90-Day Mortality After Emergency Department Discharge in Advanced Cancer

This intervention refers to retrospective evaluation of clinical and laboratory data of advanced cancer patients who presented to the emergency department between December 2022 and March 2025. Data will be extracted from the hospital information system (HBYS) and national death registry (e-Nabız). Parameters include demographics, ECOG performance status, primary tumor type, metastatic sites, laboratory markers (e.g., NLR, CRP, albumin, LDH), and outcomes such as 90-day mortality, re-admissions, and re-hospitalizations. No experimental treatment, drug, or device is administered as part of the study.