4.2. Moral Distress Scale Results
The overall Cronbach’s alpha for the MMD-HP scale was 0.938, indicating very high reliability. The mean values for individual questions ranged from 0.57 to 2.35, indicating that certain situations (e.g., questions 5, 10, 16, and 19) are experienced significantly more often than others. This leads to the conclusion that certain professional conflicts and dilemmas are a regular reality for nurses, while other situations (e.g., questions 6, 12, and 26) are less common.
The highest mean values were observed in questions 5 (M = 2.35), 16 (M = 2.18), 10 (M = 2.11), and 19 (M = 2.26). These items reflect clinically and emotionally complex situations in which nurses find themselves at the crossroads of ethical pressure or conflicting decisions. These questions can serve as key indicators for risk assessment if the scale is to be used in clinical practice.
The corrected item-total correlation scores are above 0.5 in most cases, indicating good coherence between items and the overall scale. The highest correlation with the overall scale was for question 24 (r = 0.768), and the lowest was for question 10 (r = 0.160), suggesting that this question is structurally or substantively inconsistent with the other items.
Similarly, the “Cronbach’s Alpha if Item Deleted” values for all items range from 0.933 to 0.943, indicating that the deletion of any item would not have a significant positive impact on the overall reliability of the scale. This further confirms the internal stability and psychometric quality of the scale.
Table 1 presents the top five items with the highest item-total correlations and mean frequency scores, highlighting those most relevant to ICU nurses’ moral distress in the Latvian context.
A full item-level breakdown for all 27 items, including descriptive and psychometric statistics, is provided in
Supplementary Materials.
Overall, the results of the “frequency” dimension show that Latvian ICU nurses encounter morally difficult situations relatively frequently in their daily work, and this frequency can be accurately assessed by the tool used. This scale is not only statistically valid but also clinically informative, allowing for the identification of the most common sources of moral distress, which can serve as a basis for the targeted development of preventive mechanisms.
In addition to frequency, the second part of the moral distress scale assesses the emotional intensity that nurses feel when they are in certain professional and ethical situations. The Cronbach’s alpha of the scale was 0.976, indicating excellent internal consistency. The overall mean score of the scale was M = 94.30, with a standard deviation SD = 40.03 and standard error SE = 1.61, while the spread of scores ranged from 0 to 97, indicating a very wide range of emotional responses among respondents. This shows that some nurses experience very low emotional impact, while for others, the situations cause significant psychological stress.
The mean values of the items ranged from 1.54 (question 21) to 2.63 (question 16). Similar to the frequency dimension, some situations (e.g., questions 5, 8, 9, 14, and 24–27) were assessed as particularly emotionally influential, with average scores above 2.4 points. These questions reflect ethically complex or emotionally stressful clinical situations, such as acting contrary to one’s values, limited options for action, or conflict situations with doctors or management.
The corrected item-total correlation was higher than 0.54 in all cases, exceeding 0.80 in most cases, indicating good coherence between items and the overall scale. The highest correlations with the total score were observed for questions 24–26 (e.g., r = 0.855 and higher), which may indicate their particular importance in determining the emotional intensity of distress.
Similarly, the “Cronbach’s Alpha if Item Deleted” values remain very high in all cases (between 0.975 and 0.976), confirming that the deletion of any item would not provide a significant benefit to overall reliability. This indicates the stability of the scale and no need for content adjustments from a statistical point of view.
Table 2 presents the top five items with the highest item-total correlations and mean intensity scores, highlighting those most relevant to ICU nurses’ moral distress in the Latvian context.
A full item-level breakdown for all 27 items, including descriptive and psychometric statistics, is provided in
Supplementary Materials.
These results confirm that the emotional intensity of moral distress among Latvian ICU nurses is clearly felt and varies across different situations. The high internal reliability of the scale and high correlation scores allow this dimension to be used both for identifying individual distress patterns and for developing policy and preventive measures, such as targeted support programs, particularly in distressing clinical situations.
