Lymphadenectomy in Robotic and Laparoscopic Gastrectomy – A Retrospective Study with Propensity Score Matching.

We retrospectively reviewed the medical records of 215 consecutive patients with gastric cancer who underwent RG or LG with D1+ or D2 lymphadenectomy at our institution between January 2011 and December 2020. Exclusion criteria were residual gastric cancer, proximal gastrectomy, and D1 lymphadenectomy. Propensity score matching analysis was performed to control selection bias by age, sex, body mass index, operation method, lymphadenectomy, and pathological stage. Of the total cohort, 34 matched pairs were selected. Comparisons between groups were performed using the Fisher’s exact test or Mann-Whitney U-test, as appropriate.