Background
In the context of the increasing complexity of today’s healthcare system, nurses play a more and more indispensable and important part of healthcare [
1]. The nursing profession is characterized by high work intensity, long working hours, and high occupational risk [
2], which brings tremendous physical and mental stress to nurses and leads to burnout [
3] and escalation of nurses’ turnover rate [
4]. Currently, the global nursing shortage is estimated to be 5.9 million. To effectively address this challenge, it is crucial not only to reduce the turnover rate of existing nursing staff but also to increase the number of nursing graduates by 8% annually [
5]. In this context, the fostering and strengthening of the mental health of nursing undergraduates is not only critical to their academic achievement, but also has a direct impact on the sustainability of their careers.
Sense of coherence (SOC), which refers to an individual’s tendency to perceive life as relatively stable, including the dimensions of comprehensibility, controllability, and meaningfulness, is a central concept in the model theory of beneficial health proposed by psychologist Antonovsky [
6,
7]. In the face of unexpected or stressful situations, individuals with a high SOC are more inclined to understand and cope with stress, more willing to view life events as explicable and logical, and thus are able to successfully manage them [
8], thereby maintaining their health [
7]. Colomer et al.‘s research indicates that high levels of SOC among nursing assistant students are associated with the motivation to achieve high academic performance and seem to be more conducive to enhancing students’ stress resistance [
9]. Several studies have pointed out that the SOC is significantly negatively to willingness to leave, and that a higher SOC can reduce the psychological stress of nurses [
10] and decrease the phenomenon of nurse burnout [
11]. The role of SOC in promoting health and well-being has now been demonstrated in numerous studies, but this research has rarely been presented to nursing undergraduates.
Nursing undergraduate education, as a four-year bachelor’s degree programme, is committed to producing nurses with a solid professional theoretical foundation, clinical skills and a deep humanistic caring spirit. Compared with other disciplines, nursing undergraduates, while mastering basic medical knowledge and skills training, are also required to undertake heavy clinical practice, which poses a more serious challenge to their mental health [
12]. A scoping review by Urtubiaand et al. indicated that a SOC is a crucial element in the mental health of healthcare professionals and students, facilitating resilience to stress [
13]. Similar results were obtained in the study of SOC among dental students by Silva et al. [
14]. As a protective factor for the occupational health of healthcare-related professionals, sense of coherence is an important indicator of individual mental health and has a profound impact on the occupational adaptation of nursing undergraduates [
15]. Nevertheless, the current status of SOC among nursing undergraduates and the potential heterogeneity within this group remain uncertain.
The meaning of life pertains to the process of determining life’s purpose through reflection on one’s values and goals [
16], and it directly reflects the “meaning” dimension within the SOC [
17]. Emphasising life education for nursing students not only promotes their respect and reverence for life, but also helps to cultivate their concern for and understanding of patients’ spiritual needs [
18]. Research by Qiu et al. has confirmed that nursing students with a stronger sense of life meaning have a stronger sense of professional identity than those with a weaker sense of life meaning [
19]. A meta-analysis of cancer patients demonstrated that both the meaning of life and SOC are crucial for psychological adjustment [
20]. However, existing studies have predominantly focused on the role of meaning of life in cancer patients [
20], PTSD [
21] and other populations [
17]. The impact of meaning of life on the SOC among nursing undergraduates remains an area requiring further investigation.
Professional identity, a personal factor closely related to SOC, is defined as an individual’s self-affirmation of occupation [
22]. For nursing undergraduates, the development of professional identity involves a dynamic transition from being a student to adopting the role of a nurse [
23]. Research indicates that a strong sense of professional identity not only enhances nursing undergraduates’ engagement in learning and retention in the nursing profession but also strengthens nursing undergraduates’ sense of professional mission [
15]. Zhang et al. have noted that SOC, as a positive psychological resource, can serve as a moderating variable in the relationship between professional identity and nurses’ overall well-being [
22]. However, the interplay between professional identity and meaning in life remains unclear, and there is limited understanding of how professional identity, meaning in life, and their interplay benefit SOC, particularly among nursing undergraduates.
Nursing undergraduates are faced with the dual challenges of academic pressure and career planning. How to understand the role and interrelationship of these psychological factors in nursing undergraduates is still a topic that needs to be explored deeply. However, Existing studies on nursing undergraduates’ SOC have predominantly focused on overall coherence levels, using aggregate scores from scales to assess coherence without considering individual variations. To address these gaps, latent profile analysis (LPA) presents a more suitable method. LPA is an ‘individual-centred’ method of identifying potential heterogeneity within a group, which allows for the detection of latent variables that cannot be directly measured by traditional means, The ability to identify groups of nursing undergraduates in different psychological states [
24]. Thus, this study aims to identify distinct subgroups of nursing undergraduates’ SOC and analyze the influencing factors for these subgroups. This approach will facilitate the development of targeted interventions to enhance their SOC and provide a scientific basis for personalized educational strategies in nursing programs.
Our research questions in this study are as follows:
(1) What categories can the SOC among nursing undergraduates be classified into? (2) What are the characteristics of nursing undergraduates who exhibit lower levels of SOC? (3) How do sociodemographic characteristics and personal factors, such as professional identity and meaning in life, affect the different subgroups of nursing undergraduates?
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