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Table 4 Factors independently associated with 30 day mortality following valve surgery in logistic regression modelling and variance explained by the model

From: A review of outcome following valve surgery for rheumatic heart disease in Australia

Odds Ratio (95 % CI)

All

RHD-related

Non-RHD

 Age (/additional year)

1.01 (1.00 – 1.02)

-

-

 Female sex

-

-

1.4 (1.1 – 1.8)

Pre-operative comorbidities

 Chronic kidney disease

2.4 (1.8 – 3.2)

4.3 (2.0 – 9.2)

2.6 (2.0 – 3.3)

Pre-operative status

   

 NYHA III & IV

1.7 (1.3 – 2.1)

-

1.7 (1.3 – 2.2)

 LVEF 30 – 45 %

2.4 (1.8 – 3.2)

-

2.4 (1.8 – 3.3)

 LVEF <30 %

3.5 (2.4 – 5.1)

-

3.6 (2.5 – 5.3)

 Mitral valve regurgitation

1.2 (1.1 – 1.3)

-

1.2 (1.1 – 1.2)

 Mitral valve stenosis

0.9 (0.8 – 0.9)

-

0.9 (0.8 – 0.9)

Previous procedures

   

 Valve surgery

2.4 (1.6 – 3.4)

2.5 (1.1 – 5.8)

2.4 (1.6 – 3.5)

Initial admission

 ICU stay (>43 h)

0.7 (0.6 – 0.9)

0.3 (0.1 – 0.7)

-

 Post procedure LOS (/additional day)

0.97 (0.96 – 0.98)

-

0.96 (0.95 – 0.97)

Complications within 30 days

 Readmission

0.4 (0.3 – 0.7)

-

0.4 (0.2 – 0.6)

 Re-operation for valve dysfunction

-

27.5 (2.2 – 338.9)

-

 Re-operation not related to valve dysfunction

2.7 (2.0 – 3.8)

3.3 (1.3 – 8.4)

2.8 (2.2 – 3.9)

 Acute kidney injury

7.3 (5.5 – 9.8)

7.3 (2.9 – 17.9)

6.9 (5.1 – 9.3)

 Stroke/ TIA

4.6 (2.9 – 7.2)

-

4.6 (2.8 – 7.4)

 Anticoagulant complication

2.9 (1.7 – 5.1)

-

2.8 (1.5 – 5.1)

 Septicaemia

9.5 (6.1 – 15.27)

9.0 (2.5 – 32.3)

10.2 (6.3 – 16.4)

Explained variance

 (Nagelkerke R Square statistic [68])

24.6 %

24.7 %

25.1 %