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Table 1 Patient characteristics

From: Molecular changes during extended neoadjuvant letrozole treatment of breast cancer: distinguishing acquired resistance from dormant tumours

 

Dormant, n (%)

Resistant, n (%)

Total, n

p valuea

Total no. of patients

42

20

62

 

Total no. of samples

111

56

167

 

Age at diagnosis

 Mean

75

72

  

 Range

53–87

56–89

  

Tumour grade

   

0.39

 1

6 (14.3)

1 (5.0)

7

 

 2

27 (64.3)

10 (50.0)

37

 

 3

8 (19.0)

6 (30.0)

14

 

 NA

1 (2.4)

3 (15.0)

4

 

Tumour size

   

0.71

 T1

5 (11.9)

4 (20.0)

9

 

 T2

19 (45.2)

9 (45.0)

28

 

 T3

2 (4.8)

2 (10.0)

4

 

 T4

11 (26.2)

4 (20.0)

15

 

 NA

5 (11.9)

1 (5.0)

6

 

Nodal status

   

0.36

 N0

27 (64.3)

11 (55.0)

38

 

 N1

8 (19.0)

7 (35.0)

15

 

 N2

1 (2.4)

1 (5.0)

2

 

 N3

1 (2.4)

0

1

 

 NX

1 (2.4)

0

1

 

 NA

4 (9.5)

1 (5.0)

5

 

Metastasis status

   

1.00

 M0

34 (80.9)

18 (90.0)

56

 

 M1

2 (4.8)

0

2

 

 MX

1 (2.4)

1 (5.0)

2

 

 NA

5 (11.9)

1 (5.0)

6

 

ER score (Allred)

   

0.18

 6

1 (2.4)

0

1

 

 7

6 (14.3)

6 (30.0)

12

 

 8

35 (83.3)

14 (70.0)

49

 

HER status

   

0.69

 Negative

35 (83.3)

12 (60.0)

47

 

 Positive

6 (14.3)

3 (15.0)

9

 

 NA

1 (2.4)

5 (25.0)

6

 

Histological type

   

0.73

 IDC (no special type)

18 (42.9)

6 (30)

24

 

 ILC

8 (19.0)

4 (20)

12

 

 Mucinous

1 (2.4)

0

1

 

 NA

15 (35.7)

10 (50)

25

 

Molecular subtypeb

   

1.00

 Luminal A

21 (50.0)

9 (45.0)

30

 

 Luminal B

20 (47.6)

9 (45.0)

29

 

 HER2 enriched

0

1 (5.0)

1

 

 Basal-like

0

0

0

 

 Normal-like

0

0

0

 

 NA

1 (2.4)

1 (5.0)

2

 
  1. ER oestrogen receptor, IDC invasive ductal carcinoma, ILC invasive lobular carcinoma, NA not available
  2. aFisher exact test (p < 0.05, two-tailed)
  3. bAt diagnosis by PAM50 (genefu)