Table 1

Multivariable modelling of postoperative outcomes using preoperative and operative factors

PredictorMissingCategoryHospital mortalityReturn to theatre for bleedingNew strokePost-operative length of stay (days)
ORP valueORP valueORP valueORP value
Age (years)7.9%Per unit increase1.03 (1.02–1.04)<0.0011.01 (1.00–1.01)0.0061.02 (1.01–1.03)0.0011.00 (1.00–1.00)<0.001
Gender10.3%Female----
Male0.63 (0.51–0.77)<0.0011.18 (1.02–1.36)0.0261.02 (0.80–1.29)0.890.94 (0.93–0.96)<0.001
LVEF3.1%Good (>50%)
Moderate (30%–50%)1.48 (1.18–1.85)0.0011.08 (0.91–1.27)0.381.13 (0.86–1.48)0.381.08 (1.06–1.10)<0.001
Poor (<30%)1.90 (1.36–2.69)<0.0011.10 (0.82–1.48)0.530.78 (0.44–1.38)0.401.07 (1.03–1.11)0.001
EuroSCORE logistic12.1%Per unit increase1.02 (1.02–1.03)<0.0011.01 (1.00–1.01)0.161.00 (0.99–1.02)0.301.01 (1.01–1.01)<0.001
Operative urgency0.02%1.Elective
2.Urgent1.63 (1.30–2.00)<0.0011.26 (1.08–2.00)0.0021.08 (0.83–1.41)0.551.18 (1.16–1.20)<0.001
3.Emergency6.87 (4.70–10.16)<0.0012.22 (1.51–3.26)<0.0017.65 (5.00–11.70)<0.0011.78 (1.67–1.90)<0.001
4.Salvage11.79 (5.73–24.27)<0.0011.51 (0.56–4.02)0.414.38 (1.47–13.1)0.0081.25 (1.07–1.46)0.006
Cumulative bypass time (mins)2.4%Per unit increase1.02 (1.01–1.02)<0.0011.00 (1.00–1.01)<0.0011.00 (1.00–1.01)<0.0011.00 (1.00–1.00)<0.001
Cumulative cross clamp tme (mins)2.5%Per unit increase0.99 (0.99–0.99)<0.0011.00 (1.00–1.00)0.231.00 (0.99–1.00)0.581.00 (1.00–1.00)0.78
CABG0%No
Yes1.15 (0.93–1.42)0.201.07 (0.93–1.24)0.331.12 (0.88–1.42)0.371.03 (1.00–1.05)<0.001
  • CABG, coronary artery bypass graft surgery; LVEF, left ventricular ejection fraction.