DEFINITION

Overall survival was defined as the length of time between surgery and death or the last follow-up visit to the outpatient clinic. Recurrence-free survival was defined as the length of time between surgery and the diagnosis of disease recurrence, death, or the last follow-up visit. Disease recurrence was either locoregional or distant. Locoregional recurrence was defined as recurrence limited to the intestines, regional lymph nodes, or peritoneum. The last date of data collection was October 30, 2018, and patients for whom no event had occurred or who were lost to follow-up were censored from our study.