The results showed that 83.2% of the participating nurses (287 samples) were female, 80% were married (276 samples), and 69.9% (241 samples) had official employment status. Moral sensitivity had a positive significant relationship with age and work experience and a negative significant relationship with overtime per month (
Table 1).
Missed nursing care had a significant relationship with education, department of activity, and having a second job (
Table 2).
In investigating the moral sensitivity of nurses, the mean score of moral sensitivity was found to be 70.75 ± 10.83 (
Table 3).
Findings related to MNC showed that the total mean and standard deviation of MNC were 33.93 ± 10.35. The highest average MNC was related to "supervising the preparation of food for a patient who can eat by himself," with an average of 1.97, and "doing oral care," with an average of 1.92, respectively.
In the prediction of MNC based on the components of nurses’ moral sensitivity, the results showed that the features of moral sensitivity of nurses explain 0.4% of MNC. The path coefficient of independent to dependent components is equal to 1.574. This value represents the Pearson correlation between the features and the variable (
Table 4).
There is a significant inverse relationship between moral sensitivity and missed care. Professional knowledge, experience of moral dilemmas and conflicts, respect for client independence, honesty, and benevolence predict missed care. Significant relationships were found between age, amount of overtime, second job, work experience, department, and education with missed care (
Table 5).
This study revealed that nurses exhibited a moderate level of moral sensitivity, consistent with findings from other studies conducted in Iran and elsewhere (
19,
20). Mousavi et al. indicated medium to high levels of moral sensitivity among students and nurses at Aja University (
21), whereas Filipova suggested that nurses lacked sufficient moral sensitivity for decision-making (
22). These discrepancies in reported results suggest that various factors may influence nurses' moral sensitivity, including workplace conditions, overtime, work experience, departmental dynamics, and the extent of nursing care (
23). Research indicates that higher levels of moral sensitivity among nurses correlate with improved quality of nursing care (
24). The average level of moral sensitivity among nurses reflects their relative emphasis on adhering to ethical principles in patient care. Therefore, it is imperative for nurses to enhance their understanding of nursing ethics. Among the dimensions of moral sensitivity, the highest score was attributed to "honesty and benevolence," while the lowest score was associated with "professional knowledge." This finding aligns with the results reported by Abdou, wherein the dimension of honesty and benevolence received the highest score among moral sensitivity dimensions, consistent with the current study (
5). In the study by Comrie, the highest score was related to the field of "applying moral concepts," and the lowest score was related to the field of "experiencing moral problems and conflicts" (
19). The professional knowledge dimension of moral sensitivity refers to cases where decisions are made without the patient’s participation. The results of the present study also showed that nurses obtained the lowest score in the professional knowledge dimension. Not paying attention to the patient’s autonomy and the idea that the treatment team must help the patient’s decision-making are still neglected. Nurses participate less in their patients' treatment and care decisions. Additionally, the findings related to the determination of MNCs showed that the occurrence of MNCs in this research also exists like other research conducted worldwide. The highest mean associated with MNC was related to "supervising the preparation of food for a patient who can eat by himself" and "doing oral care." Also, the lowest mean was related to the statement "General evaluation of the patient in each work shift" and "Evaluation and care of the peripheral and central venous routes of the patient." The results of Cho et al.’s research in Seoul regarding the effect of increasing nursing staff on unperformed nursing care are consistent with our study. They showed that monitoring meals and movement, oral care, bathing, and skincare preparation are part of the MNC (
25). The study by Kalisch in America showed that "changing the patient’s condition," "cooperation and supervision of going to the toilet in the first 15 minutes of the request," and "participating in interdisciplinary patient care conferences" are the most MNCs (
17). We can attribute the differences in management and educational systems, as well as the variance in care styles across the studied departments, to explain the disparities observed in the types of MNC. Regarding the prediction of MNCs based on the components of moral sensitivity and related factors, the results indicated that nurses’ moral sensitivity components account for 0.4% of MNCs. Essentially, as nurses' moral sensitivity increases, MNC decreases, and vice versa. Additionally, components such as professional knowledge, experience of moral dilemmas, respect for client autonomy, honesty, and benevolence showed significant correlations with missed care. However, components like awareness of communication with the patient and application of ethical concepts in decision-making did not exhibit significant correlations. The highest correlation was noted with experiencing moral dilemmas and conflicts, while the lowest was observed with respect for client autonomy. Although nurses' clinical behaviors partly reflect their moral sensitivities, the research underscores the presence of other contributing factors to missed care, warranting further investigation. Policymakers and researchers in the healthcare system must take heed of these factors. Among the demographic variables, a statistically significant relationship was found between overtime and second jobs with moral sensitivity, indicating that nurses with increased overtime and workload experienced more missed care and received lower scores in moral sensitivity. Dehghani et al. also identified the frequency of work shifts and fatigue resulting from overtime as significant barriers to nurses' adherence to professional ethical standards (
26). Extended weekly working hours lead to fatigue and dissatisfaction among nurses, resulting in reduced sensitivity to ethical issues. High workload can foster indifference and diminish nurses' performance. Additionally, a statistically significant correlation was observed between nurses' work experience and missed care, indicating a decrease in missed care with increasing work experience. As nurses age and accumulate more experience, they develop greater clinical skills and moral sensitivity, resulting in enhanced accuracy in care provision. Lutzen et al. demonstrated that nurses' moral sensitivity increases with greater work experience (
27), a finding consistent with the results of this study. However, studies by Abbaszadeh et al. and Izadi et al. did not reveal a statistically significant relationship between moral sensitivity and work history (
20,
28). In justifying these differences, it can be stated that moral sensitivity tends to increase with accumulating work experience when it is accompanied by ongoing learning, experience growth, and knowledge development. This trend arises because if work experience doesn't coincide with continuous education, there's a possibility that monotony and routine tasks might decrease nurses' sensitivity and their ability to handle new ethical challenges, thus weakening their decision-making skills (
20). Considering the influence of organizational and environmental factors, disparities in the research settings between these two studies could contribute to these differences. Additionally, due to the limitation in sample size, caution is warranted when extrapolating the results to other populations.