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Positive and negative predictive value of the BDI-II. Positive predictive value (PPV) is the probability that a participant has MDD given that they are above the designated BDI-II cut off score. Negative predictive value (NPV) is the probability that a participant does not have MDD given that they are below the designated BDI-II cut off score. Correctly diagnosed/ not diagnosed was determined by Composite International Diagnostic Interview.
