Abstract:Objective To explore the clinical application of the O-RADS combined with the ADNEX model, using a simplified flowchart, in evaluating the benign and malignant nature of adnexal tumors in middle-aged and elderly women.Methods A total of 95 middle-aged and elderly patients with adnexal tumors, detected by gynecological ultrasound and confirmed by surgery at the Affiliated Hospital of Guilin Medical University from November 2018 to November 2022, were selected. The adnexal tumors were classified according to the O-RADS and ADNEX models, with pathological histology serving as the gold standard. The diagnostic performance of the O-RADS, ADNEX model, and their combination was calculated, and the receiver operating characteristic (ROC) curves were plotted.Results Among the 95 patients, 46 had malignant tumors and 49 had benign tumors according to the pathological results. The sensitivity, specificity, positive predictive value, and negative predictive value of O-RADS categories 4 and 5 for diagnosing malignant adnexal tumors were 93.48% (95% CI: 0.811, 0.983), 69.39% (95% CI: 0.544, 0.813), 74.14%, and 91.89%, respectively. For the ADNEX model, these values were 89.13% (95% CI: 0.756, 0.959), 79.59% (95% CI: 0.652, 0.893), 80.39%, and 88.63%, respectively. The combined diagnostic sensitivity, specificity, positive predictive value, and negative predictive value of O-RADS and ADNEX were 93.48% (95% CI: 0.811, 0.983), 83.67% (95% CI: 0.698, 0.922), 84.31%, and 93.18%, respectively. The area under the ROC curve for diagnosing the nature of adnexal tumors was 0.814 for O-RADS, 0.844 for ADNEX, and 0.871 for their combination. The inter-observer agreement between two ultrasound physicians using O-RADS was excellent (κ =0.847, P =0.000). The time taken to classify using the simplified flowchart was shorter than that using the color-coded scoring table (42 minutes 39 seconds vs. 51 minutes 3 seconds).Conclusions The combined use of O-RADS and the ADNEX model offers higher diagnostic value for evaluating adnexal tumors in middle-aged and elderly women compared to using O-RADS alone. There is high consistency between different ultrasound physicians when using O-RADS, and the simplified flowchart allows for quicker classification, making it a valuable method for widespread adoption.