4.3. Copenhagen Burnout Inventory Results
To assess the phenomenon of burnout among intensive care nurses, a Latvian adaptation of the CBI [
41] was used, consisting of three subscales: personal-related burnout (PRB), work-related burnout (WRB), and client-related burnout (CRB) dimensions. The overall internal consistency (Cronbach’s alpha) was 0.928, indicating excellent internal reliability for the entire set of burnout scales.
Table 3 presents the top five items with the highest mean scores, illustrating the most frequently experienced burnout symptoms among respondents. The full item-level psychometric overview for all 19 items is available in
Supplementary Materials.
Total CBI scores across the scale were 37.59 out of a possible 76 points, or approximately 49.5% on a percentage scale, indicating a moderate level of burnout among ICU nurses in Latvia. This maximum value of 76 points represents the raw total score across all items. It is important to note that while some studies present CBI scores as percentages based on item-level transformations to a 0–100 scale, in this study, we opted for raw total scores to maintain comparability with our instrument’s internal structure. For interpretability, this raw score corresponds to an approximate average of 2.0 points per item on the original 1–5 Likert scale, which suggests a moderate burnout level. This rate is dangerously close to the 50% threshold, which most studies in the literature [
43,
44] identify as the point at which burnout starts to manifest in real clinical and professional symptoms (e.g., demotivation, errors at work, intention to change or leave job). The SD of the entire scale was 11.945, and the SE was 0.959. The minimum score obtained was 10, while the maximum was 64, indicating a wide range of experience among respondents with regard to burnout symptoms.
The average score for PRB subscale was 2.35, which corresponds to approximately 58.75% of the maximum burnout potential and indicates a moderately high level of personal burnout. Cronbach’s alpha for this subscale is 0.894, indicating high internal consistency. This means that nurses experience fatigue, exhaustion, and reduced motivation in relation to their professional selves moderately often. This level exceeds the 50% threshold, which suggests that it is clinically and organizationally significant and requires preventive monitoring.
The average WRB score was 2.20, corresponding to a percentage of 55%. The reliability coefficient for this subscale was 0.755, which is considered acceptable. This result can be interpreted as a moderate degree of burnout, mainly related to the work environment, prolonged overload, lack of management support or inefficient work organization. Given that there were also questions with very high standard deviations, there is a high degree of individual variability, indicating unequal experiences among nurses.
The mean CRB was 1.63, corresponding to a burnout rate of 40.75%. The reliability of this subscale was again 0.894, which is considered high. This is the lowest indicator among all three dimensions. This result indicates that emotional exhaustion in relation to patients is relatively low, and most nurses are able to maintain empathy and professional distance even in difficult situations. However, some questions (e.g., question 17 had a score of 2.19) also show increased emotional strain on some staff.
All three CBI dimensions have burnout rates above 40%, while two, PRB and WRB, have burnout rates above 50%, indicating the presence of systemic psychological overload. These results are considered moderately high and confirm the need to introduce targeted preventive measures at both the organizational and professional support levels. Since the CBI subscales have a very good psychometric structure, these data are considered reliable and interpretable for both research and management purposes.
4.5. Correlation Results of the Study
To identify factors that statistically significantly predict the level of moral distress among ICU nurses, a multiple linear regression analysis was performed in the study. The total score on the moral distress scale was used as the dependent variable, while the independent variables included various socio-demographic, professional and subjective experience indicators (21 variables). This approach allowed us to assess which of the variables significantly influence distress levels while controlling for the influence of other factors.
To determine which socio-demographic and professional factors most significantly predict the level of moral distress among intensive care nurses, a linear regression analysis was performed, with the MMD-HP (total moral distress index) as the dependent variable, while 21 independent variables included job profile, workload, age, gender, region, education, intention to leave the job, and other aspects.
The overall regression model was statistically significant (F(21,133) = 3.234; p < 0.001), indicating that at least one of the independent variables included is significantly related to the level of moral distress. The coefficient of determination R2 = 0.338 (R = 0.581) indicates that the model explains 33.8% of the total variance in moral distress. Although this value is not very high, it clearly shows that part of the variability in distress is related to both the professional context and personal factors of nurses.
