To the best of our knowledge, this was the first cross-sectional study that examined the relationship among workplace interpersonal problems, psychological distress, and turnover intentions in elderly care workers. The results showed that workplace interpersonal problems had a significant positive overall effect on turnover intentions. This finding is consistent with previous reports that workplace relationships are associated with turnover intentions [17, 35]. In particular, a study of healthcare workers showed a negative association between workplace social capital and turnover intentions, even after controlling for work-related factors [36]. Workplace social capital includes a vertical dimension (relationship between employees and their employer or supervisor) and a horizontal dimension (social contact, cooperation, and trust among coworkers) [37] and strongly reflects interpersonal relationships in the workplace. Thus, workplace interpersonal problems are an important predictor of care workers’ intentions to leave their jobs. Conversely, the results support our hypothesis by showing that some workplace interpersonal problems have a stronger direct effect on turnover intentions, whereas others have a stronger mediating effect on turnover intentions through psychological distress. These findings suggest that different workplace interpersonal problems should be targeted for intervention to reduce turnover intentions among care workers.
First, a sense of unfair workload, insufficient communication, and different attitudes to care work had large positive direct effects on turnover intentions in models 1 and 2. Of these, a sense of unfair workload and insufficient communication had the largest effects on turnover intentions. The sense of unfair workload suggests dissatisfaction because of differences in workload among care workers, which means that supervisors cannot manage the workload properly and care workers have difficulty cooperating [17]. Satisfaction with supervisors is negatively related to the turnover intentions of care workers [38]. In addition, better leadership increases the affective organizational commitment of care workers [39], and higher affective organizational commitment lowers the turnover intentions of elderly care workers [19]. Thus, the sense of unfair workload held by individual care workers, which is related to their supervisor’s management, appears to have a direct influence on turnover intentions. Conversely, differential attitudes to care, such as conflicting goals, hinder communication [40, 41]. The different attitudes to care work, which was found to have a direct effect on turnover intentions, would result in insufficient communication. A study of nurses showed that workplace communication is a protective factor for job retention intentions [42]. Insufficient communication lowers the perception of teamwork in the workplace; however, older adult care workers were found to have higher perceptions of workplace teamwork lower turnover intentions [18]. In summary, insufficient communication can be a direct factor that increases turnover intentions among care workers. These results suggest that improving the sense of unfair workload, insufficient communication, and different attitudes to care work among workplace interpersonal problems can reduce turnover intentions of care workers and may be an effective means of securing the caregiving workforce.
Second, difficulty guiding subordinates/new staff, labeling, and bullying had large mediating effects on turnover intentions through psychological distress in model 1. In model 2, the direct and mediating effects of bullying on turnover intentions were similar; however, difficulty in guidance for subordinates/new staff and labeling exerted a significant mediating effect on turnover intentions through psychological distress. Because of the high turnover rates of care workers and the severe labor shortage in Japan [22, 43], new staff are expected to join older adult care facilities each year. In Japan, older adult care facilities allow people to enter the caregiving profession without having specialized knowledge or skills [22]. As a result, senior care workers already working there must provide fairly extensive guidance to new staff and subordinates. In addition to being busy with their daily duties, partly due to manpower shortage, care workers may feel quite overwhelmed in guiding new staff and subordinates. Labeling is a cognitive distortion in which people in the workplace are labeled negatively [17]. Cognitive distortions affect social adjustment through psychological distress such as depressive symptoms [44]. Based on these findings, negative views of workplace staff through labeling may mediate psychological distress, making workplace adjustment more difficult and increasing turnover intentions. In the model adjusted for basic attributes, bullying had equal direct and mediating effects on turnover intentions. This suggests that bullying can be a direct factor in increasing turnover intentions or a mediating factor in psychological distress leading to turn over intentions. To support this finding, a review of nursing staff reported that bullying causes psychological distress and increases the likelihood of isolation from colleagues [45]. Thus, improving workplace interpersonal problems such as difficulty guiding subordinates/new staff, labeling, and bullying is effective in preventing psychological distress among nursing staff and subsequently the intentions to leave the nursing profession. This will also help reduce turnover intentions of care workers in the long run.
This study had some limitations. First, owing to the cross-sectional design, we could not determine the causal relationship among workplace interpersonal problems, psychological distress, and turnover intentions. Second, the valid response rate was not high (31.3%), and selection bias may have affected the results of this study. Future studies should include a longitudinal investigation of a greater number of care workers in older adult care facilities.