Table 3

Mortality and adjusted ORs for 90 day in-hospital mortality according to hyperoxaemia variables

VariablePatients, n (%)Deaths, n (%)OR*P values
PaO2MAX 10 141
 Fourth quintile (<137 mm Hg)8081 (79.7)500 (6.2)1
 Upper quintile (≥137 mm Hg)2060 (20.3)84 (4.1)0.79 (0.61–1.02)0.0715
PaO2AVG
 Fourth quintile (<105 mm Hg)8140 (80.3)510 (6.3)
 Upper quintile (≥105 mm Hg)2001 (19.7)74 (3.7)0.92 (0.69–1.24)0.5863
PaO2MED
 Fourth quintile (<103 mm Hg)8111 (80.0)513 (6.3)
 Upper quintile (≥103 mm Hg)2030 (20.0)71 (3.5)0.82 (0.61–1.11)0.2005
AUC72
 Fourth quintile (<174 mm Hg)8124 (80.1)422 (5.2)
 Upper quintile (≥174 mm Hg)2017 (19.9)162 (8.0)1.53 (1.25–1.88)<0.0001
  • *Adjusted for age, sex, NEWS, initial bilirubin and initial PO2.

  • PO2, PaO2 of oxygen; PaO2Max, highest value of PO2 within 72 hours; PaO2AVG, average value of PO2 within 72 hours; PaO2MED, median value of PO2 within 72 hours; AUC72, area under the curve divided by elapsed time between ED arrival and the last result of PO2 within 72 hours.