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Table 1 Association between race/ethnicity and clinical-pathological features

From: Triple-negative breast cancers are increased in black women regardless of age or body mass index

Category (p-value)*

White

Black

Hispanic

Other

All

 

N (%)

Race

148 (36)

177 (43)

43 (10)

47 (11)

415

Age (years) (0.04)

     

   ≤ 50 (premenopausal)

37 (25)

53 (30)

20 (47)

15 (32)

125 (30)

   >50 (postmenopausal)

111 (75)

124 (70)

23 (53)

32 (68)

290 (70)

ER positive (0.0003)

115 (80)

104 (59)

35 (81)

35 (74)

289 (70)

PR positive (<0.0001)

105 (72)

90 (51)

36 (84)

22 (47)

253 (62)

Her2 positive (0.03)

11 (7.5)

26 (15)

5 (12)

11 (23)

53 (13)

Triple negative (0.0002)

19 (13)

52 (30)

5 (12)

5 (11)

81 (20)

Grade (0.01)

     

   1

27 (19)

14 (8.5)

7 (16)

6 (13)

54 (14)

   2

70 (49)

72 (44)

20 (46)

14 (31)

176 (45)

   3

45 (32)

78 (48)

16 (37)

25 (56)

164 (42)

T (tumour size) (0.64)

     

   1

76 (58)

94 (58)

22 (54)

22 (52)

214 (57)

   2

44 (33)

56 (35)

12 (29)

15 (36)

127 (34)

   3

9 (6.8)

12 (7.4)

6 (15)

4 (9.5)

31 (8)

   4

3 (2.3)

0 (0)

1 (2.4)

1 (2.4)

5 (1)

No. of positive nodes (0.50)

     

   0

64 (59)

66 (47)

18 (56)

22 (56)

170 (53)

   1 to 3

27 (25)

43 (31)

11 (34)

8 (21)

89 (28)

   4 to 9

11 (10)

20 (14)

2 (6)

8 (21)

41 (13)

   ≥ 10

6 (6)

11 (8)

1 (3)

1 (3)

19 (6)

BMI (kg/m 2 ) (0.01)

     

   Underweight/normal

39 (27)

32 (18)

5 (12)

19 (40)

95 (23)

   Overweight

45 (31)

47 (27)

19 (44)

11 (23)

122 (30)

   Obesity I

32 (22)

55 (31)

11 (26)

13 (27)

111 (27)

   Obesity II

20 (14)

26 (15)

3 (7)

2 (4.3)

51 (13)

   Obesity III

7 (4.9)

15 (8.6)

5 (12)

2 (4.3)

29 (7)

  1. * test of homogeneity of proportions
  2. BMI = body mass index; ER = oestrogen receptor; HER = human epidermal growth factor receptor; PR = progesterone receptor.