Abstract
Background
We lack knowledge of which factors are associated with the risk of developing complex palliative care needs. The aim of this study was to investigate the associations between patient-reported health-related quality of life and subsequent referral to specialized palliative care (SPC) and hospital utilization.
Methods
This was a prospective single-center cohort study. Data on patient-reported outcomes were collected through the European Organization of Research and Treatment of Cancer Questionnaire-Core-15-Palliative Care (EORTC QLQ-C15-PAL) at the time of diagnosis. Covariates and hospital utilization outcomes were collected from medical records. Adjusted logistic and Poisson regression were applied in the analyses. Participants were newly diagnosed with incurable gastrointestinal cancer and affiliated with a palliative care case management intervention established in a gastroenterology department.
Results
Out of 397 patients with incurable gastrointestinal cancer, 170 were included in the study. Patients newly diagnosed with incurable gastrointestinal cancer experienced a substantial burden of symptoms. Pain was significantly associated with subsequent referral to SPC (OR 1.015; 95% CI 1.001–1.029). Patients with lower education levels (OR 0.210; 95% CI 0.056–0.778) and a Charlson Comorbidity Index score of 2 or more (OR 0.173; 95% CI 0.041–0.733) were less likely to be referred to SPC. Pain (IRR 1.011; 95% CI 1.005–1.018), constipation (IRR 1.009; 95% CI 1.004–1.015), and impaired overall quality of life (IRR 0.991; 95% CI 0.983–0.999) were significantly associated with increased risk of hospital admissions.
Conclusion
The study indicates a need for interventions in hospital departments to identify and manage the substantial symptom burden experienced by patients, provide palliative care, and ensure timely referral to SPC.
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Background
The referral of patients with incurable cancer to specialized palliative care (SPC) is challenged by a lack of strategies for referral practice, inequality in age, diagnoses, and region, as well as physician attitudes [1,2,3].
Patients with incurable gastrointestinal cancer have a substantial symptom burden escalating towards the end of life [4]. In cross-sectional studies, symptoms such as pain, fatigue, and constipation are associated with hospitalizations and reduced health-related quality of life (HRQoL) [4,5,6,7,8,9,10,11,12]. This often demands either generalist palliative care (PC), which is provided by healthcare professionals who integrate PC into their clinical practice without specialized training, such as those in surgical departments, or specialized PC delivered by PC specialists addressing patients’ complex needs from dedicated teams in hospices or specialized PC hospital units [13]. Due to limited capacity, less than 50% of patients with incurable cancer are provided SPC in Denmark, and 23% of patients referred to SPC do not proceed to an SPC unit [14]. They either die before admittance, are not admitted due to a shortage of resources in SPC, or fail to meet the referral criteria [15]. The median survival time from referral to SPC in Denmark is 36 days, emphasizing the importance of timely referral [14]. Visitation criteria for SPC include complex palliative symptomatology, a life-threatening illness, and a patient’s awareness of the prognosis of the disease [16]. However, initiation of SPC can mistakenly be perceived as a marker of end-stage disease, although disease stage alone does not determine the complexity of palliative care (PC) needs to be required for visitation [17, 18].
SPC has previously been associated with improved HRQoL [19,20,21,22]. Other advantages include decreased hospital admissions and shorter hospital stays [23]. Evidence of effective generalist PC interventions is yet to be established [24]. The associations between patient-reported HRQoL, demographic characteristics, and the referral to SPC have previously been studied with attention to the time point of admission to SPC [25,26,27]. However, there is an information gap concerning the risk factors associated with developing complex PC needs in patients not already affiliated with SPC.
Hospital departments outside of SPC play a crucial role in identifying and managing patients needing PC. At the Digestive Disease Center, Copenhagen University Hospital—Bispebjerg, Denmark, a nurse-led palliative care case management intervention for gastrointestinal cancer (PalMaGiC) was initiated in 2013 to optimize the deliverance of PC. Knowing the characteristics of patients who are at risk of needing SPC despite well-organized PC interventions provided by hospital departments not specialized in palliative care may, in the future, improve timely and relevant referral of patients to SPC [5, 8, 12].
The aim of this study was to investigate the associations between patient-reported symptoms, problems, and HRQoL with subsequent referral to SPC and hospital utilization among patients with newly diagnosed incurable gastrointestinal cancer.
Methods
Design
In this prospective single-center cohort study, we explored factors associated with future contact with SPC and hospital utilization.
