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Table 4 Perioperative variables independently predictive of cardiovascular intensive care readmission

From: Predicting cardiovascular intensive care unit readmission after cardiac surgery: derivation and validation of the Alberta Provincial Project for Outcomes Assessment in Coronary Heart Disease (APPROACH) cardiovascular intensive care unit clinical prediction model from a registry cohort of 10,799 surgical cases

Variable

Derivation cohort

Internal validation

Wald χ2

OR (95% CI)

OR (95% CI)

Patient variables

   

  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

   

  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

   

  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

   

  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)

  1. aReference ejection fraction >50%; breference isolated coronary artery bypass; non-CABG procedures most commonly included left atrial appendage ligations, maze procedures, and atrial septal defect or patent foramen ovale closures; cneurologic complication defined as: cerebrovascular accident, intracranial hemorrhage, coma ≥24 hours, encephalopathy, or paralysis. CABG: coronary artery bypass grafting; CI: confidence interval; CVICU: cardiovascular intensive care unit; OR: odds ratio.