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Table 1 Comparing the correlation and agreement of SpO2 of four probes with standardized SaO2

From: Accuracy of pulse oximetry in detection of oxygen saturation in patients admitted to the intensive care unit of heart surgery: comparison of finger, toe, forehead and earlobe probes

Statistical index Correlation Agreement
Probe type r p CI Rho CI 95%
Finger 0.76 < 0.001 −1.02-2.08 0.68 −0.80- 0.57
Toe 0.60 < 0.001 −1.69- 2.28 0.58 −0.74- 0.43
Earlobe 0.77 < 0.001 −1.54- 1.83 0.76 −0.87- 0.67
Forehead 0.73 < 0.001 −1.07- 3.58 0.50 −0.62- 0.38