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Table 5 Between-method statistical comparisons for oxygen saturation measurements in hemorrhagic shock status (SpO2trachea versus SvO2blood)

From: A preliminary study on the monitoring of mixed venous oxygen saturation through the left main bronchus

Time n MD (%) SD SEM LOA SEL
Pre-shock period 20 -0.845 3.065 0.685 -6.975 to 5.285 1.187
Immediately after onset of shock 20 0.495 3.014 0.674 -5.533 to 6.523 1.167
15 min after shock 20 -0.165 3.210 0.718 -6.585 to 6.255 1.243
30 min after shock 20 -1.275 2.759 0.617 -6.793 to 4.243 1.069
15 min after resuscitation 20 -0.315 1.509 0.3374 -3.333 to 2.703 0.584
30 min after resuscitation 20 0.460 2.463 0.551 -4.466 to 5.386 0.954
60 min after resuscitation 20 1.865 2.844 0.636 -3.823 to 7.553 1.101
  1. LOA, limits of agreement (MD ± 1.96SD); MD, mean difference; SD, standard deviation of the difference; SEL, standard error of limit; SEM, standard error of the mean difference; SpO2trachea, mixed venous oxygen saturation measured through the left main bronchus; SvO2blood, oxygen saturation from pulmonary artery samples.