency Department | 96328 (53.0) | 21725 (51.8) | 26230 (52.5) | 25205 (50.2) | 23168 (58.6) | |
| Transfer from Acute Care Facility | 62602 (34.5) | 13298 (31.7) | 18562 (37.2) | 18949 (37.8) | 11793 (29.8) | |
| Transfer from Non-Acute Facility | 2099 (1.2) | 461 (1.1) | 560 (1.1) | 662 (1.3) | 416 (1.1) | |
| Other | 2021 (1.1) | 512 (1.2) | 427 (0.9) | 622 (1.2) | 460 (1.2) | |
| Age: Mean (SD) | 61.9 (13.1) | 61.7 (13.1) | 61.3 (13.0) | 62.3 (13.2) | 62.4 (13.1) | <0.001 |
| Female (%) | 52491 (28.9) | 12244 (29.2) | 14189 (28.4) | 14563 (29.0) | 11495 (29.1) | 0.031 |
| Race | <0.001 | |||||
| White (%) | 153097 (84.3) | 36236 (86.4) | 42781 (85.6) | 40844 (81.4) | 33236 (84.1) | |
| Black (%) | 11643 (6.4) | 2551 (6.1) | 3238 (6.5) | 3478 (6.9) | 2376 (6.0) | |
| Other (%) | 16859 (9.3) | 3154 (7.5) | 3943 (7.9) | 5843 (11.6) | 3919 (9.9) | |
| Payor | <0.001 | |||||
| Government (%) | 82549 (45.5) | 19747 (47.1) | 22430 (44.9) | 22024 (43.9) | 18348 (46.4) | |
| Commercial (%) | 56831 (31.3) | 13779 (32.9) | 15628 (31.3) | 15783 (31.5) | 11641 (29.4) | |
| HMO (%) | 22283 (12.3) | 3798 (9.1) | 5972 (12.0) | 7179 (14.3) | 5334 (13.5) | |
| Other (%) | 19936 (11.0) | 4617 (11.0) | 5932 (11.9) | 5179 (10.3) | 4208 (10.6) | |
| Cardiac Status | ||||||
| Admission Symptom Presentation | <0.001 | |||||
| No Angina (%) | 6804 (37) | 1492 (3.6) | 1541 (3.1) | 2081 (4.2) | 1690 (4.3) | |
| Atypical Chest Pain (%) | 2225 (1.2) | 469 (1.1) | 526 (1.1) | 712 (1.4) | 518 (1.3) | |
| Stable Angina (%) | 4249 (2.3) | 1057 (2.5) | 969 (1.9) | 1236 (2.5) | 987 (2.5) | |
| ACS: Unstable Angina (%) | 11874 (6.5) | 3042 (7.3) | 2936 (5.9) | 3264 (6.5) | 2632 (6.7) | |
| ACS: Non-ST Elevation MI (%) | 12257 (6.7) | 2641 (6.3) | 3024 (6.1) | 3516 (7.0) | 3076 (7.8) | |
| ACS: ST Elevation MI (%) | 144190 (79.4) | 33240 (79.3) | 40966 (82.0) | 39356 (78.5) | 30628 (77.5) | |
| Cardiogenic Shock (%) | 21259 (11.7) | 4122 (9.8) | 5479 (11.0) | 6204 (12.4) | 5454 (13.8) | <0.001 |
| Door to Balloon time: Mean (SD) | 107.6 (246.1) | 109.1 (256.5) | 108.7 (253.4) | 104.1 (238.6) | 109.1 (235.3) | 0.038 |
| CHF - Current Status (%) | 28794 (15.9) | 5897 (14.1) | 7600 (15.2) | 8595 (17.1) | 6702 (17.0) | <0.001 |
| PCI Status | <0.001 | |||||
| Elective | 20189 (11.1) | 4446 (10.6) | 5149 (10.3) | 5908 (11.8) | 4686 (11.9) | |
| Urgent | 38824 (21.4) | 9651 (23.0) | 10706 (21.4) | 10623 (21.2) | 7844 (19.8) | |
| Emergency | 120102 (66.1) | 27351 (65.2) | 33521 (67.1) | 32887 (65.6) | 26343 (66.6) | |
| Salvage | 2452 (1.4) | 485 (1.2) | 582 (1.2) | 740 (1.5) | 645 (1.6) | |
| NYHA | <0.001 | |||||
