Table 1. Baseline characteristics according to troponin level elevation status.
| Characteristic | All (n=363) | Negative troponin level elevation (n=175) | Positive troponin level elevation (n=188) | P value |
|---|---|---|---|---|
| Age (years) | 72.51±12.90 | 71.75±12.71 | 73.21±13.06 | 0.201 |
| Male (percentage of patients, %) | 135 (37.19) | 54 (30.9) | 81 (43.1) | 0.022 |
| BMI (kg/m2) | 31.42±8.83 | 32.5±9.79 | 30.23±7.64 | 0.140 |
| Race (percentage of patients, %) | ||||
| African American | 84 (23.14%) | 29 (16.57%) | 55 (29.26%) | 0.004 |
| White | 165 (45.45%) | 83 (47.43%) | 82 (43.62%) | 0.452 |
| Other | 114 (31.40%) | 63 (36%) | 51 (27.13%) | 0.069 |
| Ejection fraction (%) | 57.96±6.08 | 58.97±5.90 | 57.18±5.86 | 0.001 |
| Medical conditions (percentage of patients, %) | ||||
| Atrial fibrillation | 110 (30.30%) | 55 (31.4%) | 55 (29.3%) | 0.737 |
| Stroke | 51 (14.05%) | 18 (10.3%) | 33 (17.6%) | 0.066 |
| Coronary artery disease | 126 (34.71%) | 57 (32.6%) | 69 (36.7%) | 0.474 |
| Prior coronary bypass | 61 (16.80%) | 31 (17.7%) | 30 (16%) | 0.759 |
| Prior percutaneous intervention | 81 (22.31%) | 37 (21.1%) | 44 (23.4%) | 0.696 |
| Prior myocardial infarction | 62 (17.08%) | 27 (15.4%) | 35 (18.7%) | 0.490 |
| Systemic Hypertension | 317 (87.33%) | 150 (85.7%) | 167 (88.8%) | 0.463 |
| Diabetes mellitus | 190 (52.34%) | 90 (51.4%) | 100 (53.2%) | 0.817 |
| Anemia | 242 (66.67%) | 120 (68.6%) | 122 (64.9%) | 0.458 |
| Smoker | 100 (27.55%) | 36 (20.6%) | 64 (34%) | 0.006 |
| Laboratory test results | ||||
| Serum creatinine (mg\dL) | 1.38±0.75 | 1.30±0.70 | 1.45±0.78 | 0.007 |
| GFR (mL/min/1.73 m2) | 59.87±29.76 | 62.7±31.57 | 57.23±27.79 | 0.118 |
| GFR < 60 mL/min/1.73 m2 | 199 (54.8%) | 93 (53.1%) | 106 (56.4) | 0.536 |
| Blood sugar (mg/dL) | 148.66±72.31 | 146.57±72.03 | 150.62±72.71 | 0.335 |
| HDL (mg/dL) | 40 [31.25–49] | 44 [34–50] | 38 [31–48] | 0.058 |
| LDL (mg/dL) | 83 [64.5–110.25] | 87 [60–112] | 80 [68–106.75] | 0.598 |
| Hemoglobin (g/dL) | 11.50±1.94 | 11.29±1.86 | 11.69±2.00 | 0.142 |
| WBC (thousand cells/mcL) | 8.47±3.15 | 8.28±3.13 | 8.66±3.16 | 0.146 |
| Peak troponin I (ng/mL) | 0.077±0.11 | 0.01819±0.01126 | 0.133±0.137 | <0.0001 |
| BNP (pg/mL) | 666.13±783.60 | 478.65±465.07 | 820.33±950.23 | <0.0001 |
| Length of stay (days) | 5 [3–8] | 4 [3–7] | 5 [3–8] | 0.101 |
| Number of readmissions | 1 [0–3] | 1 [0–3] | 1 [0–3] | 0.286 |
| Medications on discharge | ||||
| Beta blockers | 257 (70.80%) | 133 (76.00%) | 124 (65.96%) | 0.053 |
| ACEi or ARB | 187 (51.52%) | 85 (48.57%) | 102 (54.26%) | 0.234 |
BMI, body mass index; HDL, high-density lipoprotein; LDL, low-density-lipoprotein; WBC, white blood cell; BNP, B-type natriuretic peptide level; ACEi, angiotensin converting enzyme inhibitor; ARB, angiotensin receptor blocker; GFR, glomerular filtration rate.