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Table 2 Baseline characteristics of in-hospital mortality study population (n = 854)

From: Machine learning to predict no reflow and in-hospital mortality in patients with ST-segment elevation myocardial infarction that underwent primary percutaneous coronary intervention

Variable Better discharge (n = 807) In-hospital mortality (n = 47) p-value
Age (years) 60.09 (13.20) 69.83 (12.72)  < 0.001
Male (n (%)) 674 (83.5) 28 (59.6)  < 0.001
Hypertension (n (%)) 362 (44.9) 21 (44.7) 0.981
Diabetes (n (%)) 122 (15.1) 14 (29.8) 0.008
Smoke (n (%)) 394 (48.8) 17 (36.2) 0.091
Angina pectoris (n (%)) 43 (5.3) 5 (10.6) 0.124
Previous PCI (n (%)) 21 (2.6) 3 (6.4) 0.284
Anterior wall MI (n (%)) 412(51.1) 27(57.4) 0.394
Cardiac troponin I (normalized) 0.47 (0.33) 0.76 (0.32)  < 0.001
Creatine kinase-MB (normalized) 0.14 (0.13) 0.30 (0.24)  < 0.001
hs-CRP (normalized) 0.33 (0.33) 0.73 (0.35)  < 0.001
Hemoglobin (g/L) 137.73 (19.16) 128.38 (20.53) 0.001
WBC count (109/L) 11.47 (3.82) 13.95 (5.00)  < 0.001
Creatinine (μmol/L) 89.20 (42.11) 118.37 (56.25)  < 0.001
Uric Acid (μmol/L) 382.15 (116.94) 486.27 (141.94)  < 0.001
Albumin (g/L) 38.88 (4.28) 35.30 (5.50)  < 0.001
Glucose (mmol/L) 7.26 (3.35) 8.59 (3.68) 0.009
LDL-C (mmol/L) 3.27 (1.04) 3.18 (1.12) 0.59
HDL-C (mmol/L) 1.19 (0.43) 1.18 (0.33) 0.92
Triglyceride (mmol/L) 1.66 (1.17) 1.38 (0.63) 0.111
Total cholesterol (mmol/L) 5.01 (1.23) 4.84 (1.44) 0.372
Fibrinogen (g/L) 3.63 (1.07) 3.94 (1.55) 0.061
Shock (n (%)) 13 (1.6) 7 (14.9)  < 0.001
Malignant arrhythmia (n (%)) 95 (11.8) 13 (27.7) 0.001
Killip class (n (%))
 I 663 (82.2) 11 (23.4)  < 0.001
 II 89 (11.0) 9 (19.1) 0.090
 III 14 (1.7) 4 (8.5) 0.014
 IV 41 (5.1) 23 (48.9)  < 0.001
LVEF (%) 58.05 (9.02) 48.88 (10.50)  < 0.001
Total ischemia time (h) 4.94 (3.76) 6.42 (4.81) 0.01
SO-to-FMC (m) 163.53 (178.73) 269.81 (287.02)  < 0.001
Door-to-balloon (m) 85.49 (50.01) 94.98 (47.24) 0.205
Baseline TIMI flow (n (%))
 0 628 (77.8) 43 (91.5) 0.026
 1 40 (5.0) 3 (6.4) 0.927
 2 78 (9.7) 0 (0.0) 0.017
 3 61 (7.6) 1 (2.1) 0.269
Criminal blood vessels (n (%))
 LAD 455(56.4) 25 (53.2) 0.668
 LCX 60 (7.4) 4 (8.5) 1.0
 RCA 290 (35.9) 14 (29.8) 0.392
 LM 2 (0.2) 4 (8.5)  < 0.001
Double or multiple lesions (n (%)) 538 (66.7) 41 (85.4) 0.007
Post dilatation (n (%)) 480 (59.5) 22 (46.8) 0.086
Thrombus aspiration (n (%)) 104 (12.9) 9 (19.1) 0.218
Stent diameter (mm) 3.14 (0.43) 3.03 (0.36) 0.066
Stent length (mm) 34.39 (17.30) 42.29 (20.86) 0.003
NR (n (%)) 83(10.3) 16(34.0)  < 0.001
  1. hs-CRP high-sensitivity C-reactive protein, HDL-C high-density lipoprotein cholesterol, LAD left anterior descending coronary artery, LCX left coronary circumflexus artery, LDL-C low-density lipoprotein cholesterol, LM left main coronary artery, LVEF left ventricular ejection fraction, MI myocardial infarction, PCI Percutaneous Transluminal Coronary Intervention, RCA right coronary artery, SO-to-FMC symptom-onset to-first medical contact, TIMI thrombolysis and thrombin inhibition in myocardial infarction