BackgroundThe increase of quality of life, the improvement in the perioperative care programs, the use of the frailty index, and the surgical innovation has allowed to access of complex abdominal surgery for elderly patients like liver resection. Despite of this, in patients aged 70 or older there is a limitation for the implementation ERAS protocols.The aim of this study is to evaluate the implementation ERAS protocol on elderly patients (≥70years) undergoing liver resection. MethodsA prospective cohort study of patients who underwent liver resection from December 2017 to December 2019 with an ERAS program. We compare the outcomes in patients ≥70years (G≥70) versus <70years (G<70). The frailty was measured with the Physical Frailty Phenotype score. ResultsA total of 101 patients were included; 32 of these (31.6%) were patients ≥70years. 90% of the both groups had performed >70% of the ERAS. Oral diet tolerance and mobilization on the first postoperative day were quicker in <70years group. The hospital stay was similar in both groups (3.07days/2.7days). Morbidity and mortality were similar; ClavienI-II (G≥70: 41% vs G<70: 30.5%) and Clavien ≥III (G≥70: 6% vs G<70: 8.5%), like hospital readmissions. Mortality was <1%. ERAS protocol compliance was associated with a decrease in complications (ERAS <70%: 80% vs ERAS >90%: 20%; p=0.02) and decrease in severity of complications in both study groups. Frailty was found in 6% of the elderly group; the only patient who died had a frailty index of 4. ConclusionImplementation of ERAS protocol for elderly patients is possible, with major improvements in perioperative outcomes, without an increase in morbidity, mortality neither readmissions.