Abstract
PURPOSE: Age and postoperative complications are known risk factors for venous thromboembolism (VTE). Minimally invasive surgery and Enhanced Recovery After Surgery (ERAS) protocol has been implemented to reduce these risks. The purpose of this study was to assess the short- and long-term effects of a VTE prophylaxis program using the Caprini score in elderly patients undergoing minimally invasive colorectal cancer surgery with the ERAS protocol. METHODS: This retrospective cross-sectional study included 1,043 colorectal cancer patients requiring surgery from January 2017 to December 2019, divided into a control group (≤75 years) and an elderly group (>75 years), with 827 and 216 patients, respectively. The primary outcome was the incidence of VTE; secondary outcome was the incidence of postoperative complications, particularly bleeding. RESULTS: The incidence of VTE was 1.5% in the control group and 3.7% in the elderly group (P=0.061). Five patients (0.5%) experienced symptomatic VTE, and the Caprini score for all VTE patients was ≤8 points; thus, only mechanical prophylaxis was used. In the multivariable logistic regression, the Caprini score (P=0.024) and cancer stage (P=0.004) were selected. The odds ratios (95% confidence interval) of the Caprini score and TNM staging were 1.758 (1.078-2.867) and 6.152 (2.045-26.510), respectively. CONCLUSIONS: When the ERAS protocol was used for patients with colorectal cancer as perioperative care, the VTE risk was lower than that estimated by the Caprini score. Given that age is a recognized risk factor for major bleeding, criteria for the use of anticoagulation to prevent VTE, particularly in elderly patients, should be carefully evaluated, considering both the bleeding risks and the potential benefits of pharmacologic prophylaxis. TRIAL REGISTRATION: Clinical Research Information Service (CRIS; cris.nih.go.kr) identifier: KCT0007804.