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Figure 5


Fig. 4B —Receiver operating characteristic (ROC) curves for both groups of patients with sickle cell disease. Green = reference line; red = pulsatility index. ROC curve for group 1 (homozygous, SS) patients (A) shows cutoff considered to be 0.70 for resistive index (RI). Area under curve = 0.98. ROC curve for group 2 (heterozygous, AS) patients (B) shows cutoff considered to be 0.70 for resistive index (RI). Area under curve = 0.97.