Of all the independent variables, only one was statistically significant (p < 0.05): “Have you ever left or thought about leaving clinical work because of moral distress?”, with a value of −0.317 (p < 0.00). This variable shows a negative and statistically significant association with MMD. This means that respondents who have considered or already left their jobs due to moral distress report a significantly higher level of current distress. This suggests a possible cumulative or chronic effect, in which a previous experience of distress increases sensitivity to new ethical and professional challenges. Two variables showed a trend toward statistical significance in the association between the level of moral distress and “Subjective perception of workload in the last month”, with a value of β = 0.132 (p = 0.099). The trend in these variables suggests that a higher subjective sense of overload may be associated with a higher level of moral distress. Although statistical significance has not been reached, this variable should still be considered a clinically relevant risk factor. The second variable, “Level of education”, was β = 0.184 (p = 0.043). Nurses with higher education levels may have an increased perception of distress, possibly due to higher ethical awareness, a more critical attitude toward systemic barriers, or a greater desire for professional autonomy.
High Variance Inflation Factor (VIF) values were observed for several variables. TISS-28 variables exhibited values of VIF ≈ 38, and evaluation of preventive measures exhibited values of VIF > 3.5. This suggests possible multicollinearity, particularly between questions on work organization, work supervision, and preventive measures. It would therefore be advisable to analyze these variables separately or reduce model complexity by selecting the most relevant variables based on theoretical significance or pre-regression analysis of correlations.
To identify the significant factors influencing the level of professional burnout among ICU nurses, a multivariate linear regression analysis was performed with CBI scores as the dependent variable. The independent variables included socio-demographic data, factors of the professional environment, and experiences and beliefs related to moral distress. The overall model quality is R = 0.695, R
2 = 0.483, which means that the model explains 48.3% of the CBI variability. The ANOVA result is as follows: F (21,133) = 5.910 (
p < 0.001), indicating the overall statistical significance of the model. Four independent variables showed a statistically significant impact on burnout rates. See
Table 5.
The marital status of respondents is positively correlated with CBI results, indicating a difference in burnout levels between single and married respondents. Those who have considered leaving their job also report higher levels of burnout. The factor of “Currently considering leaving due to moral distress” was a statistically significant negative predictor (β = −0.387, p < 0.001).
This factor correlates even more strongly with burnout indicators, highlighting emotional overload and the mismatch between the healthcare system and nurses’ professional values. Factor 4 is as follows: “Have you ever completed the moral distress scale?” (β = −0.241, p = 0.002). This may indicate a greater awareness of professional risks or people with an already higher risk profile.
Multiple linear regression analysis was performed to investigate which factors are statistically significant predictors of potential staff turnover among ICU nurses. Overall, the model showed good fit (R
2 = 0.338), explaining 33.8% of the variance in potential staff turnover (adjusted R
2 = 0.234; F (21,133) = 3.239;
p < 0.001). Of the 21 variables included, four predictors were statistically significant, indicating a notable impact on nurses’ intentions to change jobs. The results are shown in
Table 6.
The negative beta coefficient indicates that specific schedules are associated with lower staff turnover rates, possibly due to greater job stability. The factor of having previously considered leaving a job due to moral distress (β = −0.315, p = 0.001) was one of the strongest negative predictors. Respondents whose workplaces use the TISS-28 tool showed significantly lower potential turnover scores. This result suggests that structured workload measurement can serve as a protective factor. Overall, these results confirm that both the organization of professional workload and subjective experiences of moral distress and burnout are directly related to staff resilience. The implementation of preventive mechanisms in practice, as well as structured workload measurement methods, such as TISS-28 or NAS, can be important tools in staff retention strategies.
