Sensitivity and specificity were 0.38 and 0.99, respectively, resulting in a positive likelihood ratio (LR+) of 42.0, which is well above the threshold of 10 typically used to consider screening scale diagnoses definitive (Gardner & Altman, 2000). Consistent with the high LR+, the proportion of CIDI cases confirmed by the SCID was 86.1%. This means the vast majority of CIDI/DSM-IV PTSD cases would independently be confirmed by a blinded trained clinician. Missing symptom reports, which were rare, were coded conservatively as the symptoms being absent.
