Table 1.

Baseline radiological and clinical findings.

Feature		Number	% of total
Type of mammogram	Digital	206	66
	Film-screen	79	25
	Not known	26	8
Age at mammogram	<60	130	42
	≥60	181	58
Side	Left	148	48
	Right	163	52
Sitea	Upper outer quadrant	173	56
	Upper inner quadrant	53	17
	Lower outer quadrant	42	14
	Lower inner quadrant	51	16
	Retroareolar	24	8
	Not known	9	3
Microcalcifications	Present	282	91
	Absent	23	7
	Not known	6	2
Microcalcification pattern	Casting	86	30
	Granular	139	49
	Punctate	42	15
	Other	1	0
	Not known	14	5
Microcalcification distribution	Diffuse	22	8
	Grouped	110	39
	Linear	21	7
	Regional	30	11
	Segmental	42	15
	Not known	57	20
Predominant mammographic feature	Calcification	258	83
	Mass - well defined	10	3
	Mass - ill defined	22	7
	Distortion	5	2
	Spiculate Mass	1	0
	Other	8	3
	Not known	7	2
Maximum lesion size (mm)	1–10	82	26
	11–20	57	18
	21–40	65	21
	41–60	39	13
	61–80	25	8
	>80	20	6
	Not known	23	7
BIRADs breast density	a	21	7
	b	123	40
	c	83	27
	d	16	5
	Not known	68	22

^aMore than one site can be specified per case.