At Clarunis - University Center for Gastrointestinal and Liver Diseases at St. Claraspital between 2019 und 2020, all colorectal patients were treated according to a standardized perioperative protocol. As of 2021 until today, an ERAS protocol was established and all colorectal patients who met inclusion criteria participated in this program automatically as part of a new standardized care. Perioperative data was collected in a clinical information system (Phoenix - CGM Clinica Information Systeml).~In this retrospective cohort study, we compare demographic, perioperative and postoperative data among the two groups ERAS and non-ERAS using a weighted propensity score analysis for patients who underwent surgery as part of the ERAS program and for patients without a standardized ERAS protocol.~All patients treated at the colorectal unit from 2019 until August 2022 and who are considered for the analysis have given written general consent for the use of health-related data for research projects (attached to this document).
The aim of this single-center retrospective cohort study is to explore the effect of late adaptation of an ERAS protocol in a high-volume colorectal surgical unit.~The primary endpoint is the surgical outcome measured by early postoperative complications, defined by the comprehensive complications index. Secondary endpoints include amongst others LOS (length of stay), cost analysis, short-term follow-up in the ERAS group.