Table 2 Clinical characteristics and biochemical variables of all STEMI patients before and after PSM

Clinical characteristics

 SBP (mmHg)

120.27 ± 20.53

103.77 ± 26.64

3.456

 < 0.001^*

121.86 ± 22.91

103.77 (26.64)

3.360

 < 0.001^*

 DBP (mmHg)

73.54 ± 12.87

64.88 ± 16.32

3.365

 < 0.001^*

72.86 ± 12.67

64.88 ± 16.32

3.477

 < 0.001^*

 HR (bpm)

76.82 ± 15.31

88.42 ± 22.69

3.307

 < 0.001^*

79.54 ± 17.50

88.42 ± 22.69

3.394

 < 0.001^*

 RR (bpm)

18.54 ± 3.04

19.57 ± 3.78

3.328

 < 0.001^*

18.88 ± 3.09

19.57 ± 3.78

1.655

0.099

 Killip III&IV

63 (3.5%)

52 (37.7%)

2154.697

 < 0.001^*

11 (8.0%)

52 (37.7%)

359.095

 < 0.001^*

 Arrhythmia

65 (3.6%)

28 (20.3%)

2149.143

 < 0.001^*

6 (4.3%)

28 (20.3%)

353.539

 < 0.001^*

 IABP

253 (14.0%)

83 (60.1%)

2141.750

 < 0.001^*

24 (17.4%)

83 (60.1%)

353.625

 < 0.001^*

 Ventilator

32 (1.8%)

34 (24.6%)

2149.143

 < 0.001^*

7 (5.1%)

34 (24.6%)

353.711

 < 0.001^*

Biochemical variables

 WBC (× 10⁹/L)

9.63 ± 3.39

11.95 ± 4.59

3.498

 < 0.001^*

9.96 ± 3.90

11.95 ± 4.59

3.377

 < 0.001^*

 HGB (g/L)

136.95 ± 17.19

138.46 ± 18.91

0.991

0.322

132.02 ± 19.47

138.46 ± 18.91

2.769

0.006^*

 PLT (× 10⁹/L)

208.65 ± 60.17

208.08 ± 57.03

0.108

0.914

201.89 ± 51.95

208.08 ± 57.03

0.942

0.347

 ALT (U/L)

53.75 ± 127.33

143.15 ± 517.96

3.446

 < 0.001^*

59.39 ± 147.29

143.15 ± 517.96

1.819

0.070

 ALB (g/L)

38.90 ± 4.17

37.60 ± 4.72

3.296

0.001^*

37.61 ± 4.58

37.97 ± 5.66

0.575

0.566

 AST (U/L)

141.88 ± 227.76

240.94 ± 522.43

3.365

 < 0.001^*

144.69 ± 283.99

240.94 ± 522.43

1.896

0.059

 Cr (μmo1/L)

85.06 ± 40.97

101.55 ± 60.88

3.985

 < 0.001^*

103.84 ± 49.17

101.55 ± 60.88

0.343

0.732

 Glu (mmol/L)

7.70 ± 3.03

9.03 ± 3.44

3.328

 < 0.001^*

7.21 ± 2.91

9.03 ± 3.44

3.370

 < 0.001^*

 HbA1c (%)

6.54 ± 1.52

6.58 ± 1.50

0.331

0.741

6.61 ± 1.50

6.58 ± 1.50

0.170

0.865

 SHR

1.00 ± 0.30

1.18 ± 0.43

3.399

 < 0.001^*

0.92 ± 0.28

1.18 ± 0.43

3.394

 < 0.001^*

 TG (mmol/L)

1.75 ± 1.13

1.45 ± 1.15

2.971

0.003^*

1.62 ± 0.95

1.45 ± 1.15

1.296

0.196

 TC (mmol/L)

4.50 ± 1.04

4.33 ± 1.20

1.752

0.080

4.36 ± 1.02

4.33 ± 1.20

0.192

0.848

 HDL-C (mmol/L)

1.01 ± 0.28

1.03 ± 0.30

0.754

0.451

0.97 ± 0.26

1.03 ± 0.30

1.586

0.114

 LDL-C (mmol/L)

2.83 ± 0.86

2.70 ± 0.95

1.707

0.088

2.76 ± 0.82

2.70 ± 0.95

0.553

0.581

 CRP (mg/L)

11.87 ± 11.54

17.72 ± 13.77

3.498

 < 0.001^*

13.73 ± 12.23

17.72 ± 13.77

2.401

0.017^*

 BNP (ng/L)

760.38 ± 1584.71

1051.89 ± 2181.27

1.101

0.271

883.94 ± 1342.41

1051.89 ± 2181.27

0.505

0.614

 cTnI (ng/ml)

36.97 ± 82.01

45.75 ± 93.43

1.193

0.233

38.06 ± 72.39

45.75 ± 93.43

0.758

0.449

 CK (U/L)

1097.85 ± 1518.40

1581.33 ± 2547.54

3.296

0.001^*

980.20 ± 1417.10

1581.33 ± 2547.54

2.424

0.016^*

 LDH (U/L)

448.59 ± 404.61

537.39 ± 563.50

2.411

0.016^*

456.44 ± 538.40

537.39 ± 563.50

1.221

0.223

 K (mmol/L)

4.06 ± 0.46

4.08 ± 0.52

0.711

0.477

4.06 ± 0.43

4.08 ± 0.52

0.417

0.677

 LVEDD (mm)

49.78 ± 5.88

50.34 ± 7.68

1.011

0.312

50.30 ± 5.70

50.34 ± 7.68

0.051

0.959

 LVEF (%)

54.45 ± 12.9

47.98 ± 11.29

3.403

 < 0.001^*

52.27 ± 11.71

47.98 ± 11.29

2.994

0.003^*