... differing rates of PTSD between the K-SADS and the CATS (using a cut-off 27 on the CATS), suggests that thiscut-off may be too high in our setting. The ROC analysisyielded a cut-off of 15 on the CATS. ... asked to indi-cate how often they are jumpy and nervous, or how oftenthey sleep poorly – never, rarely, sometimes or often. Each of the DSM-IV PTSD criterion variables is represented byat least ... indicates that the CATS may bebetter utilized as a PTSD screening device (as suggested byits author), with a cut-off threshold of 15 instead of the original threshold of 27, in the South African...