Table 5: Result of the quality control study on PHQ9 accuracy. Gold standard diagnosis of DSM-IV current major depressive disorder by ANTAS-SCID cut-off 7/8 (left column) and 9/10 (right column).

Cut-off 7/8 Cut-off 9/10
Sensitivity 72.7% 87.5%
Specificity 94.9% 97.1%
Predictive Positive Value 80% 87.5%
Predictive Negative Value 92.5% 80.9%

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