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. 2012 Dec 3;20:78. doi: 10.1186/1757-7241-20-78

Table 2.

Oxygen saturation, frequency of intubation of patients in the state of moderate or severe shock

  BE -2 to -6
BE < -6
At scene ER p At scene ER p
SpO2, mean % (SD)
89.5 (12.1)
96.8 (5.1)
<0.001
87.9 (17.2)
94.9 (11.8)
<0.001
Intubation, n (%)
183/258 (71.3)
242/258 (93.8)
<0.001
200/256 (78.1)
246/255 (96.5)
<0.001
Chest tube, n (%) 42/258 (16.3) 133/254 (52.4) <0.001 44/256 (17.2) 134/254 (52.8) <0.021

Mean oxygen saturation at scene and upon ER arrival, frequency of intubation and ventilation according to the subgroups of patients in the state of moderate (BE -2 to -6) and severe shock (BE < -6) upon ER admission.