Table 1.

Characteristics of the study population

	Benign (n = 121)	Malignant (n = 65)
Lesion size (mm)	14.1 ± 15.3	23.7 ± 13.8
Mean age	49.6 ± 10.8	52.9 ± 11.6
Menopausal statusa
premenopausal	75	32
postmenopausal	46	33
Breast densitya
non-dense	42	29
dense	79	36
Background parenchymal enhancementa
minimal to mild	85	51
moderate to marked	36	14

^aThe numbers of menopausal status, background parenchymal enhancement and breast density are calculated on the basis of the number of lesion, other than number of patients, as several patients had multiple lesions