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Six months after September 11, 2001 (9/11), 124 New York City workers participated in a self-report study of symptoms of posttraumatic stress disorder (PTSD). Although direct exposure to the terrorist attacks of 9/11 was limited, estimates of the prevalence of current PTSD in this mostly ethnic minority population ranged from 7.8% to 21.2%, as measured by the PTSD Checklist (F. W. Weathers, B. T. Litz, D. S. Herman, J. A. Huska, & T. M. Keane, 1993). Consistent with the study hypotheses, direct exposure to the attacks of 9/11, worries about future terrorist attacks (threat appraisal), and reduced confidence in self after 9/11 each predicted symptoms of PTSD, even after controlling for symptoms of anxiety and depression. These results support the idea that a traumatic event's meaning is associated with PTSD symptoms. Gender was not a significant predictor of symptoms, once other demographic variables were controlled. Most respondents who met the criteria for current PTSD had not sought therapy or counseling.
Piotrkowski et al. (Tue,) studied this question.