Table 3.

Patient characteristics.

Age	n	%	ACR	n	%
20–30	0	0	A	2	3.23
30–40	4	6.45	B	30	48.39
40–50	9	14.52	C	24	38.71
50–60	17	27.42	D	6	9.68
60–70	11	17.74
70–80	17	27.42
80–90	4	6.45
All	62

Breast density according to classification of the American College of Radiology (ACR): A = almost entirely fatty tissue, B = Scattered areas of fibroglandular denisty, C = Heterogenously dense tissue, D = Extremely dense tissue.