Palliative Care Reduces Acute Hospital Use in Stage IV Cancer

Mitigating Acute Care Burden in Advanced Malignancy

As the population of cancer survivors expands due to demographic shifts and therapeutic advances, patients with advanced disease frequently face aggressive and poorly coordinated care near the end of life [1, 2]. Despite guidelines emphasizing early supportive intervention, many patients with metastatic disease experience multiple emergency department visits and intensive inpatient stays in their final months [3, 4]. Research indicates that the median duration from the initiation of palliative services to death is often fewer than 20 days, a window far shorter than the three to four months typically required to realize full multidisciplinary benefits [5]. While automated referral algorithms and early consultation have shown potential to reduce late-stage chemotherapy and improve service uptake, identifying the precise impact of these interventions on acute healthcare utilization remains a priority for oncology teams [6]. To address this gap, researchers recently conducted a retrospective cohort study to quantify how specialist palliative care affects hospitalization rates in a real-world clinical environment.

Analyzing Real-World Utilization via PERR Methodology

To evaluate the impact of specialist palliative care on acute healthcare utilization, researchers conducted a retrospective observational cohort study at the National Cancer Centre Singapore. The study population included 7,144 patients diagnosed with stage IV cancer between January 2019 and December 2022. These patients were followed through July 2023 to capture longitudinal data on emergency department visits and inpatient admissions. Within this total cohort, 1,499 patients (21.0%) received specialist palliative care by the end of the follow-up period. To ensure the findings reflected actual clinical practice rather than controlled trial conditions, the authors utilized real-world data to assess how these interventions influenced subsequent hospital encounters.

To analyze this data, the researchers employed a prior event rate ratio approach with bias correction. The prior event rate ratio is a statistical technique that compares event rates while accounting for unmeasured confounding variables by using data from a period before the intervention. This effectively allows each patient to serve as their own control, mitigating the selection biases inherent in observational research. In the final analysis, each patient who received specialist palliative care was matched with replacement to up to three patients who did not receive such care. This matching process resulted in a final analytical cohort of 5,948 patients, providing a robust framework to quantify the association between specialist palliative care and the reduction of acute care utilization in advanced malignancy.

Significant Reductions in Emergency and Inpatient Admissions

By analyzing the matched cohorts through the prior event rate ratio framework, the researchers identified a substantial decrease in acute care utilization following the initiation of specialist services. Specifically, patients who received specialist palliative care had a prior event rate ratio hazard ratio estimate of 0.644 (95% CI 0.524 to 0.792; P < 0.001) for emergency department visits compared to those who never received such care. This statistical measure, which adjusts for individual patient history to reduce bias, indicates a roughly 35 percent reduction in the rate of emergency department encounters for the intervention group.

The impact on inpatient care was similarly pronounced. Patients who received specialist palliative care had a prior event rate ratio hazard ratio estimate of 0.633 (95% CI 0.539 to 0.743; P < 0.001) for inpatient hospitalizations compared to those who never received specialist palliative care. This represents an approximate 36 percent reduction in the risk of hospital admission. For practicing clinicians, these metrics suggest that specialist palliative care teams are highly effective at managing complex symptoms and coordinating care in outpatient or home settings, thereby avoiding the need for acute stabilization. Ultimately, the findings demonstrate that specialist palliative care was associated with lower rates of emergency department visits and hospitalizations, reinforcing the clinical utility of integrating these services into the standard oncological care pathway to keep patients with advanced malignancies out of the hospital.

The Impact of Timing on Clinical Efficacy

The researchers also examined how the timing of specialist palliative care referral influenced its effectiveness in reducing acute care episodes. A test of interaction (a statistical method used to determine if the effect of an intervention varies across different subgroups or time points) showed that the reduction in acute healthcare utilization was greater with earlier initiation of specialist palliative care (P < 0.001). This finding suggests that the clinical benefits of specialist involvement are maximized when integrated shortly after the diagnosis of advanced disease. Early integration likely allows for more proactive symptom management and the timely establishment of care goals that align with outpatient management, preventing crises before they occur.

While early intervention yielded the most substantial results, the data also support the utility of late-stage referrals. The reduction in emergency department visits and hospitalizations remained significant even if specialist palliative care was initiated approximately one year after the stage IV cancer diagnosis. This indicates that the therapeutic window for specialist palliative care is broad, and clinicians should not withhold a referral simply because a patient is further along in their disease trajectory. Even for patients who have navigated metastatic disease for twelve months without specialist support, the introduction of these services continues to provide a statistically significant buffer against the need for acute hospital stabilization.

For the practicing oncologist or primary care physician, these results clarify that while early referral is optimal, the intervention remains effective throughout the disease course. The persistent efficacy of specialist palliative care at the one-year mark underscores its role as a versatile tool for managing the complex needs of patients with stage IV cancer. By reducing the frequency of emergency department visits and inpatient admissions even in later stages, specialist palliative care helps maintain care continuity and reduces the physical and psychological burden associated with acute hospitalizations.

References

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2. DeSantis C, Lin CC, Mariotto AB, et al. Cancer treatment and survivorship statistics, 2014. CA A Cancer Journal for Clinicians. 2014. doi:10.3322/caac.21235

3. Davies JM, Sleeman KE, Léniz J, et al. Socioeconomic position and use of healthcare in the last year of life: A systematic review and meta-analysis. PLoS Medicine. 2019. doi:10.1371/journal.pmed.1002782

4. Bylicki O, Didier M, Rivière F, Margery J, Grassin F, Chouaïd C. Lung cancer and end-of-life care: a systematic review and thematic synthesis of aggressive inpatient care. BMJ Supportive & Palliative Care. 2019. doi:10.1136/bmjspcare-2019-001770

5. Jordan RI, Allsop M, ElMokhallalati Y, et al. Duration of palliative care before death in international routine practice: a systematic review and meta-analysis. BMC Medicine. 2020. doi:10.1186/s12916-020-01829-x

6. Parikh RB, Ferrell WJ, Li Y, et al. BE-a-PAL: A cluster-randomized trial of algorithm-based default palliative care referral among patients with advanced cancer.. Journal of Clinical Oncology. 2024. doi:10.1200/jco.2024.42.16_suppl.12002