Table 2.

Demographic and lesion characteristics

	Benign	Malignant	Statistical significance (P value)
Gender (F/M)	316/0	211/1	NA
Age (y)	49±15 (18-88)	61±12 (27-89)	<0.0001
Mass Size (mm)	14±8.6 (4-60)	18.5±11.9 (5-72)	<0.0001
BI-RADS			<0.0001
2	2	0
3	17	0
4	287	115
5	10	96

Mean values of age and tumour size are shown with standard deviations and minimum–maximum intervals in parentheses. Statistical comparison of age, mass size and BI-RADS between benign and malignant groups was performed using a Wilcoxon rank sum test (last column), a P value < 0.05 was considered to reflect statistical significance.