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Table 5 Comparison of secondary outcomes after off-pump coronary artery bypass grafting between the study groups

From: Intraoperative mild hyperoxia may be associated with improved survival after off-pump coronary artery bypass grafting: a retrospective observational study

  Normoxia/near-normoxia (n = 229) Mild hyperoxia (n = 991) Severe hyperoxia (n = 173) P
Acute kidney injurya 67 (29.3%) 272 (27.4%) 34 (19.7%) 0.066
Newly initiated renal replacement therapy 7 (3.1%) 25 (2.5%) 4 (2.3%) 0.874
Prolonged intubationb 25 (11%) 43 (4.3%) 5 (2.9%) < 0.001
Supplemental oxygen therapy after extubation (hour) 83 (51–120) 61 (35–94) 53 (33–80) < 0.001
  1. Values are expressed as median (interquartile range) or number (%)
  2. aDefined based on the serum creatinine criteria of the kidney disease: improving Global Outcomes definition
  3. bDefined as cases where tracheal intubation was still required after 48 postoperative hours