Among natural disasters, earthquake is associated with heavy fatalities and financial damages, causing considerable mortality. The complications resulting from getting trapped in rubble, secondary traumas, obligation to reside in temporary shelters, along with other factors such as limited mobility, stress, and dehydration, predispose earthquake survivors to Deep Vein Thrombosis (DVT). The aim of the present study is to investigate the rate of DVT after an earthquake using a systematic review and meta-analysis.

To perform the present study, the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guideline was used. The protocol of this review study has been registered in the International Perspective Register of Systematic Review (PROSPERO) with the code of CRD42021290375. Credible data resources including PubMed, Scopus, Web of Science, Science Direct, Google Scholar, Magiran, SID, and Embase were used for extracting relevant studies. Random effect model was used to perform the meta-analysis. I2 was ritualized to investigate heterogeneity across the studies. Publication bias of studies was evaluated using the Begg test.

In this study, 267 primary studies were identified and extracted. After removing the duplicate ones and the screening, eventually 12 final studies were chosen for the meta-analysis. Based on the meta-analysis results, the total rate of DVT was 9.07% (95% confidence interval [CI]: 7.32-10.81; I2 = 97.9%; P = 0<0.001). Analysis of DVT in the subgroups of the general population and patient survivors were 11.43% (95% CI: 9.06-13.79; I2 = 98%; P = 0<0.001) and 2.51% (95% CI: 0.04-4.63; I2 = 77.7%; P = 0.001). Also, based on the Begg test, the publication bias in the chosen studies was not considerable.

DVT rate in earthquake survivors is higher compared with other disasters, and over time it finds a growing trend. After earthquake, the focus of rescue and health-care teams is on individuals with observable injuries and damages. Because DVT is first asymptomatic but has fatal consequences, including pulmonary embolism and sudden death, it should be incorporated in health’s status assessment of earthquake-stricken people as well as screening and diagnostic programs of health-care providers.

Floods are one of Iran’s most important natural hazards, which cause a lot of damage every year. Various organizations, including non-governmental organizations (NGOs), participate in flood management. The present study aimed to explore the challenges and barriers of NGOs’ participation in the management of the flooding in Iran based on stakeholders’ experiences.

This qualitative study is a case study that was conducted using the content analysis approach. Fifteen participants, including 3 national managers, 2 volunteers active in responding to recent floods, and 10 NGO managers/secretaries who had the knowledge or operational experience of participating in disaster management, were approached for interviews. Data were collected using a purposeful sampling method and continued until reaching data saturation.

Challenges and barriers to NGOs’ participation in flood management were categorized into 4 main categories and 14 subcategories, including policy-making challenges, managerial challenges, executive challenges, and socio-cultural challenges.

As multiple NGOs take part in responding to disasters and performing relief operations, establishing a unified command and supervision system for effective coordination and collaborations among NGOs and other stakeholders is highly suggested. Further research is needed to develop a measurement tool for assessing the effectiveness of NGOs’ activities during disasters.