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Table 1 Schematic presentation of four different RMI score algorithms

From: Diagnostic extended usefulness of RMI: comparison of four risk of malignancy index in preoperative differentiation of borderline ovarian tumors and benign ovarian tumors

Variants Ultrasound Score (U)a Menopausal Score (M) Tumor Size (S), cmb
RMI I = U × M × CA-125 U = 0 (0 parameter) M = 1 (premenopausal) Not applicable
U = 1 (1 parameter) M = 3 (postmenopausal)  
U = 3 (≥2 parameters)   
RMI II = U × M × CA-125 U = 1 (0 or 1 parameter) M = 1 (pre-menopausal) Not applicable
U = 4 (≥2 parameters) M = 4 (postmenopausal)  
RMI III = U × M × CA-125 U = 1 (0 or 1 parameter) M = 1 (premenopausal) Not applicable
U = 3 (≥2 parameters) M = 3 (postmenopausal)  
RMI IV = U × M × S × CA-125 U = 1 (0 or 1 parameter) M = 1 (premenopausal) S = 1 (< 7)
U = 4 (≥2 parameters) M = 4 (postmenopausal) S = 2 (≥7)
  1. aParameters: presence of a multilocular cystic lesion, solid areas, a bilateral lesion, ascites, and intra-abdominal metastasis
  2. bSingle greatest diameter