Fig. 2From: Peripheral perfusion index predicting prolonged ICU stay earlier and better than lactate in surgical patients: an observational studyThe ROC curves of PPIT1 and lactateT1 for prolonged ICU stay in surgical patients transferred to ICU. a: The ROC curve of PPTT1 in predicting prolonged ICU stay. The dotted line is reference line; solid line is PPTT1; b: The ROC curve of lactateT1 in predicting prolonged ICU stay; The dotted line is reference lineBack to article page