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Table 3 Multivariable logistic regression analyses for in-hospital and 1 year mortality after mitral valve replacement

From: Institutional case volume and mortality after aortic and mitral valve replacement: a nationwide study in two Korean cohorts

 

In-hospital mortality

1 year mortality

OR

95% CI

P

OR

95% CI

P

Case volume strata

  High-volume (> 40 cases/year)

Reference

Reference

  Medium-volume (15–40 cases/year)

1.97

1.35–2.88

 < 0.001

1.83

1.36–2.46

 < 0.001

  Low-volume (< 15 cases/year)

2.29

1.60–3.27

 < 0.001

1.95

1.46–2.60

 < 0.001

Age, years

  18–49

Reference

Reference

  50–59

1.51

0.91–2.49

0.111

1.54

1.03–2.32

0.037

  60–69

1.63

1.01–2.66

0.047

1.97

1.33–2.91

0.001

  70–79

3.48

2.16–5.60

 < 0.001

3.65

2.46–5.40

 < 0.001

  ≥ 80

7.77

4.12–14.64

 < 0.001

9.40

5.52–16.01

 < 0.001

Female

1.18

0.89–1.57

0.246

1.05

0.84–1.33

0.660

Hypertension

0.93

0.68–1.27

0.637

0.98

0.75–1.26

0.845

Dyslipidaemia

1.15

0.82–1.61

0.408

0.95

0.72–1.26

0.747

Diabetes mellitus

1.28

0.90–1.81

0.168

1.21

0.90–1.63

0.200

Extracardiac arteriopathy

1.18

0.81–1.71

0.387

1.47

1.09–1.99

0.013

Chronic lung disease

0.76

0.58–1.00

0.053

0.88

0.70–1.09

0.241

Renal impairment

5.27

2.89–9.60

 < 0.001

6.79

3.74–12.33

 < 0.001

Angina pectoris

0.97

0.71–1.34

0.859

1.02

0.78–1.33

0.895

Recent myocardial infarction*

1.18

0.54–2.58

0.677

1.09

0.55–2.14

0.808

Congestive heart failure

1.07

0.79–1.45

0.654

1.12

0.88–1.43

0.369

Urgent or emergent surgery

1.64

0.95–2.84

0.078

1.69

1.03–2.75

0.036

Red blood cell transfusion, units

  0–1

Reference

Reference

  2–3

4.82

1.50–15.47

0.008

1.36

0.84–2.19

0.215

  4–5

14.48

4.51–46.49

 < 0.001

3.45

2.11–5.62

 < 0.001

  ≥ 6

74.06

23.22–236.14

 < 0.001

16.92

10.39–27.55

 < 0.001

Rheumatic mitral valve disease

0.81

0.59–1.12

0.199

0.85

0.66–1.09

0.204

Concurrent atrial fibrillation surgery

0.85

0.62–1.15

0.267

0.76

0.59–0.97

0.029

Concurrent tricuspid valve repair

0.98

0.73–1.31

0.890

0.99

0.78–1.26

0.932

Infective endocarditis

0.46

0.13–1.71

0.248

0.24

0.06–0.87

0.030

Surgery year

0.99

0.93–1.05

0.648

0.96

0.92–1.01

0.840

  1. OR Odds ratio; CI Confidence interval
  2. *Diagnosed within three months before surgery
  3. During the hospitalisation for surgery