Table 2.
Clinical and Procedural Characteristics
| Variable | No 30-Day Readmission (N=14039) | 30-Day Readmission (N=1459) | P-value |
|---|---|---|---|
| Clinical Characteristics | |||
| Unstable Angina, No. (%) | 8014 (57%) | 864 (59%) | 0.19 |
| MI Type (STEMI/NSTEMI), No. (%) | 0.003 | ||
| No MI | 9465 (67%) | 918 (63%) | |
| STEMI | 2399 (17%) | 276 (19%) | |
| NSTEMI | 2175 (15%) | 265 (18%) | |
| Most recent MI, No. (%) | <0.001 | ||
| <24 hours | 2498 (18%) | 330 (23%) | |
| 1–7 days | 2076 (15%) | 211 (15%) | |
| >7 days | 3322 (24%) | 344 (24%) | |
| Never | 5918 (43%) | 556 (39%) | |
| Multivessel Disease, No. (%) | 8966 (68%) | 970 (70%) | 0.082 |
| Body Mass Index (BMI) (kg/m2) | 29.7 ± 5.7 | 29.4 ± 6.1 | 0.033 |
| CHF at presentation, No. (%) | 1427 (11%) | 254 (18%) | <0.001 |
| Diabetes, No. (%) | 3555 (25%) | 390 (27%) | 0.23 |
| Hyperlipidemia, No. (%) | 10404 (81%) | 1042 (78%) | 0.012 |
| Hypertension, No. (%) | 9864 (73%) | 1084 (77%) | 0.004 |
| Moderate/Severe Renal Disease, No. (%) | 447 (3%) | 88 (6%) | <0.001 |
| CVA/TIA, No. (%) | 1573 (11%) | 237 (17%) | <0.001 |
| Peripheral Vascular Disease, No. (%) | 1451 (11%) | 210 (15%) | <0.001 |
| COPD, No. (%) | 1489 (11%) | 237 (17%) | <0.001 |
| Peptic Ulcer Disease, No. (%) | 814 (6%) | 129 (9%) | <0.001 |
| Tumor/Lymphoma/Leukemia, No. (%) | 1687 (12%) | 220 (15%) | <0.001 |
| Metastatic Cancer, No. (%) | 107 (1%) | 27 (2%) | <0.001 |
| Pre-procedural shock, No. (%) | 379 (3%) | 77 (5%) | <0.001 |
| LVEF measure, No. (%) | <0.001 | ||
| >40% | 6511 (46%) | 586 (40%) | |
| NA | 6131 (44%) | 684 (47%) | |
| <=40% | 1397 (10%) | 189 (13%) | |
| Procedural Characteristics | |||
| Urgency of PCI, No. (%) | <0.001 | ||
| Elective | 4887 (35%) | 390 (27%) | |
| Urgent | 6581 (47%) | 714 (49%) | |
| Emergency | 2567 (18%) | 355 (24%) | |
| Drug-Eluting Stents, No. (%) | 5104 (36%) | 426 (29%) | <0.001 |
| IABP Use, No. (%) | 218 (2%) | 41 (3%) | <0.001 |
| Procedural success, No. (%) | 13285 (95%) | 1327 (91%) | <0.001 |
| In-Hospital MI, No. (%) | 562 (4%) | 86 (6%) | <0.001 |
| In-Hospital MI/CABG/TVR, No. (%) | 694 (5%) | 113 (8%) | <0.001 |
| Blood Transfusion, No. (%) | 597 (4%) | 126 (9%) | <0.001 |
| GI Bleed, No. (%) | 108 (1%) | 24 (2%) | <0.001 |
| Renal Failure Post-PCI, No. (%) | 98 (1%) | 26 (2%) | <0.001 |
| Length of Stay (Days), Median (Q1, Q3) | 1.0 (1.0, 3.0) | 2.0 (1.0, 4.0) | 0.004 |
MI – Myocardial Infarction, STEMI-ST Elevation Myocardial Infarction, NSTEMI- Non-ST Elevation Myocardial Infarction, CHF – Congestive Heart Failure, CVA/TIA – Cerebrovascular Accident / Transient Ischemic Attack, COPD – Chronic Obstructive Pulmonary Disease, LVEF – Left Ventricular Ejection Fraction, PCI – Percutaneous Coronary Intervention, IABP – Intra-Aortic Balloon Pump, CABG – Coronary Artery Bypass Graft, TVR – Target Vessel Revascularization