Participants and settings
Patients from the Digestive Disease Center, Copenhagen University Hospital—Bispebjerg, affiliated with the PalMaGiC from December 2018 to May 2022, were included. PalMaGiC is a case management intervention established in the Digestive Disease Center, a gastroenterology hospital department, and developed to improve early identification and management of palliative care needs and quality of life. PalMaGiC receives approximately 120 patients with incurable gastrointestinal cancers annually and is led by two specialist nurses performing symptom assessment, care planning, care coordination, and needs-based follow-up. The PalMaGiC intervention is described in detail in another publication [28].
The recruitment took place at the first contact with the PalMaGiC nurse. This contact was established shortly after the patient’s cancer disease was recognized as incurable. Patients were consecutively included in the study and asked to provide demographic information and complete the European Organization of Research and Treatment of Cancer QoL Questionnaire Core-15-Palliative care (EORTC QLQ-C15-PAL) questionnaire, which is a shortened version of European Organization of Research and Treatment of Cancer QoL Questionnaire Core-30 (EORTC QLQ-C30) and includes issues important to patients in palliative care, at the initial interview (baseline) [29]. This interview took place either at the Digestive Disease Center or by telephone. Data on diagnosis, treatment decisions, antineoplastic treatment, comorbidity, and healthcare utilization were collected from the patient’s medical records. Data were prospectively entered into a database.
Inclusion criteria: patients ≥ 18 years old with incurable cancers of the esophagus, stomach, pancreas, bile duct, colon, or rectum not being treated with curative intent.
Exclusion criteria: not speaking and understanding Danish well enough or unable to complete the questionnaire due to cognitive inability or functional deterioration, and concurrent affiliation with SPC at the start of PalMaGiC or referral immediately after.
Variables
Outcomes
The primary outcome was a referral to SPC (yes/no). Secondary outcomes were the total number of hospital admissions, defined as at least one overnight stay, and length of visit, defined as the total of days at the hospital. Data were true to time and collected from patient records.
Independent variables
Baseline patient-reported symptoms, physical function, emotional function, and overall QoL were measured on EORTC QLQ-C15-PAL. EORTC QLQ-C15-PAL is a patient-reported outcome measure (PROM) validated in Danish and contains 15 items, encompassing two multi‐item functional scales (emotional and physical), two multi‐item symptom scales (fatigue and pain,) a five single‐item symptoms (nausea/vomiting, dyspnea, insomnia, appetite loss, and constipation), and an overall QoL question. All items are rated on a scale of 1 (not at all) to 4 (very much), except for the overall QoL question, which is rated from 1 (very poor) to 7 (excellent). All scores are transformed to a 0–100-scale range: a higher score indicates better physical and emotional functioning and overall QoL, while a higher score on symptom scales indicates an increased symptom burden. The questionnaire covers an assessment of the past week [29].
Covariates
Age, sex, cancer site, metastases (locally advanced or metastases), and educational level (master’s level or above/primary bachelor’s level) were included as covariates. Furthermore, we included comorbidity as the calculated score according to the Charlson Comorbidity Index (CCI) based on the International Classification of Disease (ICD-10) and categorized into 0 = normal, 1 = moderate, and ≥ 2 = severe [30, 31].
Patients’ diagnoses were grouped into five areas of gastrointestinal cancers: “ECS” (esophagus, cardia, stomach); “pancreas”; “colorectal” (colon, rectum, and appendix); “bile ducts” (cholangiocarcinoma and gall bladder), and “other” (hepatocellular carcinoma, small intestine and unknown).
Analyses
Descriptive statistics, including frequencies, medians, and ranges, were applied for patient characteristics, information on SPC, symptoms, and overall QoL. Crude and adjusted logistic regression were used to investigate the associations between symptoms, physical function, emotional function, and overall QoL and the binary outcome referral to specialized palliative care (yes/no). The associations between symptoms, physical function, emotional function, overall QoL and hospital stays, and the total length of stay were analyzed using Poisson regression. An offset variable was created to adjust for follow-up time. A model was created for each of the EORTC QLQ-C15-PAL subscales: symptoms, physical function, emotional function, and overall QoL as a continuous variable. Patients were followed from the first interview with the PalMaGiC-nurse (baseline) and censored at transfer to SPC, death, or end of study (September 2022).
