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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