Table 1

Baseline characteristics between admission oxygen saturation groups in those receiving supplemental oxygen

Admission oxygen saturation group
87% or less n=14788%–92% n=28293%–96% n=37597%–100% n=223
DECAF indices
 eMRCD Score, (IQR)5a (4–5a)5a (4–5b)5a (4–5a)5a (4–5b)
 Eosinopenia less than 0.05, %60.760.351.144.1
 CXR consolidation, %43.033.029.025.5
 pH less than 7.35/7.3, %53.8/34.918.9/9.726.1/12.331.5/20.1
 AF, %18.812.516.116.1
NEWS2-sats indices
 Respiratory rate, (SD)27.1 (7.7)25.0 (6.4)25.2 (6.5)26.3 (6.9)
 BP, systolic, mm Hg (SD)136 (31)135 (25)139 (28)141 (26)
 Pulse rate, (SD)108 (22)104 (19)104 (21)106 (21)
 AVPU and/or confusion, %24.013.610.716.3
 Temp. 38 °C/ 100.4 F or more, %18.313.711.96.6
pO2, kPa (SD)8.9 (5.7)8.7 (3.0)10.2 (4.6)13.9 (9.4)
pCO2, kPa (SD)8.4 (3.5)6.6 (2.4)6.6 (2.1)7.2 (3.2)
  • AF, atrial fibrillation; AVPU, alert, voice, pain, unresponsive; BP, blood pressure; CXR, chest radiograph; DECAF, dyspnoea, eosinopenia, chest X-ray consolidation, acidaemia, atrial fibrillation; eMRCD, extended Modified Research Council Dyspnoea score; kPa, kilopascals; NEWS2, National Early Warning Score; pCO2, partial pressure of carbon dioxide; pO2, partial pressure of oxygen; Temp., temperature.