| Class I | 40485 (22.3) | 10592 (25.3) | 10137 (20.3) | 11320 (22.6) | 8436 (21.3) | |
| Class II | 16279 (9.0) | 3879 (9.2) | 4384 (8.8) | 4136 (8.2) | 3880 (9.8) | |
| Class III | 36896 (20.3) | 8955 (21.4) | 10622 (21.3) | 9656 (19.2) | 7663 (19.4) | |
| Class IV | 87939 (48.4) | 18515 (44.1) | 24819 (49.7) | 25053 (49.9) | 19552 (49.5) | |
| Ejection Fraction: Mean (SD) | 41.4 (15.2) | 41.3 (15.1) | 42.4 (15.0) | 41.2 (15.5) | 40.6 (15.2) | <0.001 |
| History and Risk Factors | ||||||
| Previous MI (>7 Days) | 42701 (23.5) | 10252 (24.4) | 11296 (22.6) | 11572 (23.1) | 9581 (24.2) | <0.001 |
| CHF - Previous History | 21127 (11.6) | 4779 (11.4) | 5128 (10.3) | 6211 (12.4) | 5009 (12.7) | <0.001 |
| Previous Valvular Surgery | 1480 (0.8) | 315 (0.8) | 306 (0.6) | 438 (0.9) | 421(1.1) | <0.001 |
| Diabetes | 46577 (25.7) | 10538 (25.1) | 12492 (25.0) | 13057 (26.0) | 10490 (26.5) | <0.001 |
| Renal Failure - Previous History | 9250 (5.1) | 1900 (4.5) | 2343 (4.7) | 2755 (5.5) | 2252 (5.7) | <0.001 |
| Renal Failure - Dialysis | 2800 (1.5) | 573 (1.4) | 670 (1.3) | 888 (1.8) | 669 (1.7) | <0.001 |
| Peripheral Vascular Disease | 16241 (8.9) | 3713 (8.9) | 4353 (8.7) | 4537 (9.0) | 3638 (9.2) | 0.055 |
| Hypertension | 116278 (64.0) | 26818 (63.9) | 31587 (63.2) | 32363 (64.5) | 25510 (64.5) | <0.001 |
| Current Use of Tobacco | 73587 (40.5) | 17648 (42.1) | 21387 (42.8) | 19178 (38.2) | 15374 (38.9) | <0.001 |
| Chronic Lung Disease | 27052 (14.9) | 6058 (14.4) | 7619 (15.2) | 7349 (14.6) | 6026 (15.2) | <0.001 |
| Dyslipidemia | 111215 (61.2) | 26555 (63.3) | 30103 (60.3) | 30584 (61.0) | 23973 (60.6) | <0.001 |
| Family History of CAD age <55 | 41704 (23.0) | 9645 (23.0) | 11577 (23.2) | 11132 (22.2) | 9350 (23.7) | <0.001 |
| Previous PCI | 39785 (21.9) | 9471 (22.6) | 10703 (21.4) | 11000 (21.9) | 8611 (21.8) | <0.001 |
| Previous CABG | 18812 (10.4) | 4415 (10.5) | 4837 (9.7) | 5278 (10.5) | 4282 (10.8) | <0.001 |
| Hospital Characteristics | ||||||
| Location | <0.001 | |||||
| Rural | 2289 (1.3) | 838 (2.0) | 315 (0.6) | 746(1.5) | 390 (1.0) | |
| Suburban | 163203 (89.9) | 39304 (93.7) | 44854 (89.8) | 44679 (89.1) | 34366 (86.9) | |
| Urban | 16107 (8.9) | 1799 (4.3) | 4793 (9.6) | 4740 (9.4) | 4775 (12.1) | |
| Profit Type | <0.001 | |||||
| Government | 24276 (13.4) | 5520 (13.2) | 7338 (14.7) | 5737 (11.4) | 5681 (14.4) | |
| Private/Community | 47866 (26.4) | 12057 (28.8) | 12196 (24.4) | 12705 (25.3) | 10908 (27.6) | |
| University | 109457 (60.3) | 24364 (58.1) | 30428 (60.9) | 31723 (63.2) | 22942 (58.0) | |
| Patient Beds: Mean (SD) | 461.9 (232.2) | 429.8 (231.8) | 457.0 (184.0) | 485.6 (257.2) | 472.0 (249.1) | <0.001 |