{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,26]],"date-time":"2025-11-26T11:50:41Z","timestamp":1764157841419,"version":"3.46.0"},"reference-count":110,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2025,11,26]],"date-time":"2025-11-26T00:00:00Z","timestamp":1764115200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJERPH"],"abstract":"<jats:p>Internally displaced persons (IDPs) face severe physical, emotional, and social challenges due to conflict, climate change, and other crises. Ethiopia has the highest number of IDPs in Africa, primarily due to ethnic conflicts and climate-related disasters, placing them at a high risk for post-traumatic stress disorder (PTSD) and psychological distress (anxiety, emotional well-being, and depression, referred to as mental health (MH)). This study examines PTSD\u2019s direct predictive role on IDPs\u2019 (MH) in Debre Berhan Town, Ethiopia, the mediating role of psychological capital (PsyCap), and the moderating role of perceived social support (PSS). It also explores the interaction between PSS and PsyCap in the PTSD and MH relationship. A sample of 273 IDPs (129 females, 144 males) was selected using simple random sampling from a total population of 19,349 IDPs. Data were collected using validated instruments, including the PTSD Checklist-Civilian Version (PCL-C), PsyCap, PSS, and the General Health Questionnaire (GHQ). A structural equation modeling (SEM) analysis revealed that PTSD significantly and negatively predicts the MH of IDPs. Additionally, PsyCap positively influences their mental well-being and partially mediates the relationship between PTSD and depressive symptoms. Furthermore, PSS moderates the PTSD and MH relationship, reducing its negative impact. The finding concludes that despite PTSD directly predicting the MH of IDPs, PsyCap helps mitigate these effects. Key components of PsyCap, including hope, resilience, self-efficacy, and optimism, buffer the adverse effects of PTSD on MH. IDPs with stronger psychological resources are less likely to experience psychological distress. PSS further weakens PTSD\u2019s negative impact, as individuals with higher PSS are less likely to suffer from trauma-related distress or depression after displacement. This study highlights the importance of PsyCap in enhancing the mental well-being of IDPs. Future research should expand on these findings and explore the integration of PsyCap-based interventions into IDP mental health programs. Strengthening social support can also provide vital support in helping IDPs cope with trauma and improve their overall psychological health.<\/jats:p>","DOI":"10.3390\/ijerph22121788","type":"journal-article","created":{"date-parts":[[2025,11,26]],"date-time":"2025-11-26T11:43:22Z","timestamp":1764157402000},"page":"1788","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Unpacking Post-Traumatic Stress Disorder and Mental Health in Internally Displaced Persons: A Mediation-Moderation Model of Psychological Capital and Perceived Social Support"],"prefix":"10.3390","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0009-0001-3455-4680","authenticated-orcid":false,"given":"Adane Kefale","family":"Melese","sequence":"first","affiliation":[{"name":"Department of Psychology, College of Education and Behavioral Sciences, Woldia University, Woldia Town P.O. Box 400, Ethiopia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2025,11,26]]},"reference":[{"key":"ref_1","unstructured":"Idmc, N. (2019). Global Report on Internal Displacement 2019, Internal Displacement Monitoring Centre (IDMC)."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"102793","DOI":"10.1016\/j.gloenvcha.2023.102793","article-title":"Emergent network patterns of internal displacement in Somalia driven by natural disasters and conflicts","volume":"84","author":"Oh","year":"2024","journal-title":"Glob. Environ. Change"},{"key":"ref_3","unstructured":"Amna Adrees, M. (2022). Refugees: The Past, Present, and Future, Department of Family Medicine, University of Virginia. 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