MOESM1 of Diagnostic extended usefulness of RMI: comparison of four risk of malignancy index in preoperative differentiation of borderline ovarian tumors and benign ovarian tumors ZhangShuang YuShan HouWenying LiXiaoying NingChunping WuYingnan ZhangFeng JiaoYu LeeLeo SunLitao 2019 Additional file 1: Table S1. Group: 1 represents benign ovarian tumor, 2 represents BOT. M: 0 represents premenopausal status, 1 represents postmenopausal status. U represents ultrasound score.