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Table 2 agreement and mean difference of Finger, Toe, Earlobe and Forehead pulse oximeters comparing to Standard 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 Mean SD Mean difference
SaO2-SpO2
p-Value for t-test of mean difference CI 95% for agreement
SpO2 probe      
Forehead 95.55 1.75 1.25 ± 1.18 < 0.001 0.38–0.62
Earlobe 96.67 1.34 0.14 ± 0.86 0.019 0.67–0.87
Finger 96.28 1.06 0.53 ± 0.79 < 0.001 0.57–0.80
Toe 96.52 1.06 0.29 ± 1.01 0.22 0.43–0.74