Table 3 Tumour characteristics associated with “Over St Gallen” treatment.

From: Adequacy of early-stage breast cancer systemic adjuvant treatment to Saint Gallen-2013 statement: the MCC-Spain study

Variable

Category

n Over St Gallen/n included

RRR (95% CI)

p

Age

(each 10 years)

 

0.70 (0.62–0.81)

< 0.001

Pathological stage

0

0/36

I

56/519

1 (ref.)

II

187/597

4.15 (2.90–5.94)

< 0.001

Grade of differentiation

I (well differentiated)

69/260

1 (ref.)

II (moderately differentiated)

115/367

1.26 (0.84–1.89)

0.27

III (poorly differentiated)

10/222

0.09 (0.04–0.19)

< 0.001

Missing

49/303

1.03 (0.55–1.92)

0.94

Histological type

Ductal

200/918

1 (ref.)

Lobular

20/82

1.72 (0.94–3.17)

0.08

Papilar

1/16

0.31 (0.04–2.53)

0.28

Others

22/136

0.87 (0.50–1.50)

0.61

Progesterone receptors

Negative

14/262

1 (ref.)

Positive

229/887

8.12 (4.41–14.9)

< 0.001

Missing

0/3

Oestrogen receptors

Negative

12/155

1 (ref.)

Positive

231/996

5.71 (2.97–11.0)

< 0.001

Missing

0/1

HER2 receptors

Negative

224/953

1 (ref.)

Positive

19/199

0.46 (0.26–0.81)

0.007

Intrinsic subtype

Luminal A-like

221/687

1 (ref.)

Luminal B-like

12/324

0.07 (0.04–0.13)

< 0.001

HER2 positive (non-luminal)

7/52

0.30 (0.11–0.83)

0.02

Triple negative (ductal)

3/89

0.03 (0.01–0.11)

< 0.001

  1. Relative risk ratios (RRR) are adjusted for age at diagnosis and hospital of recruitment.