Abstract:Objective To explore the risk factors associated with prolonged operation time in retroperitoneal laparoscopic adrenalectomy (RLA).Methods A retrospective research was conducted with data gathered from 420 cases who underwent RLA for adrenal lesions from Jan 2016 to Dec 2021. Demographic and hospital admission data were collected from these patients, including sex, age, body mass index (BMI), preoperative comorbidities, history of previous abdominal surgery, operative time, lesion diameter, postoperative pathology, tumor lateralization and so on. Patients were separated into two groups according to the operative time, using the 75th percentiles (140 min) as the cut-off point. Furthermore, the univariate and multivariate Logistic analysis were employed to determine the risk factors related to prolong operation time. The receiver operator characteristic curve (ROC curve) was plotted and the area under the curve (AUC) calculated to explore the predictive value of the risk factors.Results Across all patients, 96 (22.86%) referred to prolonged operation time. Results from univariate Logistic regression proved that male, BMI ≥ 31 kg/m2, pheochromocytoma, adrenal cortical hyperplasia, surgeon experience ( ≤ 30), tumor diameter ≥ 3.6 cm, and surgical method (total resection) were associated with prolonged operation time in RLA. The multivariate Logistic regression indicated that male, BMI ≥ 31 kg/m2, pheochromocytoma, surgeon experience ≤ 30, and tumor diameter ≥ 3.6 cm were independent risk factors for RLA. AUC was 0.735 (95%CI: 0.678 ~ 0.793) in the multivariate Logistic regression model for predicting prolonged operation time.Conclusion BMI, tumor size, pathology, surgical procedure and gender were associated with the increased risk of prolong operation time in RLA. These findings contribute essential information for the planning and development of a better treatment protocol for patients undergoing RLA.