Fig. 3From: A multicentre prospective observational study comparing arterial blood gas values to those obtained by pulse oximeters used in adult patients attending Australian and New Zealand hospitalsROC curve for SpO2 to predict SaO2 < 90%. The c-statistic for the logistic regression, representing the area under the ROC curve, was 0.986. SaO2: Oxygen saturation measured by arterial blood gas sample, SpO2: Oxygen saturation measured by standard pulse oximeterBack to article page