Table 1 Summary of all the variables considered in the study

Age

  < 40 years

12

11

23

  ≥ 40 years

88

102

190

 Premenopausal

33

37

70

 Postmenopausal

67

76

143

Histological type

 IDC (NST)

76

89

165

 ILC

16

14

20

 Other

18

10

28

Axillary involvement

 Yes

47

39

86

 No

53

74

127

pN( +) status

 N0

53

75

128

 N1

20

27

47

 N2

17

9

26

 N3

10

2

12

Stage

 I

19

58

77

 II

54

43

97

 III

29

10

39

Histological grade

 G1

3

10

13

 G2

69

69

138

 G3

28

34

62

Ki-67%

  < 20

41

49

90

  > 20

59

64

123

ER status

 ER + 

77

92

169

 ER − 

23

21

44

PR status

 PR + 

20

45

65

 PR − 

80

68

148

Her2/new status

 Her 2( +)

24

16

40

 Her 2( −)

76

97

173

LVI status

 Positive

52

20

72

 Negative

48

93

141

Metastatic lymph nodes

 Positive

47

38

85

 Negative

53

75

128

Molecular subtypes

 Lum. A

35

42

77

 Lum. B/Her2 neg

32

43

75

 Lum. B/Her2 poz

12

8

20

 Her2 positive

11

8

19

 Triple negative

10

12

22

 IL-7/median (25–75%)

66.1 (31.5–183.3)

54.7 (18.0–134.3)