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Traumatology, Vol. 11, No. 2, 87-102 (2005)
DOI: 10.1177/153476560501100204

Chronic Posttraumatic Stress Symptoms in Victims of Tokyo Subway Sarin Gas Attack

Noriko Kawana

St. Luke’s International Hospital

Shin-ichi Ishimatsu

St. Luke’s International Hospital

Yukio Matsui

St. Luke’s International Hospital

Shinichi Tamaki

University of Tokyo

Katsuya Kanda

University of Tokyo

Through the experience of providing care for Tokyo subway sarin gas victims in the aftermath of the March, 1995 attack, the authors observed various unexplained physical symptoms as well as psychological symptoms. Most of the physical symptoms in these victims seemed to have been related not to the sarin poisoning, but to psychological aftereffects.

There are two aims to this study. The first aim is the development of the St. Luke’s questionnaire of posttraumatic stress symptoms: (SLQ-PTSS), to document the aftereffects of this traumatic sarin event with both psychological and physical indicators.

The second is the study of the longitudinal course of posttraumatic stress symptoms (PTSS) in victims (n = 1722) 5-8 years after the attack. Based on their Impact of Events (-R) (IES-R) score five years following the attack, victims were divided into three groups: a high impact group (IES-R total score >25), a medium group (12-24), and a normal group (≤ 11). Each group showed a different course on the SLQ-PTSS during the chronic phase.

Key Words: multiple unexplained physical symptoms • sarin gas trauma victims • terrorist attack • chronic PTSD • "masked" posttraumatic stress disorder


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