Table 2 Mean tumor-infiltrating lymphocyte levels (%) according to tumor characteristics.

From: Relationship of the standard uptake value of 18F-FDG-PET-CT with tumor-infiltrating lymphocytes in breast tumors measuring ≥ 1 cm

 

N

Mean (SD)

p value

Histology1

  

0.001

 IDC

174

24.20 (± 21.98)

 

 ILC

17

11.27 (± 11.20)

 

 Others

11

13.64 (± 26.77)

 

T stage2

  

0.426

 1

118

21.03 (± 21.34)

 

 2–3

84

24.19 (± 22.65)

 

N stage2

 0

148

23.41 (± 23.37)

0.536

 1–3

54

19.85 (± 16.98)

 

Histologic grade2,3

  

 < 0.001

 I or II

156

18.70 (± 19.68)

 

 III

45

35.74 (± 25.09)

 

Nuclear grade2,3

  

 < 0.001

 1 or 2

136

17.54 (± 17.86)

 

 3

65

33.29 (± 25.99)

 

Subtypes1

  

 < 0.001

 Luminal/HER2(−)

145

17.38 (± 15.90)

 

 HER2(+)

32

36.32 (± 27.97)

 

 TNBC

25

37.78 (± 29.58)

 

Ki-67 labeling index2,3

  

0.003

  < 14%

111

17.29 (± 17.45)

 

  ≥ 14%

90

28.21 (± 24.29)

 

SUVmax2

  

0.028

  < 4

85

18.33 (± 21.25)

 

  ≥ 4

117

25.33 (± 22.10)

 
  1. IDC invasive ductal carcinoma, ILC invasive lobular carcinoma, HER2 human epidermal growth factor receptor-2, TNBC triple-negative breast cancer, SUV standard uptake value, SD standard deviation.
  2. 1Kruskal–Wallis test.
  3. 2Mann–Whitney U test.
  4. 3Missing value.
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