Predictive Value of Laboratory Indicators for Endoleak During Short-Term Follow-Up After EVAR

Background: The aim of this study was to explore the predictive value of endoleak in short-term follow-up after endovascular aortic repair (EVAR) of abdominal aortic aneurysm (AAA) via perioperative laboratory indicators.Methods: A retrospective study included 200 consecutive patients who received standard EVAR treatment for AAA and were followed-up for 1 year. Binary logistic regression analysis was used to evaluate the correlation of the level and changes of perioperative laboratory indica-tors with the endoleak events during the follow-up. The receiver operating characteristic (ROC) curve was used to assess the predictive value of laboratory indicators for endoleak.Results: A total of 45 cases of endoleak events occurred during follow-up. Binary logistic regression analysis showed that postoperative fibrinogen decrease, perioperative lymphocyte difference and lymphocyte monocyte ratio (LMR) difference were independent risk factors for short term endoleak. The area under the ROC curve (AUC) of postoperative fibrinogen was 0.596, the cut-off value was 284 mg/dl, and the corresponding specificity and sensitivity were 0.644 and 0.568. The AUC of the lymphocyte difference was 0.622, the cut-off value was-0.45 x 109/L, and the corresponding specificity and sensitivity were 0.651 and 0.568. The AUC of the LMR difference was 0.597, the cut-off value was-1.719, and the corresponding specificity and sensitivity were 0.631 and 0.614.Conclusions: Decrease of postoperative fibrinogen, increase of lymphocyte difference and LMR difference were independent predictive factors for endoleak in short-term follow-up after EVAR for AAA.