Research Article
Preoperative White Blood Cell Count and Risk of 30-Day Readmission after Cardiac Surgery
Table 2
Procedural characteristics and outcomes of patients with or without 30-day readmission.
| Characteristic | 30-day readmission | No | Yes | value |
| Procedural characteristics | | | | Priority | | | | Emergent | 5.3 | 6.6 | 0.534 | Urgent | 50.9 | 47.9 | | Elective | 43.9 | 45.6 | | Procedure | | | | CABG | 60.7 | 51.0 | 0.007 | Valve | 22.4 | 30.1 | | CABG/valve | 17.0 | 18.9 | | On-pump surgery | 90.3 | 95.8 | 0.004 | Nadir hematocrit <20 on bypass | 15.0 | 20.5 | 0.029 | Cardiopulmonary bypass time (min) | | | 0.393 | Time to initial extubation (min) | | | 0.951 | Intraoperative myocardial infarction | 2.4 | 2.7 | 0.725 | Return to bypass | 4.2 | 4.6 | 0.730 | Management | | | | RBC transfusions | | | | None | 67.6 | 58.7 | 0.001 | One | 8.9 | 10.0 | | Two | 10.3 | 9.3 | | Three or more | 13.2 | 22.0 | | Use of 1 or more inotropes | | | | Arrive to ICU | 43.9 | 44.0 | 0.965 | After 4 hours | 37.2 | 44.0 | 0.034 | After 48 hours | 11.3 | 15.1 | 0.080 | Adverse outcomes | | | | Low-cardiac output failure | 8.0 | 10.0 | 0.272 | Stroke | 1.1 | 1.5 | 0.525 | Mediastinitis | 0.4 | 2.7 | <0.001 | Acute kidney injury | 30.7 | 49.4 | <0.001 | Reintubation | 3.7 | 3.9 | 0.866 | Return to operating room for bleeding | 3.2 | 4.3 | 0.395 | New atrial fibrillation | 32.6 | 39.8 | 0.021 | Leg wound infection | 0.7 | 1.2 | 0.463 | Pneumonia | 1.7 | 0.8 | 0.275 |
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CABG: coronary artery bypass graft surgery; RBC: packed red blood cell transfusion; ICU: intensive care unit.
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