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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 %