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Table 1 Characteristics of the overall population and propensity matched patients

From: Minimally invasive or sternotomy approach in mitral valve surgery: a propensity-matched comparison

 

Overall

Matched Patients

 

MINI

STERNOTOMY

p-value

MINI

STERNOTOMY

p-value

Variable

n = 189

n = 336

 

n = 158

n = 225

 

Age (years)

64.1 ± 9.1

65.6 ± 10.4

0.02

64.8 ± 8.9

65.4 ± 10.9

0.16

Gender (male)

85 (45%)

145 (43%)

0.71

64 (41%)

95 (42%)

0.75

BMI (kg/m2)

27.9 ± 4.4

29.0 ± 6.1

0.11

28.0 ± 4.5

29.3 ± 6.2

0.07

Previous MI

12 (6%)

35 (10%)

0.15

8 (5%)

20 (9%)

0.17

Diabetes mellitus

23 (12%)

76 (23%)

0.004

22 (14%)

39 (17%)

0.40

Arterial hypertension

136 (72%)

239 (71%)

0.23

119 (75%)

161 (72%)

0.35

COPD

23 (12%)

48 (14%)

0.60

20 (13%)

25 (11%)

0.75

Hyperlipidaemia

95 (50%)

179 (53%)

0.53

83 (53%)

117 (52%)

1.00

Atrial fibrillation

77 (41%)

148 (44%)

0.52

71 (45%)

99 (44%)

0.92

Peripheral arterial disease

1 (1%)

12 (4%)

0.04

1 (1%)

1 (0%)

1.00

Cerebrovascular disease

16 (8%)

24 (7%)

0.61

16 (10%)

15 (7%)

0.26

Smoking

49 (26%)

101 (30%)

0.37

39 (25%)

54 (24%)

0.90

LVEF (%)

58.2 ± 11.3

57.3 ± 12.0

0.10

58.9 ± 10.4

58.1 ± 11.0

0.15

Pulmonary hypertension

21 (11%)

57 (17%)

0.08

21 (13%)

31 (14%)

1.00

EuroScore II (%)

2.4 ± 2.2

4.1 ± 5.2

<  0.001

2.6 ± 2.3

2.9 ± 2.2

0.06

Creatinine concentration (μmol/l)

83.0 ± 18.6

99.4 ± 59.9

<  0.001

83.7 ± 19.2

87.5 ± 21.2

0.10

NYHA class

 I + II

126 (67%)

144 (43%)

<  0.001

95 (60%)

122 (54%)

0.30

 III + IV

63 (33%)

180 (54%)

<  0.001

63 (40%)

103 (46%)

0.30

Mitral valve stenosis

2 (1%)

27 (8%)

<  0.001

2 (1%)

6 (3%)

0.48

Mitral valve regurgitation

187 (99%)

309 (92%)

<  0.001

156 (99%)

219 (97%)

0.48

Mitral valve regurgitation grade

 1 + 2

1 (1%)

15 (4%)

0.01

1 (1%)

5 (2%)

0.41

 3 + 4

188 (99%)

315 (94%)

<  0.001

157 (99%)

217 (96%)

0.09

Mitral valve pathology

 Degenerative

166 (88%)

281 (84%)

0.20

140 (89%)

203 (90%)

0.62

 Rheumatic

1 (1%)

14 (4%)

0.01

1 (1%)

3 (1%)

0.65

 Ischemic

11 (6%)

23 (7%)

0.72

7 (4%)

11 (5%)

1.00

 Secondary

11 (6%)

13 (4%)

0.38

10 (6%)

8 (4%)

0.23

Acute operation

0 (0%)

16 (5%)

<  0.001

0 (0%)

0 (0%)

1.00

  1. BMI body mass index; COPD chronic obstructive pulmonary disease; LVEF left ventricle ejection fraction; Pulmonary hypertension –systolic pulmonary artery pressure ≥ 55 mmHg