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Table 2 Multivariable logistic regression analyses for in-hospital and 1 year mortality after aortic 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 (> 70 cases/year)

Reference

Reference

  Medium-volume (20–70 cases/year)

1.53

1.09–2.15

0.013

1.92

1.51–2.43

 < 0.001

  Low-volume (< 20 cases/year)

2.31

1.73–3.09

 < 0.001

2.21

1.77–2.74

 < 0.001

Age, years

  18–49

Reference

Reference

  50–59

1.52

0.75–3.07

0.246

1.43

0.86–2.40

0.172

  60–69

1.58

0.81–3.08

0.182

1.66

1.02–2.70

0.041

  70–79

3.04

1.57–5.87

 < 0.001

3.03

1.88–4.88

 < 0.001

  ≥ 80

4.05

2.00–8.18

 < 0.001

4.42

2.65–7.38

 < 0.001

Female

1.40

1.10–1.80

0.007

1.01

0.84–1.21

0.932

Hypertension

0.83

0.62–1.11

0.211

0.89

0.72–1.11

0.308

Dyslipidaemia

1.11

0.85–1.45

0.453

0.98

0.80–1.20

0.872

Diabetes mellitus

1.11

0.83–1.47

0.490

1.21

0.98–1.50

0.081

Extracardiac arteriopathy

1.13

0.83–1.53

0.447

1.07

0.85–1.35

0.576

Chronic lung disease

1.16

0.91–1.49

0.227

1.17

0.97–1.40

0.098

Renal impairment

2.96

1.91–4.59

 < 0.001

2.90

2.00–4.20

 < 0.001

Atrial fibrillation

1.55

1.07–2.23

0.020

1.41

1.07–1.86

0.016

Angina pectoris

0.98

0.76–1.27

0.880

1.03

0.85–1.25

0.742

Recent myocardial infarction*

1.32

0.73–2.42

0.362

1.06

0.65–1.75

0.815

Congestive heart failure

1.05

0.79–1.40

0.726

1.10

0.89–1.36

0.368

Urgent or emergent surgery

2.68

1.48–4.86

0.001

1.60

0.93–2.74

0.090

Red blood cell transfusion, units†

  0–1

Reference

Reference

  2–3

2.76

1.19–6.39

0.018

1.56

1.07–2.27

0.020

  4–5

7.35

3.15–17.15

 < 0.001

3.20

2.16–4.76

 < 0.001

  ≥ 6

53.32

23.13–122.91

 < 0.001

16.97

11.40–25.24

 < 0.001

Aortic valve diagnosis

  Stenosis

Reference

Reference

  Insufficiency

0.99

0.68–1.44

0.939

0.88

0.67–1.16

0.363

  Stenoinsufficiency

0.88

0.61–1.27

0.501

1.05

0.81–1.36

0.728

  Not specified

1.61

1.04–2.50

0.033

1.34

0.94–1.91

0.106

Concurrent CABG

1.40

1.05–1.76

0.022

1.27

1.02–1.58

0.035

Infective endocarditis

2.29

1.53–3.43

 < 0.001

2.36

1.71–3.25

 < 0.001

Surgery year

0.99

0.94–1.04

0.648

1.00

0.96–1.04

0.948

  1. OR Odds ratio; CI Confidence interval; CABG Coronary artery bypass grafting
  2. *Diagnosed within three months before surgery
  3. †During the hospitalisation for surgery
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Journal of Cardiothoracic Surgery

ISSN: 1749-8090

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