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Table 7 SAS Cut-off figures recommended by mathematical methods, together with the resulting sensitivity and specificity scores

From: Norms for Zung’s Self-rating Anxiety Scale

Mathematical ModelOptimum Cut-OffSensitivitySpecificity
Youden Index3978%88%
ROC Curvea3881%85%
  1. a In this instance both ROC curve methods, selecting the value for which the curve comes closest to the point (0,1) and selecting the value closest to the point where the curve intersects the line Se = Sp, yield the same result