Distress can range from normal emotions, such as embarrassment, sadness, and fear, to problems that can cause psychological and social impairment, such as depression, anxiety, panic, social isolation, and existential and spiritual crises. The prevalence of distress in patients with cancer is reported to be 35–52%, although there are some differences depending on the evaluation period or evaluation tool of distress. In addition, the prevalence of depression, one of the most common types of distress in these patients, is reported to be approximately 15–29% [10].
The DT is widely used to measure stress index in patients with cancer. Many studies have reported the measurement or management of cancer-related distress in other cancers (breast cancer, lung cancer, cervical cancer, hematological malignancy, and colorectal cancer [11–19]. Distress management, such as pain control or emotional support, is important when patients with cancer receive palliative treatments. Moreover, the measurement and management of distress are important for patients with cancer who undergo surgery and adjuvant treatment.
Several studies have reported that the level of distress in patients with pancreatic cancer is relatively high compared to that in other cancer types [20–22]. In addition, the prevalence of depression in patients with pancreatic cancer is more than seven times higher than that in the general population, and the degree of depressive symptoms is known to be more severe [23, 24]. According to a meta-analysis by Barnes et al., approximately 43% of patients with pancreatic cancer reported experiencing depression after diagnosis [25].
The NCCN guidelines suggest an algorithm for requesting appropriate psychosocial support services based on distress levels to distinguish between mild distress (less than 4 points on the DT) and moderate-to-severe distress (more than 4 points on the DT), and recommend interventions by mental health professionals when patients with cancer complain of moderate-to-severe distress [26–28].
In this study, the average distress score of patients with pancreatobiliary cancer was 6.21 ± 2.52 points, and 129 (83%) patients had moderate-to-severe distress with a score of 4 or more that required distress management. In particular, patients with pancreatic cancer correspond to a high-risk group of distress in terms of psychosocial aspects, and several studies have reported that the level of distress in patients with pancreatic cancer is relatively high compared with other cancer types [20, 21].
In a study [29] targeting patients who underwent surgery after first diagnosis of breast cancer, the average distress score of the patients was 5.0 ± 3.0 points, and in a study [17] conducted on patients with esophageal cancer, the average distress score was 4.06 ± 2.04 points. Compared to the results of these studies, the distress of patients with pancreatobiliary cancer in the current study was quite high.
The measurement of distress severity comprised practical, family, emotional, physical, and spiritual factors. In particular, the distress measurements in our study showed differences in scores of physical problems. In the moderate-to-severe distress group, a statistically significant difference in the scores of physical problems (indigestion, eating) were observed. Rates of discomfort due to physical problems, such as pain and sleep disorders, were higher in the moderate-to-severe distress group than in the mild-distress group. These results indicate the complexity of pancreaticoduodenectomy, which involves resecting multiple organs, creating multiple anastomosis sites, and can result in postoperative digestive function changes and frequent complications related to eating disorders, such as delayed gastric emptying. Furthermore, in the emotional domain, “sadness” was higher in the moderate-to-severe distress group than in the mild-distress group. These results suggest the importance of evaluating not only physical problems but also psychological problems because patients with pancreatic cancer are more likely to experience depression than patients with other cancers. In particular, patients with pancreatic cancer experience psychological distress due to physical symptoms, such as pain, digestive problems, cachexia, and fatigue. However, in clinical settings, medical staff are unable to identify patients’ distress in a timely manner, and fail to implement appropriate evaluations and interventions for psychological problems.
There were no significant differences in postoperative complications between the two groups. Therefore, even in the absence of severe pancreatectomy complications, such as pancreatic fistula and delayed gastric emptying after surgery, surgical stress has a significant effect on patients’ distress score. Unlike other patients with cancers, patients with pancreatobiliary cancer often need to continue chemotherapy after major surgery; therefore, stress management is important for improved quality of life of such patients. In addition, in other studies, in the case of pancreatobiliary cancer surgery, the stress index was high even before surgery; therefore, it is important to assess and manage stress after surgery. To the best of our knowledge, cancer-related distress is known to affect recurrence. Therefore, cancer-related distress not only affects the quality of life but also the survival rate due to cancer [30–32].
In our study, the patients who received neoadjuvant treatment showed differences in distress scores. Patients who received neoadjuvant treatment had lower DT scores than those who underwent upfront surgery. This is important because the prevalence of neoadjuvant treatments for pancreatobiliary cancer is increasing. However, there have been no studies on the distress experienced by patients with pancreatobiliary cancer who undergo neoadjuvant treatment compared to that experienced by patients who undergo upfront surgery. We assumed that patients who received neoadjuvant therapy had lower distress scores than those who received upfront surgery because they had overcome the emotional stress of cancer diagnosis much earlier.
Our study showed that many patients experienced severe distress after surgery, and that most factors affecting distress were physical problems. In the case of pancreatic biliary cancer, which has a poor prognosis, many patients believe that their emotional problems will have the greatest impact on their suffering. However, our data showed that the patients’ physical problems contributed to greater suffering after complicated pancreatobiliary cancer surgeries. Therefore, this study underscores the importance of proactively managing physical problems (pain control, rehabilitation, dietary habits, and nutritional support) in patients undergoing pancreatobiliary cancer surgery.
This study had some limitations. We were unable to evaluate the preoperative distress scores of the patients. However, considering the great impact of surgery for pancreatobiliary cancer, the postoperative score was sufficient to allow patients to assess their distress levels and consider distress management. As the number of patients receiving neoadjuvant chemotherapy, which is considered a strength of this study, was small, it is necessary to conduct more prospective studies.
In conclusion, our results highlight that patients with pancreatobiliary cancer often exhibit higher stress levels than those who undergo surgery for other cancers; therefore, the approach used in this study holds significance. These results can serve as basic data for identifying individuals with higher distress levels and for implementing psychosocial interventions. Future studies should actively monitor distress indices in patients with pancreatobiliary cancer and strive to improve their quality of life.