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Table 1 Distribution of patient baseline characteristics

From: Endocrine-responsive lobular carcinoma of the breast: features associated with risk of late distant recurrence

 

Number

Percentage

Age group

 < 40

75

4.0

 40–49

570

30.4

 50–59

540

28.8

 60+

687

36.7

Median age (IQR)

54 (47–64)

Menopausal status

 Pre-menopausal

788

42.1

 Post-menopausal

1084

57.9

pN

 pN0

1103

58.9

 pN1

449

24.0

 pN2

131

7.0

 pN3

189

10.1

pT

 pT1

1060

56.6

 pT2

612

32.7

 pT3/4

200

10.7

Tumor grade

 G1

279

14.9

 G2

1232

65.8

 G3

209

11.2

 Unknown

152

8.1

Vessel invasion

 No

1797

96.0

 Yes

75

4.0

Local treatment

 Mastectomy w/o RT

355

19.0

 Mastectomy w RT

245

13.1

 Quadrantectomy w/o RT

36

1.9

 Quadrantectomy w RT

1236

66.0

Adjuvant treatment

 ET

1481

79.1

 CT+ET

391

20.9

Hormonal therapy

 Pre-menopausal

  TAM

107

13.6

  TAM+LHRH

556

70.5

  AI+LHRH

58

7.4

  Other

67

8.5

 Post-menopausal

  TAM

483

44.6

  AI

463

42.7

  Other

138

12.7

Receptor status

 Incompletely expressed (ER < 50 or PgR < 50)

841

44.9

 Highly expressed (ER ≥ 50 and PgR ≥ 50)

1031

55.1

Ki-67

 < 20%

1375

73.5

 ≥ 20%

497

26.5

HER2

 Not expressed

1727

92.3

 Intense and complete

72

3.8

 Unknown

73

3.9

ER mean (SD)/median (IQR)

83 (17)/90 (80–95)

PgR mean(SD)/median (IQR)

51 (37)/60 (10–90)

Ki-67 mean(SD)/median (IQR)

15 (9)/14 (9–20)