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Table 8 Comparison of mathematical values obtained with optimum cut-off versus the current and original cut-offs recommended by Zung*

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

Mathematical Model

Optimum(39/38)

Current (36)

Original (40)

Youden Index

.660

.636

.650

ROC Curve: distance from point (0,1)

.243

.271

.276

  1. * For the Youden Index higher values are desirable, for the ROC curve lower values
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BMC Psychiatry

ISSN: 1471-244X

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