Evaluation of internal and shell stiffness in the differential diagnosis of breast non-mass lesions by shear wave elastography

Table 1 Comparison of general information between the benign group and the malignant non-mass lesions group

Group	Age (yr)	Maximum diameter (cm)	Location		Amenorrhea		Lactation history
			Left	Right	Yes	No	Yes	No
Benign (n = 66)	49.70 ± 10.38	2.10 ± 1.52	38	28	17	49	55	11
Malignant (n = 52)	50.56 ± 9.27	2.38 ± 1.64	27	25	13	39	44	8
t/χ2 value	-0.205	-0.959	0.376		0.009		0.035
P value	0.419	0.339	0.540		0.925		0.851