The purpose of this study was to predict mental health by religious orientation and the mediating role of death anxiety among nurses in the COVID-19 pandemic. The findings showed that more than half of nurses experience high death anxiety. Women had higher death anxiety than men. Intrinsic religious orientation had a direct and significant correlation with all dimensions of mental health. Extrinsic socially-oriented religiousness was inversely and significantly correlated with the dimensions of physical symptoms, anxiety symptoms, and sleep disorders, but extrinsic personally oriented religiousness was not significantly correlated with mental health. All dimensions of mental health had a significant inverse correlation with death anxiety. Dimensions of fear of death and passing time and short life were able to predict changes in the subscale of physical symptoms and the subscale of anxiety symptoms and sleep disorders. Dimensions of fear of pain and illness and passing time and short life were able to predict changes in the subscale of social functioning. Dimensions of passing time and short life and fear of future were able to predict subscale of changes in depressive symptoms.
Death anxiety scores were significantly different in different marital statuses, education levels, and wards. These results were not found in demographic variables and death anxiety in a study by Moudi et al [26]. However, some studies had different results and showed that nurses with younger ages and working in intensive care units experience more death anxiety [27, 28]. This difference could be related to the type of disease and the epidemic, because the COVID-19 pandemic affected all age groups, all departments of the hospital, and caused a great deal of fear among healthcare professionals.
The findings of this study showed that the dimensions of death anxiety can predict changes in the dimensions of mental health in nurses during the COVID-19 pandemic. These findings were also observed in other studies [26, 29]. Anxiety can endanger health by affecting physical and mental functions [30]. Constant exposure to the patients, responsibility for human health, clinical procedures, and dealing with dying patients and emergencies can reduce the optimal performance of nurses [31]. Death anxiety is one of the stresses experienced by nurses in the workplace [32]. This problem is exacerbated during the COVID-19 epidemic because of problems such as the absence of effective prevention and treatment, along with high infection rates, but all healthcare professionals at risk. According to reports, healthcare workers experience 56% of work stress and anxiety during the COVID-19 pandemic [33].
In this study, the intrinsic religious orientation had a negative effect on death anxiety but the extrinsic socially-oriented religiousness increased death anxiety and the extrinsic personally oriented religiousness had no effect on death anxiety. The religious orientation sometimes reduces death anxiety, but this should change one's attitude toward change, and only intrinsic religious orientation can change attitudes [34]. Explaining this finding, it can be said that one of the results of panic management theory is related to fear of death. A common feature in the worldview of people who believe in heavenly religions is the assurance of the existence of a kind of life after death; one of the most important functions of religion is to reduce the panic associated with one's mortality. Given that all the nurses participating in this study were Muslims and believed in eternal life after death, this belief could lead to a reduction in their death anxiety.
The results of this study showed that the intrinsic religious orientation had a positive effect on mental health but the extrinsic socially-oriented religiousness had a negative effect on mental health and the extrinsic personally oriented religiousness had no effect on mental health. In another study, the effect of both intrinsic and extrinsic dimensions of religious orientation was positive on reducing symptoms of anxiety and depression [35]. In general, the relationship between religiosity and psychological well-being can be complex. Contradictory findings illustrate this complexity; as for the intrinsic religious orientation, having meaning and purpose in life, feeling of belonging to a high source, hoping for God's help in difficult life situations and consequently being optimistic in these situations and so on are resources for religious people to suffer less psychological damage in the face of stressful life events. This difference may be because the majority of people believe in Islam in Iran, the effects of extrinsic socially-oriented religiousness on individuals have decreased and only the effects of extrinsic personally oriented religiousness can lead to mental health. The intrinsic religious orientation can lead to a sense of comfort and mental health by creating a worldview of life after death and establishing a positive relationship with God [36], but the extrinsic religious orientation is mostly aimed at gaining group support and has little effect on a person's attitude and feelings.
The study limitations were the cross-sectional design, the small sample size, and the study area only in one city, which reduces the generalizability of the findings but can be a basis for knowledge and comparison for healthcare decision-makers and other studies.