Table 1.

 Classifications for predicting malignancies

	Malignant ratio (%)		Mammographic findings	Total number	No. malignancies	Ratio of malignant cases (%)	P‐value	Odds ratio
Class I	0–20	Mass	Any mass shape‐circumscribed‐equivalent or lower	25	2	8.0	0.154	0.30
		Calcification	Punctate‐diffuse or grouped	42	7	16.7	0.525	0.69
Class II	20–40	Mass	Round‐circumscribed‐higher‐with calcification	19	5	26.3	0.921	1.23
			Oval‐circumscribed‐higher	12	3	25.0	0.881	1.15
			Oval‐microlobulated‐equivalent	8	3	37.5	0.572	2.07
		Calcification	Punctate‐segmental	28	6	21.4	0.907	0.94
			Amorphous‐diffuse or grouped	106	30	28.3	0.308	1.36
Class III	40–60	Mass	Round‐indistinct‐higher	4	2	50.0	0.485	3.45
			Lobular‐microlobulated or indistinct‐equivalent	6	3	50.0	0.277	3.45
		Calcification	Punctate‐grouped‐with FAD	9	5	55.6	0.589	4.31
			Amorphous‐segmental	86	37	43.0	<0.001	2.61
		FAD	Without distortion	123	50	40.7	<0.001	2.36
Class IV	60–80	Mass	Irregular, round or lobular‐microlobulated‐higher	62	46	74.2	<0.001	9.92
		Calcification	Punctate‐segmental‐with FAD	6	4	66.7	0.420	6.90
			Amorphous‐grouped or segmental‐with FAD	53	41	77.4	<0.001	11.79
			Pleomorphic‐grouped	43	33	76.7	<0.001	11.39
		ABT	Without distortion	5	4	80.0	0.014	13.80
Class V	80–100	Mass	Any mass shape‐spiculated‐any density	100	100	100.0	<0.001	–
			Any mass shape‐microlobulated‐any density‐with calcification	18	17	94.4	<0.001	58.67
			Lobular or irregular‐obscured or indistinct‐any findings	64	58	90.6	<0.001	33.36
		Calcification	Pleomorphic‐grouped or segmental with FAD	32	29	90.6	<0.001	33.36
			Pleomorphic‐segmental	58	53	91.4	<0.001	36.58
			Linear‐any distribution	16	16	100.0	<0.001	–
		FAD	With distortion	90	77	85.6	<0.001	20.44
		ABT	With distortion	20	20	100.0	<0.001	–