Introduction: Ovarian cancer is one of the top three deadliest cancer in women and diagnosing this disease still leaves some challenges to overcome. Therefore, this study aimed to compare the diagnostic accuracy of the Risk of Malignancy Index (RMI) to International Ovarian Tumor Analysis (IOTA) simple rules in adnexal masses.
Methods: A retrospective study was conducted involving 29 patients diagnosed with ovarian tumors. RMI and IOTA Simple Rules were determined preoperatively and compared with histopathology examination as the gold standard. The accuracy of both methods was analyzed using SPSS.
Results: The mean age of the patients in this study was 45 years old. The sensitivity and specificity of RMI were 65% and 55,5%, respectively. The sensitivity and specificity of the IOTA SR were 90% and 55,5%, respectively. The values for the AUC for RMI and IOTA SR are 0.342 and 0.728, respectively. The AUC of the IOTA SR was significantly higher than the RMI (P < 0.005).
Conclusions: IOTA SR is a relatively useful diagnostic model in characterizing adnexal masses, while the RMI only performs fairly.