Table 1.
Patient and Treatment Characteristics According to Quartile of Hospital-level Early Follow-up
| Hospital Quartile 1 (n=6129) | Hospital Quartile 2 (n=6759) | Hospital Quartile 3 (n=7626) | Hospital Quartile 4 (n=5358) | p-value | |
|---|---|---|---|---|---|
| Hospital early follow-up (%) | <17.8 | 17.8–23.2 | 23.3–28.9 | >28.9 | |
| Demographics | |||||
| Age, median (IQR), y | 76.0 (70.0, 81.0) | 76.0 (70.0, 82.0) | 76.0 (70.0, 82.0) | 77.0 (71.0, 82.0) | <0.0001 |
| Weight, median (IQR), kg | 78.2 (66.7, 90.3) | 77.6 (66.2, 90.0) | 77.1 (66.2, 90.0) | 77.1 (65.8, 89.0) | 0.01 |
| Female sex (%) | 43.7 | 44.3 | 44.8 | 43.9 | 0.62 |
| Race (%) | <0.0001 | ||||
| White | 89.2 | 87.8 | 82.5 | 83.6 | |
| Black | 6.1 | 7.3 | 8.5 | 8.3 | |
| Asian | 0.4 | 0.2 | 1.3 | 0.8 | |
| Hispanic | 2.4 | 1.5 | 4.1 | 2.9 | |
| Other | 1.0 | 0.9 | 2.3 | 2.7 | |
| Medical history (%) | |||||
| Hypertension | 75.7 | 76.3 | 77.9 | 76.6 | 0.01 |
| Diabetes mellitus | 33.4 | 33.2 | 34.5 | 35.5 | 0.01 |
| Peripheral arterial disease | 13.9 | 14.2 | 14.8 | 12.7 | 0.01 |
| Current/recent smoking | 14.0 | 13.8 | 13.2 | 13.1 | 0.32 |
| Family history of CAD | 34.6 | 28.3 | 21.7 | 29.6 | <0.0001 |
| Prior MI | 28.4 | 30.0 | 31.8 | 31.6 | <0.0001 |
| Prior PCI | 23.9 | 23.5 | 22.9 | 22.6 | 0.36 |
| Prior CABG | 25.2 | 26.3 | 24.5 | 24.6 | 0.07 |
| Prior heart failure | 17.8 | 18.0 | 19.9 | 20.3 | <0.0001 |
| Chronic renal insufficiency | 14.0 | 14.9 | 15.6 | 16.2 | 0.004 |
| Presentation features | |||||
| Signs of heart failure (%) | 25.8 | 24.3 | 25.3 | 28.0 | <0.0001 |
| ECG findings (%) | <0.001 | ||||
| ST-segment depression | 25.6 | 28.7 | 28.1 | 27.6 | |
| Transient ST-segment elevation | 3.0 | 3.1 | 3.3 | 3.9 | |
| Neither | 70.5 | 67.5 | 67.6 | 67.5 | |
| Both | 0.9 | 0.7 | 1.0 | 0.9 | |
| Hematocrit, median (IQR), % | 39.6 (35.8, 43.2) | 39.8 (36.0, 43.2) | 39.5 (35.6, 43.0) | 39.3 (35.5, 42.8) | <0.001 |
| Transfer-in status (%) | 31.0 | 31.1 | 24.1 | 15.3 | <0.0001 |
| In-hospital treatment (%) | |||||
| Cardiac catheterization | 78.0 | 77.6 | 75.0 | 73.8 | <0.0001 |
| PCI | 46.1 | 45.2 | 44 | 43.6 | 0.03 |
| CABG | 12.1 | 10.8 | 10 | 9.8 | 0.0001 |
| LVEF assessment | 86.4 | 86.8 | 85.8 | 83.4 | <0.0001 |
| Discharge treatment (%) | |||||
| Medications prescribed | |||||
| Aspirin | 94.8 | 95.5 | 95.5 | 94.3 | 0.001 |
| Clopidogrel | 72.4 | 74.5 | 71.3 | 73.8 | <0.0001 |
| Beta-blocker | 91.7 | 93.6 | 92.7 | 91.9 | 0.0001 |
| Statin | 78.6 | 79.4 | 81.5 | 78.4 | <0.0001 |
| ACEI/ARB | 67.5 | 66.3 | 66.2 | 64.9 | 0.08 |
| Cardiac rehabilitation referral | 67.7 | 66.0 | 62.7 | 61.4 | <0.0001 |
| Smoking cessation counseling | 79.4 | 79.9 | 80.0 | 80.7 | 0.92 |
| Diet modification counseling | 86.9 | 81.5 | 80.6 | 85.9 | <0.0001 |
ACEI indicates angiotensin-converting enzyme inhibitor; ARB, angiotensin receptor blocker; CABG, coronary artery bypass graft surgery; CAD, coronary artery disease; ECG, electrocardiogram; IQR, interquartile range; LVEF, left ventricular ejection fraction; MI, myocardial infarction; PCI, percutaneous coronary intervention