Timing of palliative care consultation in advanced cancer: A systematic review.

Abstract

320 Background: Early palliative care consultation (PCC) is associated with improvements in quality of life and symptom burden in patients with advanced cancer, but the optimal timing of consultation across care settings remains uncertain. We reviewed the literature to assess how timing of consultation relates to patient care, healthcare utilization, and end-of-life outcomes. Methods: We searched major biomedical databases from inception through 2026 for studies of adults with advanced cancer that compared distinct timing windows of PCC. Eligible studies reported care outcomes, healthcare utilization, survival, or end-of-life quality measures. Data were extracted and synthesized across randomized and observational studies. Results: Ten studies comprising 155,752 patients met inclusion criteria, including four randomized trials and six observational studies. Earlier PCC was associated with better clinical and utilization outcomes. In hospitalized patients, consultation within the first 2-6 days of admission was associated with lower costs and fewer readmissions, with the largest cost reduction reported when consultation occurred within 2 days of admission. In advanced cancer outpatients, earlier integration was associated with improved quality of life and symptom outcomes, while survival effects were inconsistent. At the end of life, earlier consultation was associated with lower ICU use, less aggressive care, and higher family-rated quality of care. Overall, benefits were directionally consistent, but the optimal timing threshold varied by setting and outcome (Table 1). Conclusions: Earlier PCC in advanced cancer is consistently associated with better care and utilization outcomes, but the literature does not support a single universal referral threshold. The most defensible conclusion is that consultation should occur earlier in the disease course and before crisis-driven hospitalization or the final days of life. Prospective studies using prespecified timing definitions are needed to identify the most clinically meaningful referral windows. Timing of palliative care consultation and key outcomes. Clinical Context Optimal Timing of PCC Primary Benefits Observed Acute Hospital Admission Within 48 hours of admission Greatest cost reduction (24%; ~$2,280/patient) Hospitalized Patients at Risk of Readmission Days 3–6 after admission Lowest 30-day readmission rates (19.2% reduction compared with later consultation) New Advanced Cancer Diagnosis (Outpatient Setting) Within 4–8 weeks of diagnosis Improved quality of life (SMD 0.27, 95% CI 0.15–0.38) and reduced depressive symptoms Advanced Serious Illness with Anticipated End-of-Life Needs More than 30 days before death (typically 1–6 months) Lower ICU use (5% vs 20%) and higher family-rated care quality (AOR 1.56, 95% CI 1.25–1.95) PCC = Palliative Care Consultation; SMD = Standardized Mean Difference; AOR = Adjusted Odds Ratio.