BackgroundThe impact of palliative care consultation on the management and outcomes of patients hospitalized with out-of-hospital cardiac arrest (OHCA) remains poorly understood. This study examined associations between palliative care consultation and in-hospital outcomes of patients hospitalized with OHCA, stratified by survival status. MethodThis cross-sectional study used data from the National Inpatient Sample (2016–2021). Adult patients hospitalized with OHCA who received cardiopulmonary resuscitation were included. Multivariable analyses assessed associations between palliative care consultation and outcomes in non-terminal and terminal OHCA hospitalizations, adjusting for demographics, hospital characteristics, and comorbidities. ResultsAmong 488,700 OHCA hospitalizations, palliative care consultation was associated with lower odds of invasive procedures in non-terminal hospitalizations, including percutaneous coronary intervention (PCI) (aOR 0.30, 95 % CI 0.25–0.36), mechanical circulatory support (aOR 0.54, 95 % CI 0.44–0.68), permanent pacemaker (aOR 0.27, 95 % CI 0.20–0.37) and implantable cardioverter defibrillator insertion (aOR 0.22, 95 % CI 0.16–0.31), and cardioversion (aOR 0.62, 95 % CI 0.55–0.70). In terminal hospitalizations, palliative care was associated with lower odds of PCI (aOR 0.78, 95 % CI 0.70–0.87) and cardioversion (aOR 0.91, 95 % CI 0.85–0.97), but higher odds of therapeutic hypothermia (aOR 3.12, 95 % CI 2.72–3.59), gastrostomy (aOR 1.22, 95 % CI 1.05–1.41), and renal replacement therapy (aOR 1.19, 95 % CI 1.12–1.26). Palliative care was associated with higher DNR utilization in both subgroups and lower hospital costs in non-terminal hospitalizations but higher costs in terminal hospitalizations. ConclusionPalliative care consultation in OHCA is associated with differences in invasive procedures, DNR utilization, and hospital costs, varying by survival status.