Table 5 Significant predictors of false-negative axillary ultrasound (false-negative ratio = OR) in 470 patients with breast cancer according to univariate and multivariate logistic regression

Tumour stage

T1

0,004

1.55 (1.17-2.04)

n.s.

T2-4

1

Grading

G1/2

0.003

1.61 (1.16-2.24)

n.s.

G3

1

Lymphangiosis

No

0.001

1.72 (1.33-2.22)

n.s.

Yes

1

ER status

Positive

0.024

1.63 (1.03-2.59)

n.s.

Negative

1

PR status

Positive

0.014

1.54 (1.08-2.22)

n.s.

Negative

1

HER2 status

Negative

0.007

2.99 (1.067-8.36)

n.s.

Positive

1

Ki-67

≤14%

<0.001

1.76 (1.34-2.30)

n.s.

>14%

1

Size of nodal metastasis

≤10 mm

<0.001

2.66 (1.81-3.91)

0,001

>10 mm

1

Nodal stage

N1

<0.001

1.96 (1.41-2.73)

n.s.

N2-3

1

Capsular infiltration

No

<0.001

2.22 (1.59-3.11)

n.s.

Yes

1