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Table 3 Comparison of intraoperative hemodynamic and blood gas analysis data among 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
PaO2 (mmHg) 132 (121–141) 194 (175–214) 292 (262–358) < 0.001
Haematocrit (%) 31 (29–34) 30 (28–32) 30 (28–33) 0.027
Cardiac output (L/min)a 3.7 (3.1–4.2) 3.6 (3.1–4.1) 3.4 (3.0–3.8) < 0.001
Cardiac index (L/min/m2)a 2.1 (1.9–2.4) 2.1 (1.9–2.4) 2.0 (1.9–2.2) < 0.001
SvO2 (%)b 67 (63–71) 70 (66–74) 72 (69–76) < 0.001
  1. PaO2 Arterial oxygen partial pressure, SvO2 Mixed venous oxygen saturation
  2. aTwenty-six missing values
  3. b45 missing values