To determine which psychosocial factors are associated with taking on additional duties and responsibilities in the work environment, a logistic regression analysis was performed. The dependent variable was binary: 0—has no additional duties, 1—has additional duties. The model initially classified all cases as “has duties” (classification accuracy: 63.2%). After including the independent variables, the classification accuracy increased to 66.5%, thereby improving the forecasting ability. The omnibus test yielded χ2 (3) = 17.069 (p < 0.001), indicating a significant improvement compared to the null model. Nagelkerke R2 = 0.143, which means that the model explains approximately 14.3% of the variation in the presence of additional duties. The sensitivity of the model (correctly identifying “has duties”) is 84.7%, while the specificity (correctly identifying “no duties”) is 35.1%. Of the three independent variables, moral distress total (MMD) appeared to be the only statistically significant predictor of MMD (β = −0.038, p < 0.001). With each increase in moral distress points, the likelihood that an employee will take on additional duties decreases, which could indicate a potential for distress overload and reduce the willingness or ability to perform additional tasks. Exp(B) = 0.963, which means that with each point increase in distress level, the odds of taking on additional duties decrease by 3.7%. The other two variables, CBI (p = 0.455) and intention to change jobs (p = 0.321), did not show a statistically significant effect.
To examine the interrelationships among the tools used in the study, including CBI, MMD, and AST, a correlation analysis was performed using both Pearson and Spearman correlation coefficients. The results reveal different strengths of association and statistical significance between the various factors. The correlation matrix is presented in
Table 7.
There is a moderately strong and statistically significant positive correlation between moral distress and burnout, indicating that a higher level of moral distress is associated with a higher burnout rate. All three burnout subscales showed a moderately strong positive correlation with moral distress, which confirms the assumption that emotional tension and internal conflict arising in professional dilemmas are closely related to symptoms of burnout in all aspects—personal, professional, and in relationships with patients.
There is no significant correlation between either CBI or MMD and intention to leave a job, which may indicate that the intention to leave a job is the result of multiple factors, including work schedule, structured workload, or institutional culture, not just emotional exhaustion. The strength of these correlations is not sufficient to draw further conclusions about causal relationships; regression analysis is more appropriate for this purpose.
These findings demonstrate statistically significant positive correlations among moral distress, burnout, and staff turnover intention, which supports the hypothesis that psycho-emotional strain among ICU nurses is interconnected and may cumulatively influence their intention to leave the profession.
One-way analysis of variance (ANOVA) by region was performed to test whether the region of the respondents (0 = Riga, 1 = Vidzeme, 3 = Kurzeme, 4 = Zemgale) is statistically significantly related to CBI, staff turnover, and moral distress levels. To determine which specific regional groups differ significantly from one another, a post hoc Tukey HSD test was conducted. The test also included a Tukey HSD post hoc analysis to determine which groups differed from one another. Moral distress is the only one of the three indicators that differs significantly between regions. The ANOVA revealed a statistically significant difference in moral distress levels between regions, and the Tukey HSD post hoc test indicated that nurses in the Vidzeme region reported significantly lower levels of distress compared to those in Riga (p = 0.021) and Kurzeme (p = 0.034), while no significant difference was observed between Riga and Kurzeme. Burnout and staff turnover potential do not differ significantly, but trends indicate a potentially higher risk in Kurzeme and Riga.
To assess whether the intensity of workload perception in the last month is significantly related to burnout, personal burnout level, and moral distress, a one-way analysis of variance (ANOVA) was performed using four workload perception levels based on responses to the question about workload perception: from 1 (lowest) to 4 (highest). The results show that the ANOVA result (F = 8.754; p < 0.001) indicates a statistically significant difference between the groups. A post hoc Tukey HSD test was performed to explore pairwise differences. The results showed that burnout scores were significantly higher in group 3 (moderate-high workload) compared to group 2 (lower workload) (*p* = 0.017). The lowest average burnout level was among respondents with the lowest perceived workload (“2”—mean = 31.72), while the highest was among groups with a more intense perception (including “3” and “1”). The results of the ANOVA for moral distress (F = 5.635; p = 0.001) show statistically significant differences. The level of moral distress is lowest among respondents with a lower perceived workload (mean = 39.41) and increases significantly with a higher perceived workload (mean = 53.35 in group “4”).
Based on the in-depth quantitative analysis, it can be concluded that moral distress, burnout, and potential staff turnover among ICU nurses are multifactorial phenomena influenced by socio-demographic, professional, and subjective factors.