Sensitivity analyses were performed for variables with statistically significant association to the outcomes by dichotomizing at two different cut-off points reflecting if the patient “experienced” the symptom/problem scores of ≥ 33 (a little) and experienced the symptom/problem “severely” with scores of ≥ 66 (quite a bit and very much) [32]. All adjusted analyses were adjusted for age, sex, cancer site, metastases, comorbidity, physical function, pain, and overall QoL. In the sensitivity analyses, testing “experienced pain” and “severe pain” as independent variables, we excluded adjusting pain in the model to avoid collinearity.
Finally, missingness in QoL data was investigated using patient characteristics and information on referral to SPC from medical files for patients not included due to lack of baseline information about HRQoL. Included and excluded patients were compared using the Wilcoxon rank sum test for continuous variables and the chi-squared test for categorical variables, respectively. Data on educational level were not available for excluded patients. The statistical analyses were performed in SAS 9.4. A P value of < 0.05 was considered statistically significant.
Results
Study sample
From December 2018 to May 2022, 397 patients were referred to PalMaGiC. After excluding 227, 170 patients were included in the study (Fig. 1). Fifty-five percent were men, and the median age was 74 (IQR 66–81). At the end of the study period, 92% of the patients had died. Follow-up time was a median of 69 (IQR 28–199) days. Days from PalMaGiC to death were median 114 (IQR 47–189.5) for ECS, 76 (IQR 40–173) for pancreatic, 65 (IQR 45–138) for bile duct, and 87 (IQR 41–317) for colorectal cancers. Characteristics of included and excluded patients are summarized in Table 1.
Baseline HRQoL
The symptoms with the highest proportion of patients with scores > 33 were fatigue (85%), appetite loss (72%), pain (60%), and sleeplessness (53%). Furthermore, 85% reported impaired overall QoL, 68% reported impaired physical function, and 48% reported impaired emotional function (i.e., scores ≤ 66).
The score reported for overall QoL was a mean score of 45 (SD 26.67). The physical function score was 53 (SD 26.90), and the emotional function score was 72 (SD 26.13). The highest mean symptom scores were fatigue (a mean score of 63, SD 30.30), appetite loss (mean 52, SD 39.56), and pain (mean 41, SD 35.35). The remaining mean symptom scores at baseline were sleeplessness 34 (SD 38.03), constipation 27 (SD 36.33), dyspnea 25 (SD 31.93), and nausea 17 (SD 28.19). The distribution of questionnaire responses is shown in Fig. 2.
Referral to specialized palliative care (SPC)
Of the included patients, 74% were referred to SPC, and 86% of these patients were admitted to SPC, while 18 patients died before admittance to an SPC unit. The number of days from the start of PalMaGiC to transfer to SPC was 52 (IQR 21–133). The number of days from referral to transfer to SPC was a median of 7 (IQR 3–13), and the median number of days from transfer to death was 30 (IQR 8–70) in this sample. Overall, 58% of the excluded patients were affiliated with SPC either immediately after the incurable diagnosis (n = 47) or referred later (n = 85), which was significantly fewer than included patients referred to SPC (p = 0.002).
The association between baseline HRQoL and referral to SPC
Pain was significantly associated with subsequent referral to SPC (OR 1.015; 95% CI 1.001–1.029). No other symptoms, physical function, emotional function, or overall QoL were associated with subsequent referral to SPC (Table 2). In the sensitivity analysis, severe pain of ≥ 66 was significantly associated with referral to SPC (OR 2.885; 95% CI 1.035–8.056), but not pain ≥ 33. Patients with a lower level of education (OR 0.210; 95% CI 0.056–0.778), a CCI of 2 or more (OR 0.173; 95% CI 0.041–0.733), and a locally advanced cancer (compared to metastatic disease) (OR 0.279; 95% CI 0.111–0.696) were less likely to be referred to SPC.
The associations between baseline HRQoL and hospital admissions and length of stay
Overall, patients had a median of 2 (IQR 1–2) hospital admissions, and the median total length of stay was 9 days (IQR 2–18) in the follow-up period. After adjustment for the covariates, the incidence rate of hospital admissions in patients diagnosed with cancer in the bile ducts was significantly higher than in patients diagnosed with colorectal cancer (IRR 2.443; 95% CI, 1.217–4.906) (Table 3). In addition, pain (IRR 1.011; 95% CI, 1.005–1.018), constipation (IRR 1.009; 95% CI 1.004–1.015), and impaired overall QoL (IRR 0.991; 95% CI 0.983–0.999) at baseline were significantly associated with increased risk of subsequent hospital admissions (Table 4).
