Follow-up of Pentagon employees two years after the terrorist attack of September 11, 2001.

Objective: This study examined probable posttraumatic stress disorder (PTSD) and probable depression, degree of psychological distress, and rates of mental health treatment in a sample of Pentagon staff two years after the terrorist attack of September 11, 2001.

Methods: Anonymous surveys were administered to staff at one Pentagon work center. Respondents were asked about exposure to the attack; injuries; exposure to dead bodies or families of the deceased; psychological distress; and use of mental health services.