Variable | Derivation cohort | Internal validation | |
---|---|---|---|
Wald χ2 | OR (95% CI) | OR (95% CI) | |
Patient variables | Â | Â | Â |
  Age ≥70 years, per 10 years | 20.56 | 1.23 (1.11, 2.66) | 1.23 (1.12, 1.36) |
  Chronic lung disease | 14.40 | 1.49 (1.21, 1.83) | 1.49 (1.21,1.87) |
Ejection fraction (EF) a | Â | Â | Â |
  EF 20-34% | 6.03 | 1.64 (1.11, 2.44) | 1.64 (1.05,2.37) |
  EF <20% | 13.54 | 3.06 (1.69, 5.55 | 3.06 (1.49,5.35) |
Surgical variables | Â | Â | Â |
  Single-valve repair or replacement + non-CABG surgeryb | 5.86 | 1.41 (1.07, 1.86) | 1.41 (1.05,1.82) |
  Repair or replacements of ≥2 valvesb | 6.2 | 2.13 (1.18, 3.86) | 2.13 (1.00,3.88) |
Postoperative CVICU variables | Â | Â | Â |
  Cardiac arrest | 65.06 | 4.04 (2.88, 5.66) | 4.03 (2.69, 6.15) |
  Pneumonia | 77.84 | 3.08 (2.40, 3.96) | 3.08 (2.37, 4.09) |
  Pleural effusion | 45.65 | 2.86 (2.11, 3.88) | 2.86 (2.03, 3.83) |
  Deep sternal wound infection | 48.29 | 6.58 (3.87, 11.18) | 6.57 (3.33,13.11) |
  Leg graft harvest site infection | 4.93 | 1.56 (1.05, 2.31) | 1.56 (1.02,2.46) |
  Gastrointestinal bleed | 61.45 | 4.67 (3.18, 6.86) | 4.66 (2.93,7.22) |
  Neurologic complicationc | 24.16 | 2.22 (1.61, 3.05) | 2.21 (1.57, 3.17) |