Table 4 Correlation between mRNA level of PD-L1 and variable clinicopathologic parameters in 39 HER2-positive breast cancers with fresh tissue.

From: Programmed death-ligand 1 (PD-L1) expression in tumour cell and tumour infiltrating lymphocytes of HER2-positive breast cancer and its prognostic value

 

mRNA level of PD-L1

p-value

Low (number (%))*

High (number (%))*

Age, mean ± SD **

55.65 ± 10.14 years

55.00 ± 10.85 years

0.849

Size, mean ± SD **

3.98 ± 2.09 cm

4.57 ± 3.16 cm

0.488

Side

  

0.571

Right

15 (65.2)

9 (56.3)

 

Left

8 (34.8)

7 (43.8)

 

Histologic grade

  

1.000

Grade 1, 2

8 (34.8)

6 (37.5)

 

Grade 3

15 (65.2)

10 (62.5)

 

Nuclear grade

  

0.432

Grade 1, 2

6 (26.1)

2 (12.5)

 

Grade 3

17 (73.9)

14 (87.5)

 

Necrosis

  

1.000

Absent

6 (26.1)

4 (25.0)

 

Present

17 (73.9)

12 (75.0)

 

Lymphovascular invasion

  

0.743

Absent

11 (47.8)

6 (37.5)

 

Present

12 (52.2)

10 (62.5)

 

Lymph node metastasis

  

0.291

Absent

9 (39.1)

3 (18.8)

 

Present

14 (60.9)

13 (81.3)

 

Stage

  

0.112

Early (stage I, II)

15 (65.2)

6 (37.5)

 

Advanced (stage III, IV)

8 (34.8)

10 (62.5)

 

HR expression

  

0.192

Positive

13 (56.5)

5 (31.3)

 

Negative

10 (43.5)

11 (68.8)

 

TILs level***

  

0.001

≤10%

11 (47.8)

1 (6.3)

 

20–60%

12 (52.2)

10 (62.5)

 

60%

0 (0.0)

5 (31.3)

 

TLSs around DCIS

  

0.264

Low

19 (82.6)

10 (62.5)

 

High

4 (17.4)

6 (37.5)

 

TLSs around invasive component

  

0.471

Low

18 (78.3)

10 (62.5)

 

High

5 (21.7)

6 (37.5)

 
  1. *except for age and sizes. **The t-test was performed and the equality of variances was assumed. SD, standard deviation. ***The linear-by-linear association was carried out. The Pearson’s Chi-square test or Fisher’s exact test was used as appropriate for the other variables.