Table 2.
Patient and Disease Characteristics
| Patient Factors | Readmitted or Death Within 30 Days | Not Readmitted and Alive at 30 Days | P Valuea |
|---|---|---|---|
| Alive discharges (N = 1271) | 135 (10.6%) | 1136 | |
| Patient comorbidities | |||
| Age ± SD, y | 66.3 ± 14.8 | 62.3 ± 12.9 | <0.001 |
| Age ≥80 years, % | 23.0 | 10.6 | <0.001 |
| Female, % | 37.3 | 26.9 | 0.006 |
| Angina, % | 28.0 | 26.3 | 0.646 |
| Prior myocardial infarction, % | 29.8 | 23.6 | 0.082 |
| Prior coronary artery bypass surgery, % | 3.1 | 3.9 | 0.639 |
| Prior cerebrovascular accident, % | 11.2 | 5.9 | 0.011 |
| Diabetes mellitus, % | 28.0 | 20.9 | 0.042 |
| Hypertension, % | 63.4 | 59.0 | 0.288 |
| Underweight (BMI < 18.5), % | 1.9 | 1.6 | 0.772 |
| Obese (BMI >30), % | 36.7 | 33.4 | 0.411 |
| Aspirin therapy, % | 39.8 | 37.9 | 0.649 |
| Hypercholesterolemia, % | 51.4 | 51.4 | 0.114 |
| Statin therapy, % | 33.5 | 30.8 | 0.488 |
| Chest pain, % | 95.0 | 92.0 | 0.179 |
| Smoker, % | 31.7 | 36.0 | 0.280 |
| Presentation | |||
| Transfer patient | 69.6 | 78.0 | 0.017 |
| Cardiac arrest, % | 16.8 | 6.2 | <0.001 |
| Shortness of breath, % | 54.7 | 42.4 | 0.003 |
| Syncope, % | 13.7 | 6.6 | 0.001 |
| Symptom duration ± SD, min | 267 ± 474 | 252 ± 577 | 0.752 |
| Anterior ST‐elevation, % | 45.3 | 35.8 | 0.018 |
| Inferior ST‐elevation, % | 49.1 | 60.0 | 0.008 |
| Lateral ST‐elevation, % | 23.6 | 21.7 | 0.591 |
| Left bundle branch block, % | 3.1 | 2.8 | 0.820 |
| Anterior ST‐depression, % | 28.0 | 29.0 | 0.791 |
| Sinus rhythm, % | 80.8 | 88.4 | 0.006 |
| Systolic blood pressure ± SD | 118 ± 40 | 127 ± 39 | 0.005 |
| Diastolic blood pressure ± SD | 69 ± 24 | 75 ± 24 | 0.009 |
| Heart rate ± SD | 74 ± 26 | 73 ± 24 | 0.571 |
| Killip class IV, % | 12.4 | 3.3 | <0.001 |
| Primary PCI, % | 52.6 | 42.0 | 0.019 |
| Full dose lytic given, % | 21.7 | 29.4 | 0.044 |
| Half dose lytic given, % | 19.9 | 22.5 | 0.455 |
| Persistent pain, % | 50.9 | 49.4 | 0.712 |
| Persistent ST‐elevations, % | 68.3 | 65.7 | 0.511 |
| Shock, % | 22.4 | 7.3 | <0.001 |
| Intubation, % | 19.9 | 6.1 | <0.001 |
| TIMI flow pre | |||
| 0 | 47.8 | 43.0 | 0.096 |
| 1 | 11.8 | 7.7 | |
| 2 | 19.3 | 22.0 | |
| 3 | 21.1 | 27.4 | |
| Coronary disease | |||
| Left main disease >50%, % | 8.7 | 5.5 | 0.105 |
| 2‐Vessel disease >70%, % | 25.5 | 29.9 | 0.241 |
| 3‐vessel disease >70%, % | 38.5 | 23.1 | <0.001 |
| Infarcted left anterior descending, % | 42.9 | 33.0 | 0.013 |
| Infarcted left circumflex, % | 14.3 | 14.4 | 0.981 |
| Infarcted right coronary, % | 36.7 | 43.1 | 0.121 |
| Infarcted ramus, % | 0.6 | 0.6 | 0.941 |
| Infarcted left main, % | 1.9 | 0.6 | 0.070 |
| TIMI flow post | |||
| 0 | 10.6 | 13.1 | 0.001 |
| 1 | 1.9 | 0.2 | |
| 2 | 3.7 | 1.4 | |
| 3 | 83.9 | 85.4 |
Abbreviations: BMI, body mass index; PCI, percutaneous coronary intervention; SD, standard deviation; TIMI, Thrombolysis in Myocardial Infarction. TIMI Flow Pre, TIMI flow measured prior to intervention; TIMI Flow Post, TIMI flow measured after intervention.
a
Pearson χ2 or Student t test and SD.