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. 2022 Sep 10;22(1):603.
doi: 10.1186/s12888-022-04216-3.

Latent classes of posttraumatic stress disorder among survivors of the Bam Earthquake after 17 years

Elham Abolhadi  1 , Parisa Divsalar  2 , Mohammad Amin Mosleh-Shirazi  3   4 , Tania Dehesh  5
Affiliations

Latent classes of posttraumatic stress disorder among survivors of the Bam Earthquake after 17 years

Elham Abolhadi et al. BMC Psychiatry. .

Abstract

Background: The purpose of this study was to identify latent classes of the severity of post-traumatic stress disorder (PTSD) among the survivors of the earthquake in Bam, south-eastern Iran, 17 years after the disaster. The most influential predictor variables of PTSD classes were also investigated.

Methods: Eight hundred survivors of the Bam earthquake who were at least four years old in that disaster were selected by multistage sampling. The PTSD Checklist-Civilian Version was used. Latent class analysis was performed to identify subgroups of people with different PTSD symptom profiles. Latent class regression analysis was used to explore the influence of demographic and traumatic variables on each class membership.

Results: We found three latent classes of PTSD, with the following profiles emerging: Low Symptom (56.6% of the participants), Moderate Symptom (23.5%), and Severe Symptom (19.9%). Old age [OR = 2.20, 95% CI = (1.46, 3.32)], physical injury [OR = 1.95, 95% CI = (1.24, 3.06)], being trapped under the rubble [OR = 1.81, 95% CI = (1.15, 2.86)], and death of a family member [OR = 1.86, 95% CI = (1.12, 3.09)] were positive risk factors for PTSD and increased the chance of being in classes having more severe symptoms. Having a high educational level was a negative risk factor [OR = 0.86, 95% CI = (0.67, 1.11)].

Conclusions: The severity of PTSD 17 years after the earthquake shows that natural disasters such as earthquakes have long-term consequences, and earthquake survivors must have psychological support and long term health care. After any catastrophic earthquake, governments should establish psychology and psychotherapy centers for earthquake victims, and these centers should support earthquake victims for a sufficiently long time.

Keywords: Bam; Earthquake; Latent class analysis; Post-traumatic stress disorder; Risk factors.

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Conflict of interest statement

The authors declare that they have no competing interests.

Figures

Fig. 1
Fig. 1
Predicted probabilities of latent class membership at varying levels of age
Fig. 2
Fig. 2
Predicted probabilities of latent class membership at varying levels of education
See this image and copyright information in PMC

References

    1. Sadeghi-Bazargani H, Azami-Aghdash S, Kazemi A, Ziapour B. Crisis management aspects of bam catastrophic earthquake. Health promotion perspectives. 2015;5(1):3. doi: 10.15171/hpp.2015.002. - DOI - PMC - PubMed
    1. Organization WH. WHO joins international effort to help Bam earthquake survivors. Bull World Health Organ. 2004;82:156. - PMC - PubMed
    1. Montazeri A, Baradaran H, Omidvari S, Azin SA, Ebadi M, Garmaroudi G, et al. Psychological distress among Bam earthquake survivors in Iran: a population-based study. BMC Public Health. 2005;5(1):4. doi: 10.1186/1471-2458-5-4. - DOI - PMC - PubMed
    1. Eisma MC, Lenferink LIM, Chow AYM, Chan CLW, Li J. Complicated grief and post-traumatic stress symptom profiles in bereaved earthquake survivors: a latent class analysis. Eur J Psychotraumatol. 2019;10(1):1558707. doi: 10.1080/20008198.2018.1558707. - DOI - PMC - PubMed
    1. Heron-Delaney M, Kenardy J, Charlton E, Matsuoka Y. A systematic review of predictors of posttraumatic stress disorder (PTSD) for adult road traffic crash survivors. Injury. 2013;44(11):1413–1422. doi: 10.1016/j.injury.2013.07.011. - DOI - PubMed