Accuracy of axillary ultrasound in preoperative nodal staging of breast cancer - size of metastases as limiting factor

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Table 1 Patient characteristics (n = 470)

	Patients	pN+	%	p
Age (years)				n.s.
≤50	74	28	37.8
>50	396	138	34.8
BMI				n.s.
<25	180	60	33.3
25-29.9	165	59	35.8
≥30	124	46	37.1
Tumour stage				<0.001
pT1	278	62	22.3
pT2	164	81	49.4
pT3 & pT4	28	23	82.1
Histological subtype				0.045
Ductal	340	128	37.6
Lobular	44	16	36.4
Others	86	22	25.6
Grading				<0.001
G1	67	6	9
G2	261	88	33.7
G3	142	72	50.7
Lymphangiosis				<0.001
No	278	33	11.9
Yes	192	133	69.3
Growth pattern				<0.001
Unifocal	427	139	32.6
Multicentric	40	25	62.5
ER status				n.s.
Positive	383	129	33.7
Negative	87	37	42.5
PR status				0.024
Positive	339	109	32.2
Negative	131	57	43.5
HER2 status				n.s.
Negative	432	150	34.7
Positive	38	16	42.1
Ki-67				<0.001
≤14%	161	38	23.6
>14%	282	122	43.3
Total	470	166	35.3