Table 1 Comparison of variables between groups divided according to the median of calprotectin

Age (y)

63 ± 10

65 ± 12

0.228

Male, n (%)

54 (65.1)

70 (76.1)

0.109

Smoking, n (%)

18 (21.7)

23 (25.0)

0.605

Hypertension, n (%)

36 (43.4)

53 (57.6)

0.060

Diabetes mellitus, n (%)

12 (14.5)

28 (30.4)

0.012

Hypercholesterolemia, n (%)

24 (28.9)

35 (37.6)

0.221

STEMI, n (%)

15 (18.1)

58 (63.0)

<0.001

Body mass index (kg/m²)

26.4 ± 2.4

27.3 ± 2.6

0.862

TC (mmol/L)

4.6 ± 1.07

4.99 ± 1.3

0.037

LDL-c (mmol/L)

2.65 ± 0.88

3.04 ± 1.02

0.007

HDL-c (mmol/L)

1.12 ± 0.25

1.13 ± 0.24

0.911

Triglyceride (mmol/L)

1.37 ± 0.62

1.38 ± 0.83

0.962

Cystin-c (mg/L)

0.92 ± 0.17

1.04 ± 0.36

0.092

Glucose on admission (mmol/L)

8.60 ± 5.51

11.17 ± 5.78

0.009

Hs-cTnI on admission (pg/mL)

3020.70 ± 10,864.68

12,180.81 ± 18,134.70

<0.001

BNP on admission (pg/mL)

134.29 ± 207.14

419.02 ± 618.32

<0.001

Serum creatine (umol/L)

69.20 ± 15.02

86.40 ± 44.87

0.001

Blood urea nitrogen (mmol/L)

5.54 ± 1.65

6.67 ± 4.27

0.026

Fasting blood glucose (mmol/L)

6.60 ± 2.97

7.66 ± 2.85

0.018

CRP (mg/L)

8.00 ± 8.52

38.63 ± 55.03

0.005

WBC (*10⁹/L)

7.79 ± 3.82

9.57 ± 3.88

0.003

Neutrophil count (*10⁹/L)

5.23 ± 3.45

7.00 ± 3.65

0.001

N/L ratio

3.37 ± 2.84

5.41 ± 3.5

<0.001

Hemoglobin (g/L)

139.83 ± 15.94

141.4 ± 22.28

0.596

Platelet (*10⁹/L)

230.85 ± 87.43

231.87 ± 71.82

0.933

MPV (fl)

9.88 ± 1.81

9.51 ± 2.60

0.280

PDW (fl)

11.88 ± 3.51

11.57 ± 1.98

0.479

D-Dimer (mg/L)

0.64 ± 0.35

0.96 ± 0.89

0.002

LVEF (%)

60.53 ± 6.45

57.37 ± 7.8

0.004

LVDd (mm)

44.9 ± 6.06

47.97 ± 5.53

0.005

GRACE score

102.23 ± 36.27

139.03 ± 36.73

<0.001

PMA (%)

32.43 ± 11.05

43.2 ± 12.53

<0.001

Number of diseased vessels

1.46 ± 1.03

1.68 ± 0.96

0.062

Stent implantation, n (%)

75 (90.4)

86 (92.5)

0.616

Total stent count per patient, n

1.72 ± 1.20

1.83 ± 1.36

0.245

Total stent length (mm)

23.42 ± 9.56

24.78 ± 10.83

0.183

Stent diameter (mm)

3.13 ± 0.30

3.24 ± 0.32

0.876

Thrombus aspiration, n (%)

5 (6.0)

15 (16.1)

0.029

Intra-aortic balloon pump, n (%)

3 (3.6)

10 (10.8)

0.062

Plasma calprotectin (ng/mL)

2489.72 ± 747.58

5233.32 ± 1125.62

<0.001

Discharge BNP (pg/mL)

123.44 ± 185.55

485.55 ± 601.63

<0.001

Albumin (g/L)

39.11 ± 3.59

37.60 ± 3.85

0.008

Previous CAD, n (%)

29 (34.9)

32 (34.4)

0.941

 Aspirin

28 (33.7)

30 (32.3)

0.835

 Glycoprotein IIb/IIIa antagonist

10 (12.0)

12 (12.9)

0.864

 ACEI

21 (25.3)

24 (25.8)

0.939

 B-blocker

23 (27.7)

18 (19.4)

0.190

 Statin

31 (37.3)

36 (38.7)

0.853

 Nitrate

20 (24.1)

27 (29.0)

0.460

 No-reflow, n (%)

1 (1.2)

21 (22.8)

<0.001

 In-hospital MACE, n (%)

3 (3.6)

8 (8.6)

0.172

 In-hospital mortality, n (%)

1 (1.2)

4 (4.3)

0.217