Summary: Background: The benefits of artificial nutrition and hydration in patients with head and neck cancer and esophageal cancer in the late stage remain unknown. We performed a secondary analysis of a cohort study to investigate the effects of enteral tube feeding (ETF) and parenteral nutrition and hydration (PNH) on survival in this population. Methods: Patients with head and neck cancer and esophageal cancer admitted to palliative care units were included. Information on primary nutritional administration routes during the first week of admission and data on the averaged calorie sufficiency rate/total calorie intake, e.g., 75%≤/750 kcal/day≤ and