Bile duct cancer (IRR 2.678; 95% CI, 1.296–5.534), pain (IRR 1.088; 95% CI 1.002–1.016), appetite loss (IRR 1.008; 95% CI 1.002–1.014), constipation (IRR 1.009; 95% CI 1.004–1.015) and impaired overall QoL (IRR 0.986; 95% CI 0.978–0.995) at baseline were associated with increased length of stay (Table 4).
Discussion
Symptom burden and referral to SPC
This study found that patients newly diagnosed with incurable gastrointestinal cancer experienced a substantial burden of symptoms, including pain, impaired physical function, impaired emotional function, and impaired overall QoL, which make them candidates for an increased focus on PC. Previous studies have identified similar symptom burden by focusing on symptoms on admittance to SPC or at initiation of antineoplastic treatment [4, 8, 26, 33]. In the present study, baseline pain was associated with subsequent referral to SPC, which may be considered a proxy for palliative care needs. In a large Danish nationwide register-based study of patients with esophageal, stomach, colorectal, and pancreatic cancers, the frequency of pain was 77%, with mean scores between 53 and 58 at the time of admittance to SPC [26], thus indicating that pain is a persistent symptom with increasing intensity over time. Moreover, pain in malignant diseases is associated with fear towards the end of life and is thus a complex condition that often requires SPC [34,35,36]. A cross-sectional observational study evaluating the thresholds for clinical importance of EORTC QLQ-C15-PAL by Pilz et al. included patients receiving PC. The patients who reported clinically important symptoms had lower mean scores for the physical and emotional function and higher scores for symptoms than the scores found in our study, with the exception of physical function scores [32]. Therefore, healthcare professionals must include the patient in the interpretation by discussing the impact of the symptom on their everyday life and the subsequent decision of treatment and referral to SPC.
Interestingly, no other symptoms or problems were associated with the subsequent need for SPC in this study. A possible explanation could be the fluctuation of symptoms throughout the trajectory or later escalation for some patients. Another explanation may be the increased focus on PC needs by the PalMaGiC intervention. This is the first study to investigate the associations between baseline HRQoL and subsequent SPC needs. Other studies investigated systematic screening to trigger referral to SPC. These studies used standardized referral criteria based on expert consensus, such as the National Comprehensive Cancer Network’s palliative care screening items (NCCN) [37], consisting of screening for uncontrolled symptoms, functional status, prognosis, and distress. The authors found increased SPC consultations when standardized referral criteria were systematically assessed [38,39,40].
The use of PROM in the identification of patients in need of SPC is challenged by the many patients unable to complete the questionnaire due to deterioration in the last phase of life [41,42,43]. This was confirmed in the present study, where a large proportion of patients did not complete the questionnaire. Using PROM to identify patients in need of SPC should not favor questionnaire completers and neglect non-completers who are in poorer condition and possibly more burdened by symptoms. The White Paper on Outcome Measures in Palliative Care recommends using proxy assessments provided by healthcare professionals or caregivers for patients unable to complete questionnaires to accommodate this common issue [44]. Although the evidence of accuracy is inconsistent, this could offer valuable information on the patient’s symptoms and prompt clinical awareness of the need for SPC [44, 45]. A clinician-reported outcome measure, such as the proxy-reported Integrated Palliative care Outcome Scale (IPOS) staff version, can accommodate this issue [46]. IPOS staff version assesses patients’ symptoms facilitated by healthcare professionals through questions covering how the patient has been affected by the symptom during the past week with five response categories from “Not at all” to “Overwhelming,” including “cannot assess.” Studies have shown the IPOS staff version to be valid and reliable [46, 47].
Hospital utilization
Patients reporting pain, constipation, and impaired overall QoL at the time of a recognized incurable gastrointestinal cancer were more likely to be hospitalized later in the trajectory and to spend more days in the hospital. Baseline appetite loss was associated with longer hospital stays. Nipp et al. reported similar findings by hospitalized patients with advanced cancers upon admission [8]. Physical symptoms were associated with longer duration of hospital stay and more frequent unplanned readmissions, confirming the findings in the present prospective study that patient-reported symptoms at the time of diagnosis of incurable cancer can result in hospitalizations later in the disease trajectory [8]. Seventer et al. also found that a higher symptom score and lower physical function score were associated with a higher risk of hospital admissions in patients with advanced gastrointestinal cancers [48]. Symptoms of constipation, including pain and appetite loss, reported by patients who had more hospital admissions and longer hospital stays, can be caused by malignant bowel obstruction [49]. This may explain the higher risk of hospital admissions and longer stays in the hospital in patients reporting baseline constipation in this study. Malignant bowel obstruction is highly prevalent in patients with gastrointestinal cancers due to carcinomatosis or intestinal tumor blockage [49, 50]. The diagnosis requires careful assessment and a clinical strategy different from that used to treat constipation [6, 49].
