On the viability of PTSD Checklist (PCL) short form use: analyses from Mississippi Gulf Coast Hurricane Katrina survivors.

One measure commonly used to assess posttraumatic stress disorder is the PTSD Checklist (PCL). Lang and Stein (2005) extracted 4 subsets of PCL items, validating 2 of them for possible use in screening in primary care settings. The viability of the 4 item subsets was evaluated psychometrically in the present study with a sample of Hurricane Katrina survivors (N = 337). Corrected item-total and corrected item-cluster correlations were calculated and compared with those obtained by Lang and Stein. In addition, the sensitivity, specificity, and overall correct classification of the 4 item subsets were evaluated. With methodology approximating Lang and Stein's work, the current data would lead to the development of different screening versions of the PCL. Although some psychometric support was achieved (e.g., high sensitivity), use of the Lang and Stein PCL item subsets for screening natural disaster survivors appears unjustified on the basis of the present data.