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Table 4 Tumor characteristics in relation to self-reported milk production

From: Excessive milk production during breast-feeding prior to breast cancer diagnosis is associated with increased risk for early events

Table 4

All patients

Nulliparous

Milk production of first child -Almost no milk

Milk production of first child -Insufficient

Milk production of first child -Adequate

Milk production of first child -Excessive

Ptrend

 

n=592

n=89

n=25

n=129

n=245

n=79

 
 

n (percent)

n (percent)

n (percent)

n (percent)

n (percent)

n (percent)

 

pT

      

0.79

0

14 (2.4%)

3 (3.4%)

2 (8.0%)

2 (1.6%)

3 (1.2%)

1 (1.3%)

 

1

424 (71.6%)

61 (68.5%)

15 (60.0%)

89 (69.0%)

185 (75.5%)

57 (72.2%)

 

2

144 (24.3%)

23 (25.8%)

8 (32.0%)

36 (27.9%)

54 (22.0%)

19 (24.1%)

 

3

9 (1.5%)

2 (2.2%)

0

2 (1.6%)

3 (1.2%)

2 (2.5%)

 

4

1 (0.2%)

0

0

0

0

0

 

Number of axillary lymph nodes

      

0.14

0

368 (62.4%)

61 (68.5%)

18 (72.0%)

81 (62.8%)

151 (61.9%)

43 (55.1%)

 

1-3

167 (28.3%)

21 (23.6%)

4 (16.0%)

38 (29.5%)

72 (29.5%)

24 (30.8%)

 

4+

55 (9.3%)

7 (7.9%)

3 (12.0%)

10 (7.8%)

21 (8.6%)

11 (14.1%)

 

Missing

2

0

0

0

1

1

 

Histologic grade

      

0.29

I

157 (26.6%)

22 (24.7%)

11 (44.0%)

31 (24.2%)

66 (26.9%)

23 (29.1%)

 

II

308 (52.1%)

47 (52.8%)

12 (48.0%)

73 (57.0%)

123 (50.2%)

39 (49.4%)

 

III

126 (21.3%)

20 (22.5%)

2 (8.0%)

24 (18.8%)

56 (22.9%)'

17 (21.5%)

 

Missing

1

0

0

1

0

0

 

Hormone receptor status

       

ER+

502 (86.7%)

76 (88.4%)

22 (95.7%)

108 (84.4%)

207 (85.9%)

71 (91.0%)

0.68

ER-

77 (13.3%)

10 (11.6%)

1 (4.3%)

20 (15.6%)

34 (14.1%)

7 (9.0%)

 

PgR+

402 (69.4%)

61 (70.9%)

18 (78.3%)

85 (66.4%)

162 (67.2%)

58 (74.4%)

0.70

PgR-

177 (30.6%)

25 (29.1)

5 (21.7%)

43 (33.6%)

79 (32.8%)

20 (25.6%)

 

Missing

13

3

2

1

4

1

 

ER+ PgR+

398 (68.7%)

60 (69.8%)

18 (78.3%)

85 (66.4%)

159 (66.0%)

58 (74.4%)

0.76

ER+ PgR-

104 (18.0%)

16 (18.6%)

4 (17.4%)

23 (18.0%)

48 (19.9%)

13 (16.7%)

0.98

ER- PgR+

4 (0.7%)

1 (1.2%)

0

0

3 (1.2%)

0

0.65

ER- PgR-

73 (12.6%)

9 (10.5%)

1 (4.3%)

20 (15.6%)

31 (12.9%)

7 (9.0%)

0.60

Missing

13

3

2

1

4

1