The level of moral distress is most significantly predicted by nurses’ previous experience with distress and their desire to leave the job, which shows a strong negative effect (β = –0.317; p < 0.001), indicating chronic accumulation of stress. In addition, educational level (β = 0.184; p = 0.043) and subjective perception of work overload (showing a significant trend, β = 0.132; p = 0.099) confirm that professional education and self-criticism may contribute to a higher perception of distress.
Taking on additional duties at work is inversely associated with moral distress—the higher the distress, the less likely the nurse is to take on additional responsibilities (β = −0.038; p < 0.001). This indicates a functional limitation resulting from moral distress, which may affect collective work efficiency.
Analysis of variance (ANOVA) by region, education, work schedule, and perceived workload reveals that moral distress and burnout differ significantly between regions and work organization models. It is particularly important that subjective workload perception correlates significantly with both increased burnout and moral distress, thus confirming the importance of emotional well-being in the work environment.
The results indicate that moral distress and burnout levels vary significantly across nurse demographics and ICU types, confirming the study’s objective to identify at-risk subgroups based on contextual and sociodemographic characteristics.
In summary, the results confirm that moral distress, burnout, and staff turnover risks are closely interrelated and significantly influenced by previous experience, subjective workload perception, and structural support (e.g., TISS-28 or NAS). The introduction of preventive mechanisms and the improvement of work organisation can serve as strategic orientations to strengthen professional resilience.
The findings of this study directly confirm the central hypotheses: moral distress and burnout are prevalent among ICU nurses; they are significantly interrelated; and these psychosocial factors substantially contribute to nurses’ intention to leave the profession. These results emphasize the urgent need for institutional strategies that address work overload, improve the ethical climate, and implement standardized workload assessment tools such as TISS-28 or NAS.
4.6. Hypothesis Testing
To test H1, which proposed that higher levels of moral distress would be associated with increased burnout among ICU nurses, a linear regression analysis was conducted. The results supported this hypothesis. Moral distress significantly predicted burnout (β = 0.545, p < 0.001). The model explained 29.7% of the variance in burnout scores (R2 = 0.297, F (1, 153) = 64.88, p < 0.001). This finding confirms that ICU nurses experiencing greater moral distress are more likely to report elevated levels of burnout.
For H2, which predicted that burnout would be positively associated with turnover intention, another linear regression analysis was conducted. The results also supported this hypothesis. Burnout was a significant predictor of turnover intention (β = 0.456, p < 0.001). The model accounted for 20.7% of the variance in turnover intention (R2 = 0.207, F(1,153) = 40.06, p < 0.001). These findings suggest that higher burnout levels among ICU nurses increase the likelihood that they will intend to leave their position.
Both regression models yielded statistically significant results, affirming the hypothesized relationships and providing empirical evidence for the proposed pathway from moral distress to burnout and subsequently to turnover intention.
To test H3, which proposed that burnout mediates the relationship between moral distress and turnover intention, a simple mediation model was tested using the PROCESS macro. In this model, moral distress was entered as the independent variable (X), burnout served as the mediator (M), and turnover intention served as the dependent variable (Y).
The overall model was statistically significant (R2 = 0.229, F (2, 152) = 22.64, p < 0.001). Moral distress was positively associated with burnout (a path: β = 0.545, SE = 0.068, t = 8.06, p < 0.001), and burnout was positively associated with turnover intention (b path: β = 0.337, SE = 0.072, t = 4.68, p < 0.001). The indirect effect of moral distress on turnover intention via burnout was β = 0.184, SE = 0.046, and the 95% bootstrap confidence interval did not include zero (CI [0.096, 0.280]), indicating a statistically significant mediation effect. The direct effect of moral distress on turnover intention (c’ path), controlling for burnout, remained significant but was reduced (β = 0.248, SE = 0.074, t = 3.36, p = 0.001), suggesting partial mediation.
These findings confirm that burnout partially mediates the relationship between moral distress and turnover intention among ICU nurses.