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Table 2 Baseline characteristics of study patients based on the level of MMP9 in the constrictive pericardium

From: Predictive value of matrix metalloprotease 9 on surgical outcomes after pericardiectomy

Variables

MMP9-low group (N = 11)

MMP9-high group (N = 11)

P value

Gender

 Male

11 (100%)

11 (100%)

 

Age, years

70 (54–80)

73 (54–80)

0.270

Etiology

  

 Tuberculosis

11 (100%)

11 (100%)

 

Preoperative NYHA functional class

  

0.327

 I

2 (18.2%)

0 (0%)

 

 II

1 (9.1%)

3 (27.3%)

 

 III

8 (72.7%)

8 (72.7%)

 

Hypertension

1 (9.1%)

2 (18.2%)

1.000

Diabetes

2 (18.2%)

2 (18.2%)

1.000

Heart disease*

2 (18.2%)

4 (36.4%)

0.635

BMI, kg/m2

21.3 (17.3–24.8)

21.0 (17.7–24.8)

0.652

Pulse rate, beats/min

98 (80–112)

90 (80–145)

0.699

Preoperative CVP, cmH2O

23.0 (20.5–30.0)

30.0 (20.4–42.5)

0.065

Pericardial thickness, mm

10.7 (8.2–16.0)

10.7 (7.0–16.0)

0.847

LVEF, %

54.3 (50.0–56.4)

56.0 (51.9–64.0)

0.101

CRP, mg/L

11.7 (5.0–21.0)

17.0 (5.0–62.5)

0.076

ESR, mm/h

37.0 (3.0–52.0)

37.0 (17.0–68.0)

0.300

  1. Values presented as N (percentage) for categorical variables and median (range) for continuous variables
  2. MMP9-low was defined as the level of MMP9 < 3.67 and MMP9-high was defined as MMP9 ≥ 3.67
  3. MMP, matrix metalloproteinase; NYHA, New York Heart Association; BMI, body mass index; CVP, central venous pressure; LVEF, left ventricular ejection fraction (measured on echocardiogram); CRP, C-reactive protein; ESR, erythrocyte sedimentation rate
  4. *Heart disease included atrial fibrillation and coronary heart disease