Table 4 Tumour characteristics associated with “Under 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 Under St Gallen/n included

RRR (95% CI)

p

Age

(each 10 years)

 

1.08 (0.06–1.21)

0.21

Pathological stage

0

32/36

21.6 (7.21–64.5)

< 0.001

I

172/519

1 (ref.)

II

182/597

1.34 (1.00–1.78)

0.05

Grade of differentiation

I (well differentiated)

61/260

1 (ref.)

II (moderately differentiated)

97/367

1.38 (0.91–2.09)

0.13

III (poorly differentiated)

84/222

1.88 (1.21–2.93)

0.005

Missing

144/303

3.72 (2.21–6.29)

< 0.001

Histological type

Ductal

288/918

1 (ref.)

Lobular

31/82

1.40 (0.82–2.41)

0.22

Papilar

5/16

0.72 (0.23–2.25)

0.57

Others

62/136

1.96 (1.28–2.99)

0.002

Progesterone receptors

Negative

110/262

1 (ref.)

Positive

275/887

0.67 (0.49–0.94)

0.02

Missing

1/3

0.67 (0.06–7.86)

0.75

Oestrogen receptors

Negative

51/155

1 (ref.)

Positive

335/996

1.13 (0.76–1.67)

0.54

Missing

0/1

HER2 receptors

Negative

272/953

1 (ref.)

Positive

114/199

3.44 (2.40–4.93)

< 0.001

Intrinsic subtype

Luminal A-like

168/687

1 (ref.)

Luminal B-like

173/324

3.63 (2.59–5.09)

< 0.001

HER2 positive (non-luminal)

28/52

4.38 (2.23–8.60)

< 0.001

Triple negative (ductal)

17/89

0.70 (0.39–1.28)

0.25

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