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Comparative Analysis of the Japanese Version of the Revised Impact of Event Scale: A Study of Firefighters

Published online by Cambridge University Press:  17 February 2017

Satoko Mitani
Satoko Mitani*
Affiliation:
Kyoto Prefecrtural University of Medicine, Graduate School of Medical Science Kamigyo-ku, Kyoto 606-8566, Japan
*
465 Kajii-cho, Kawaramachi Hirokoji Kamigyo-ku, Kyoto 606-8566Japan E-mail: mitani@koto.kpu-m.ac.jp
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Abstract

Introduction:

The Impact of Event Scale Revised (IES-R) has been used in various epidemiological studies to assess the prevalence of post-traumatic stress disorder (PTSD). Previous studies using the IES-R Japanese version to assess the mental health of firefighters were based on the premise that firefighters had experienced a traumatic event(s) as a matter of course. However, use of the IES-R-J does not indicate whether or not a traumatic event was experienced. The purpose of this study is to clarify the differences between: (1) IES-R-J high and low score groups; and (2) those who report symptoms similar to those of PTSD with and without having been being exposed to a traumatic event.

Methods:

Questionnaire packets distributed to all 157 workers in a Japanese fire station included the IES-R, the Japan Brief Job Stress Questionnaire, a questionnaire regarding traumatic event experiences, and demographic questions. Participants who scored ≥25 points on the IES-R-J scale were defined as the PTSD high risk (HR) group; those with scores <25 points as the PTSD low risk (LR) group.

Results:

One hundred thirty-one of the 157 subjects (83.4%) responded to the questionnaire; three were excluded from the analysis because of missing data. The mean total IES-R-J score was 14.9 ±15.2. Twenty-eight subjects scored in the PTSD HR group (≥25); 100 scored in the LR group (<25). A total of 54 (42.2%) participants had experienced a traumatic event; 57.8% had not. In the HR group, 14 subjects had experienced a traumatic event and 14 had not. Participants who had experienced a traumatic event reported a higher incidence of intrusion/re-experience symptoms than did those who had not experienced a traumatic event. The level of social support significantly affected the risk for PTSD.

Firefighters who scored ≥25 on the IES-R-J and, thus, considered to be at high risk for the development of PTSD, were less confident about their health, experienced more job stressors and had less social support than did those whose IES-R-J scores were <25. Having experienced a traumatic event was reported by only 42% of all the participants and by only 50% of those in the high risk PTSD group.

Conclusions:

Although the IES-R is an easily-administered tool useful in epidemiological studies evaluating psychological stress, it is recommended that the questionnaire be amended to include a question regarding the existence of a threatened experience or event and to analyze the data using positive and negative predictive value methodology.

Keywords

firefightersImpact of Event Scalepost-traumatic stress disordersocial support
Type
Original Research
Information
Prehospital and Disaster Medicine , Volume 23 , supplement S1: Nursing Issues in Disaster Health , June 2008 , pp. s20 - s26
Copyright
Copyright © World Association for Disaster and Emergency Medicine 2008

