End-points Unadjusted HR (95% CI) p Adjusted HR (95% CI) p
Patients with reduced oxygen saturation
Death or invasive mechanical ventilation 0.91 (0.42–1.97) 0.82 0.92 (0.33-2.56) 0.87
Invasive mechanical ventilation 0.67 (0.25–1.78) 0.42 0.46 (0.11-1.99) 0.30
Death 1.24 (0.54–2.84) 0.62 1.25 (0.44-3.54) 0.67
Patients with normal oxygen saturation
Death or invasive mechanical ventilation 0.76 (0.07–8.57) 0.83 0.83 (0.07-9.44) 0.88
Invasive mechanical ventilation NA NA
Death 0.99 (0.09–11.08) 0.99 1.10 (0.10 – 12.46) 0.94