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Table 1 Baseline Characteristics of the study population, median (IQR), or N (%), or means±SD

From: Value of the fT3/fT4 ratio and its combination with the GRACE risk score in predicting the prognosis in euthyroid patients with acute myocardial infarction undergoing percutaneous coronary intervention: a prospective cohort study

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
  1. 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