What this study adds
This study demonstrates that despite a substantial burden of symptoms, pain at the time of the diagnosis in patients with incurable gastrointestinal cancer was the only factor associated with subsequent referral to SPC. This can be hypothesized to be related to providing a palliative care intervention (PalMaGiC). However, the substantial symptoms increase the risk of hospital admissions and days in the hospital. Thus, it is essential that hospital departments focus on providing generalist palliative care, including adequate identification and management of symptoms. We suggest that baseline pain should lead to immediate initiation of pain management and a follow-up assessment of symptoms shortly after.
Unsuccessful pain management on follow-up assessment should prompt healthcare professionals to refer patients to SPC to offer the best possible pain relief to improve QoL.
The short prognosis of the subgroup of patients with bile duct cancers and their high risk of hospital utilization should prompt referral to SPC shortly after the incurable diagnosis is confirmed and if they present with baseline pain.
Finally, we must intensify the assessment and treatment of the subgroup of patients with baseline constipation, with attention to the possibility of the differential diagnosis of malignant bowel obstruction.
Future research should address the symptom burden in the time gap between baseline assessment and referral to SPC or death, including the frequency of follow-up PROM assessments. Additionally, future investigation should focus on proxy assessment of symptoms and developing more adequate referral criteria based on the characteristics of patients with gastrointestinal cancers, including customized criteria for the group of patients unable to complete PROMs.
Strength and limitations
A strength of this study is the prospectively collected PROM data from patients with gastrointestinal cancer with a limited lifespan, which described the symptom burden at the start of the trajectory in a gastroenterology hospital department.
A limitation is the selection bias reflected in the high proportion of excluded patients, possibly severely burdened by symptoms. However, we were able to analyze baseline characteristics from these excluded patients and provide a complete description of our cohort.
Another limitation is the way education level has been grouped together. Specifically, the grouping of bachelor’s education with primary and secondary education levels may obscure the actual impact of education on the outcomes being studied. This grouping may have resulted in underestimating the associations with higher education. A limitation is also the relatively small sample and single-center setting in the study, compromising the generalizability of the study due to the diversity of organizations of generalist palliative care in hospital departments in Denmark and internationally.
Finally, we are limited in categorizing cancer sites in upper and lower gastrointestinal cancers. Upper gastrointestinal cancers differ substantially from colorectal cancers in prognosis, symptom burden, and hospital utilization rate, potentially leading to missed signals in our statistical analysis.
Conclusion
Patients in this study presented with a high symptom burden early in their disease trajectory, highlighting the need for interventions in general hospital departments to identify and manage symptoms and provide palliative care besides ensuring timely referral to SPC.
Data availability
No datasets were generated or analyzed during the current study.
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Acknowledgements
The authors thank Morten Aagaard Petersen for the statistical support and specialist nurses Gitt Krebs Mikkelsen and Ninette Blomberg for the help in including patients.
Funding
Open access funding provided by Copenhagen University This study was funded by the Danish Cancer Society grant number R303-A17509-21-S3. The funders did not have any influence on data, analyses, or interpretation.
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SG, KSB, SH, PMK, LJ, and BL made a substantial contribution to the concept and design of the study. Data collection and analysis were performed by SG, KSB, SH, and PMK. The first draft of the manuscript was written by SG. All authors critically revised and approved the article upon submission.
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This study was approved by the Danish Data Protection Agency P-2021–414. The Danish Society for Patient Safety, journal number R-22059811, approved the collection of data from medical files of excluded patients (dead) who did not consent to participate in the study. The study was conducted according to the Helsinki Declaration.
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Participants provided written informed consent.
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Gerhardt, S., Benthien, K.S., Herling, S. et al. Associations between health-related quality of life and subsequent need for specialized palliative care and hospital utilization in patients with gastrointestinal cancer—a prospective single-center cohort study. Support Care Cancer 32, 311 (2024). https://doi.org/10.1007/s00520-024-08509-z
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DOI: https://doi.org/10.1007/s00520-024-08509-z