关键词： COVID-19 pandemic   College students   Post-traumatic stress disorder   Risk prediction models   HEALTH  

摘要： Background: To explore the risk factors of post-traumatic stress disorder (PTSD) among Chinese college students during the COVID-19 pandemic and the construction and validation of risk prediction models. Methods: A total of 10,705 university students were selected for the study. The questionnaire included the Generalized Anxiety Disorder 7 (GAD-7), Patient Health Questionnaire 9 (PHQ-9), PTSD Checklist for DSM-5 (PCL-5), and self-designed questionnaire. These assessments were conducted to facilitate the survey, construct the predictive model and validate the model's validity. Results: Sex, left-behind experience, poverty status, anxiety score, and depression score were identified as independent risk factors influencing psychological trauma among Chinese college students during the COVID-19 pandemic, while COVID-19 infection emerged as a protective factor against psychological trauma. A column chart was constructed to visualize the six independent risk factors derived from logistic regression analysis. The Hosmer-Lemeshow test results (chi 2 2 = 13.021, P = 0.111) indicated that the risk prediction model fitted well. The receiver operating characteristic (ROC) curve showed an area under the curve (AUC) of 0.864 in the model group and 0.855 in the validation group. The calibration curves of the model closely resembled the ideal curve. Decision curve analysis (DCA) revealed that the model provided net benefit and demonstrated good clinical utility. Limitations: The validation of the model is currently restricted to internal assessments. However, further confirmation through larger sample sizes, multicenter investigations, and prospective studies is necessary. Conclusions: The model effectively predicted PTSD risk among Chinese college students during the COVID-19 pandemic, indicating strong clinical applicability.

关键词： Pandemic   COVID-19   Mental health: healthcare workers   Rural   Resilience  

摘要： Drawing on resilience research in rural studies, this study examined the mental health experiences of frontline healthcare workers during two stages of the COVID-19 pandemic in rural Manitoba, Canada. Data were collected using online surveys from May to June 2020 (n = 137) and from May to June 2021 (n = 219). The surveys assessed symptoms of anxiety and identified strategies and barriers to addressing mental health concerns. Most respondents exhibited clinical symptoms of anxiety as measured by the GAD-7 scale. Respondents mostly accessed informal supports, such as family and friends, in the first survey in 2020, and a broader mix of informal and formal supports in the 2021 survey. In both surveys, numerous barriers to accessing formal mental health support were identified. Our findings suggest that although some degree of resilience in the face of the pandemic was prevalent in rural areas, there is a need for accessible professional and peer mental health support for frontline healthcare workers. The research also highlights the importance of context and resources in sustaining the healthcare workforce in rural areas as part of the pandemic response.