Table 5 Univariable analysis of risk factors of significant recurrent tricuspid regurgitation

Gender

 Male

4

6.8

55

93.2

3.755

0.054

 Female

11

19.3

46

80.7

Left side surgery

 None-MVR

13

13.0

87

87.0

0.003

0.956

 MVR

2

12.5

14

87.5

NYHA class

 1

0

0

14

100

6.155

0.104

 2

7

11.5

54

88.5

 3

6

17.1

29

82.9

 4

2

33.3

4

66.7

Preoperative Af

 Yes

14

18.2

63

81.8

5.608

0.018

 No

1

2.6

38

97.4

Severity of FTR Preoperatively

 Mild

0

0

40

100

18.353

0.001

 Moderate

6

12.2

43

87.8

 Severe

9

31.0

18

69.0

Severity of FTR when discharge

 None

4

8.5

43

91.5

3.284

0.167

 Mild

4

10.5

34

89.5

 Moderate

7

22.6

24

77.4

Postoperative Af

 Yes

7

63.6

4

36.4

27.751

0.001

 No

8

7.6

97

92.4

Age (years)

56.06 ± 11.58

64.33 ± 10.78

2.603

0.010*

BSA (m²)

1.73 ± 0.19

1.58 ± 0.13

− 4.156

0.001**

TAPSE (cm)

1.78 ± 0.17

1.73 ± 0.18

− 1.059

0.292

PASP (mmHg)

37.48 ± 13.05

40.53 ± 11.13

0.862

0.391

LA (mm)

47.57 ± 7.02

49.80 ± 8.14

1.116

0.267

RA (mm)

43.79 ± 5.57

45.47 ± 9.63

0.657

0.521

RV (mm)

36.38 ± 4.92

35.87 ± 3.83

− 0.384

0.702

LVEDD (mm)

50.92 ± 7.50

49.40 ± 5.89

− 0.751

0.454

LVESD (mm)

33.88 ± 5.58

34.27 ± 4.35

0.256

0.798

LVEF

0.61 ± 0.04

0.58 ± 0.04

− 2.648

0.009**

TAD (mm)

34.05 ± 3.12

35.60 ± 4.10

1.723

0.088

Length of septal annulus (cm)

3.75 ± 0.38

4.15 ± 0.54

3.546

0.001**

Length of anterior annulus (cm)

4.47 ± 0.53

5.15 ± 0.57

4.619

0.001**

Length of posterior annulus (cm)

3.40 ± 0.48

3.91 ± 0.65

3.710

0.001**

TAC (cm)

11.62 ± 1.11

13.21 ± 1.35

5.028

0.001**

TACI (cm/m²)

6.77 ± 0.83

8.39 ± 0.61

7.259

0.001**