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References

1. American Psychiatric Association 2000: Diagnostics and statistical manual of mental disorders (4th ed.) Washington DC. Available at http://www.mental-health-today.com/ptsd/dsm.htm.Google Scholar
2. Otsuka, T, Nakane, M, Matsushima, M et al: Encyclopedia of Clinical Psychiatry: S6 Posttraumatic Disorder. Tokyo: Nakayama-Shoten Co., Ltd. 2000;6–14. [in Japanese].Google Scholar
3. Hisatome, I: PTSD-Posttraumatic Counseling. 2d ed. Tokyo: Surigadai Publish Co., 2004, pp 128–129. [in Japanese].Google Scholar
4. Weiss, D: Psychometric Review of the Impact of Event Scale—Revised, in Measurement of Stress, Trauma, and Adaptation. Edited by Stamm, BH. Lutherville, Md, Sidran Press, 1996, pp 185–188.Google Scholar
5. Helzer, JE, Robins, LN, McEvoy, L: Post-traumatic stress disorder in the general population. N Engl J Med 1987;317:1630–1634.Google Scholar
6. Kessler, RC, Sonnega, A, Bromet, E, Hughes, H, Nelson, CB: Post-traumatic stress disorder in the national co-morbidity survey. Arch Gen Psychiatry 1995; 52:1048–1060.CrossRefGoogle Scholar
7. Wanger, D, Heinrichs, M, Ehlert, U: Prevalence of symptoms of posttraumatic stress disorder in German professional firefighters. Am J Psychiatry 1998;155:1727–1732.Google Scholar
8. David, A, Klein, S: Ambulance personnel and critical incident. Impact of accident and emergency work on mental health and emotional well-being. Br J Psychiatry 2001;178: 76–81.Google Scholar
9. Alexander, DA, Klein, S: Ambulance personnel and critical incident. Impact of accident and emergency work on mental health and emotional well-being. Br J Psychiatry 2001;178:76–81.Google Scholar
10. Kessler, RC, Borges, B, Walters, EE: Prevalence and risk factors of lifetime suicide attempts in the national co-morbidity survey. Arch Gen Psychiatry 1999;56:617–626.Google Scholar
11. Kawamura, N, Kim, Y, Asukai, N: Suppression of cellular immunity in men with a past history of posttraumatic stress disorder. Am J Psychiatry 2001;158: 484–486.Google Scholar
12. Horowitz, MJ, Wilner, N, Alverez, W: Impact of event scale; a measure of subjective stress. Psychosom Med 1979;41:209–218.Google Scholar
13. Sundin, EC, Horowitz, MJ: Impact of event scale: Psychometric properties. Br J Psychiatry 2002; 180: 205–209.Google Scholar
14. Asukai, N: Posttraumatic stress disorder (PTSD). Clinical Psychiatry 1999;28:171–177. [in Japanese].Google Scholar
15. Asukai, N, Kato, H, Kawamura, N et al: Reliability and validity of Japanese-language version of the impact of event scale-revised (IES-R): four studies of different traumatic events. J Nerv Ment Dis 2002;190:175–182.Google Scholar
16. Keane, TM, Scott, WO, Chavoya, GA, Lamparski, DM, Fairbank, JA: Social support in Vietnam veterans with posttraumatic disorder: A comparative analysis. J Consulting Clinical Psychology 1985;53:95–102.Google Scholar
17. Norris, FH, Kaniasty, K: Received and perceived social support in time of stress: A test of the social support deterioration model. J Personality and Social Psychology 1996;71:498–511.Google Scholar
18. Schutzwohl, M, Maercker, A: Effects of varying diagnostic criteria for posttraumatic stress disorder are endorsing the concept of partial PTSD. J Trauma Stress 1992;12: 155–165.Google Scholar
19. Sttler, ND, Preston, AJ, Kaiser, CF, Olivera, VE, Valdez, J, Schlueter, S: Hurricane George: A cross-national study examining preparedness, resource loss, and psychological distress in the U.S. Virgin Island, Puerto Rico, Dominican Republic, and the United States. J Trauma Stress 2002;15:339–350.CrossRefGoogle Scholar
20. Grea, S, Ahern, J, Resnick, H, Kilpatrick, D, Bucuvalas, M, Gold, J, Vlahov, D: Psychological squeal of the September 11 terrorist attacks in New York city. N Eng J Med 2002;346:982–987.Google Scholar
21. Schutzwohl, M, Maercker, A: Anger in former East German political prisoners. Relationship to posttraumatic stress reactions and social support. J Nerv Ment Dis 2000;188:483–489.Google Scholar
22. Pulcino, T, Galea, S, Ahern, J et al: Posttraumatic stress in women after the September 11 terrorist attacks in New York City. J Womens Health 2003;12: 809–820.Google Scholar
23. Joseph, S: Psychometric Evaluation of Horowitz's Impact of Event Scale: A Review. J Trauma Stress 2000;13:101–113.CrossRefGoogle ScholarPubMed