Enhanced recovery protocol consisted of a series of elements aiming to optimize and standardize perioperative care. This study aims to evaluate the safety and feasibility of a modified ERAS protocol following colorectal surgery in the elderly population, aged 65 years or older. This is a retrospective study based on prospectively collected data. Patient privacy has been carefully protected throughout the research process, and no aspect of this study interfered with or altered the patients' treatment or clinical care.

Inclusion Criteria:

• they underwent radical resection for colorectal cancer
• the procedure was minimally invasive surgery
• they were aged 65 or older
• they provided signed informed consent.

Exclusion Criteria:

• Patients who underwent emergency surgery for colorectal cancer.
• Patients with incomplete medical records or missing data relevant to the study.
• Patients with synchronous malignancies or a history of other cancers within the past five years.
• Patients with severe comorbidities (e.g., advanced cardiovascular, respiratory, or renal diseases) that contraindicate ERAS protocol implementation.
• Patients with preoperative metastatic disease or locally advanced tumors requiring palliative procedures.
• Patients who did not comply with or complete the ERAS protocol during the perioperative period.

From January 2018 to December 2022, comprehensive data on patients who underwent colorectal resection for malignancy at a single medical institute, Chang Gung Memorial Hospital, were prospectively collected and retrospectively reviewed.