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Figure 6 | BMC Pregnancy and Childbirth

Figure 6

From: Uterine artery Doppler in the management of early pregnancy loss: a prospective, longitudinal study

Figure 6

The receiver-operator characteristic (ROC) curve for the different values of the resistance index concerning the discrimination between groups (I + II) and III. The values 0.7, 0.8, 0.9 and 1.0 are identified in the curve with a circle. The point in the curve that is closer to the upper-left corner of the plot corresponds to value 1 for the resistance index. At that cut-off point, the sensitivity and specificity values of the resistance index in the uterine artery were of 65.0% (CI 95%: 59.3%-70.3%) and 87.5% (CI 95%: 71.9%-95.0%), respectively; the area under the curve (AUC) was 0.798 (0.754-0.843). The correspondent positive and negative predictive values were 97.9% and 22.0%, respectively. The likelihood ratio (LR) for a positive or negative test was 5.20 (CI 95%: 2.07%-13.06%) or 0.40 (CI 95%: 0.33%-0.49%), respectively.

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