The incidence of post-traumatic stress disorder among survivors after earthquakes:a systematic review and meta-analysis

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Background:
Post-traumatic stress disorder (PTSD) is a common psychological disorder caused by unusual threats or catastrophic events. Little is known about the combined incidence of PTSD after earthquakes. This study aimed at evaluating the combined incidence of PTSD among survivors after earthquakes using systematic review and meta-analysis.

Methods:
The electronic databases of PubMed, Embase, Web of Science and PsycARTICLES were searched for relevant articles in this study. Loney criteria were used to assess the quality of eligible articles. The combined incidence of PTSD was estimated by using the Freeman-Tukey double arcsine transformation method. Subgroup analyses were conducted using the following variables: the time of PTSD assessment, gender, educational level, marital status, damage to one’s house, bereavement, injury of body and witnessing death.

Results:
Forty-six eligible articles containing 76,101 earthquake survivors met the inclusion criteria, of which 17,706 were diagnosed as having PTSD. Using a random effects model, the combined incidence of PTSD after earthquakes was 23.66 %. Moreover, the combined incidence of PTSD among survivors who were diagnosed at not more than 9 months after earthquake was 28.76 %, while for survivors who were diagnosed at over nine months after earthquake the combined incidence was 19.48 %. A high degree of heterogeneity (I² = 99.5 %, p<0.001) was observed in the results, with incidence ranging from 1.20 to 82.64 %. The subgroup analyses showed that the incidence of PTSD after earthquake varied significantly across studies in relation to the time of PTSD assessment, gender, educational level, damage to one’s house, bereavement, injury of body and witnessing death. However, stratified analyses could not entirely explain the heterogeneity in the results.

Conclusions:
Given the high heterogeneity observed in this study, future studies should aim at exploring more possible risk factors for PTSD after earthquakes, especially genetic factors. In spite of that, the results of this study suggest that nearly 1 in 4 earthquake survivors are diagnosed as having PTSD. Therefore, the local government should plan effective psychological interventions for earthquake survivors.

Keywords:
Post-traumatic stress disorder, Earthquake, Incidence, Systematic review, Meta-analysis

Autoři: Wenjie Dai ¹; Long Chen ^1,2; Zhiwei Lai ¹; Yan Li ¹; Jieru Wang ^1,3; Aizhong Liu ^1*
Působiště autorů: Department of Epidemiology and Health Statistics, School of Xiangya Public Health, Central South University, Changsha, China. ¹; Zhuhai Center for Disease Control and Prevention, Zhuhai, China. ²; Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, USA. ³
Vyšlo v časopise: BMC Psychiatry 2016, 16:188
Kategorie: Research Article
prolekare.web.journal.doi_sk: https://doi.org/10.1186/s12888-016-0891-9

© 2016 The Author(s).
Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
The electronic version of this article is the complete one and can be found online at: https://bmcpsychiatry.biomedcentral.com/articles/10.1186/s12888-016-0891-9

Souhrn

Keywords:
Post-traumatic stress disorder, Earthquake, Incidence, Systematic review, Meta-analysis

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