Table 1.
Baseline Characteristics of the study population, median (IQR), or N (%), or means±SD
| Variable | All Patients (n = 953) | Survival Group (n = 915) | Death Group (n = 38) | p value |
|---|---|---|---|---|
| Demographics | ||||
| Age, yrs | 61.0 ± 11.6 | 60.8 ± 11.6 | 67.6 ± 10.6 | <0.001 |
| Female | 246 (25.8) | 231 (25.2) | 15 (39.5) | 0.050 |
| Medical history | ||||
| History of Diabetes Mellitus | 281 (29.5) | 269 (29.4) | 12 (31.6) | 0.773 |
| History of Hypertension | 533 (55.9) | 502 (54.9) | 31 (81.6) | 0.001 |
| History of MI | 107 (11.2) | 102 (11.1) | 5 (13.2) | 0.701 |
| Prior PCI | 90 (9.4) | 89 (9.7) | 1 (2.6) | 0.143 |
| Presentation | ||||
| Killip class III/IV on admission | 19 (2.0) | 11 (1.2) | 8 (30.0) | <0.001 |
| SBP on admission, mm Hg | 134.4 ± 22.7 | 134.3 ± 22.6 | 138.5 ± 26.2 | 0.259 |
| Heart rate on admission, bpm | 76.6 ± 14.7 | 76.2 ± 14.3 | 86.4 ± 20.4 | <0.001 |
| GRACE score | 127.7 ± 32.2 | 126.5 ± 31.6 | 158.0 ± 32.7 | <0.001 |
| Diagnosis on admission | 0.573 | |||
| STEMI | 519 (54.5) | 500 (54.6) | 19 (50.0) | |
| NSTEMI | 434 (45.5) | 415 (45.4) | 19 (50.0) | |
| Troponin-I on admission, ng/mL | 4.06 (0.38, 31.77) | 4.04 (0.37, 32.07) | 5.31 (0.67, 25.01) | 0.870 |
| Creatinine on admission, umol/l | 72 (61, 86) | 72 (61, 86) | 81 (62, 107) | 0.090 |
| Albumin on admission, g/L | 39.4 ± 3.6 | 39.5 ± 3.5 | 37.5 ± 4.2 | 0.001 |
| TSH, uIU/mL | 1.546 ± 0.961 | 1.549 ± 0.965 | 1.485 ± 0.853 | 0.687 |
| fT3, pmol/L | 3.902 ± 0.588 | 3.913 ± 0.581 | 3.659 ± 0.694 | 0.009 |
| fT4, pmol/L | 13.11 ± 1.84 | 13.08 ± 1.82 | 14.02 ± 2.20 | 0.002 |
| fT3/ fT4 ratio | 0.302 ± 0.055 | 0.304 ± 0.054 | 0.262 ± 0.058 | <0.001 |
| Percutaneous coronary intervention details | ||||
| Left main disease | 75 (7.9) | 71 (7.8) | 4 (10.5) | 0.535 |
| Three-vessel disease | 242 (25.4) | 232 (25.4) | 10 (26.3) | 0.894 |
| TIMI flow grade 0/1 on arrival | 741 (77.8) | 714 (78.0) | 27 (71.1) | 0.311 |
| TIMI flow grade 3 post PCI | 947 (99.4) | 910 (99.5) | 37 (97.4) | 0.111 |
| Medical treatment at discharge | ||||
| Aspirin | 950 (99.7) | 912 (99.7) | 38 (100) | 0.724 |
| Clopidogrel | 865 (90.8) | 830 (90.7) | 35 (92.1) | 0.771 |
| Ticagrelor | 75 (7.9) | 72 (7.9) | 3 (7.9) | 0.995 |
| Statin | 943 (99.0) | 905 (98.9) | 38 (100) | 0.517 |
| ACEI/ARB | 510 (53.5) | 490 (53.6) | 20 (52.6) | 0.911 |
| Beta-blockers | 481 (50.5) | 461 (50.4) | 20 (52.6) | 0.786 |
MI myocardial infarction, PCI percutaneous coronary intervention, SBP systolic blood pressure, bpm beats per minute, STEMI ST-segment elevation myocardial infarction, NSTEMI non-ST-segment elevation myocardial infarction, TSH thyrotropin, fT3 free triiodothyronine, fT4 free thyroxine, ACEI/ARB Angiotensin-converting enzyme inhibitors / Angiotensin receptor blockers