Table 1. The FV, cutoff and frequencies for each subtype.

Features	LA				LB				HER2				TN
	FV	Cutoff	Frequencies	Final selection	FV	Cutoff	Frequencies	Final selection	FV	Cutoff	Frequencies	Final selection	FV	Cutoff	Frequencies	Final selection
Age	0.792	1.000	0	no	0.978	1.000	0	no	0.972	0.779	998	yes	0.551	0.771	0	no
Size	0.722	1.000	0	no	0.806	1.000	0	no	0.756	0.851	0	no	0.964	0.774	885	no
Shape	0	0.956	0	no	0.034	0.952	0	no	0.011	0.428	0	no	0.999	0.463	992	yes
Orientation	0.002	0.962	0	no	0.218	0.972	0	no	0.183	0.451	0	no	0.013	0.452	0	no
Margin border	0	0.945	0	no	0.252	0.956	0	no	0	0.539	0	no	0.036	0.399	996	yes
Margin contour	0.566	0.983	0	no	0.741	0.985	0	no	0.117	0.569	0	no	0.845	0.452	462	no
Post. acoustic	1	0.987	999	yes	0.992	0.987	397	no	1	0.532	999	yes	0.545	0.496	662	no
Calcification	0.245	0.966	0	no	0.608	0.966	0	no	1	0.437	999	yes	0.825	0.421	993	yes
Boundary	1	0.926	999	yes	0.999	0.954	999	yes	0.026	0.402	0	no	0.461	0.432	0	no
Echogenicity	0	0.913	0	no	0	0.937	0	no	0	0.100	0	no	0	0.117	0	no
Adler	1	0.988	117	no	1	0.993	999	yes	0.567	0.503	934	yes	1	0.662	999	yes
BI-RADS	0.363	0.956	0	no	0.824	0.966	0	no	0	0.441	0	no	0.209	0.428	0	no