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Table 3 Between-method statistical comparisons for the oxygen saturation measurement (SpO2trachea versus SvO2blood)

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

Intracuff pressure (cmH2O) n MD (%) SD SEM LOA SEL
0 20 4.87 3.10 0.73 -1.33 to 11.07 1.201
10 20 0.25 0.97 0.21 -1.69 to 2.19 0.376
20 20 0.22 0.89 0.19 -1.56 to 2.00 0.345
40 20 0.31 0.66 0.14 -1.01 to 1.63 0.256
60 20 0.17 0.74 0.18 -1.31 to 1.65 0.287
Overall 100 1.26 2.39 0.25 -3.52 to 6.04 0.414
Overall excluding 0 cmH2O 80 0.24 0.68 0.17 -1.12 to 1.6 0.132
  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.