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Table 1 Demographics of the heathy and breast cancer cohorts

From: Exploring breast tissue microbial composition and the association with breast cancer risk factors

 

Healthy

Breast cancer

Total N

403

76

Age (median)

50

56

Menopausal status (%)

  

 Pre

180 (44%)

24 (42%)

 Post

195 (49%)

52 (68%)

 Uterine ablation

28 (7%)

 

Body mass index (%)

  

 < 30

136 (34%)

11 (15%)

 ≥ 30

267 (66%)

17 (22%)

 N.A

 

48 (63%)

Racial background (%)

  

 Caucasian

294 (73%)

59

 African American

78 (20%)

13

 Asian

22 (5%)

1

 Other/N.A

9 (2%)

3

Hispanic (%)

24 (6%)

2

Parity (%)

  

 Nulliparous

21 (5%)

N.A

 Parous

382 (95%)

N.A

Age at menarche (%)

  

 < 12

84 (20%)

N.A

 ≥ 12

319 (80%)

N.A

Ever breastfed

358 (89%)

N.A

Ever smoker (%)

88 (22%)

N.A

Tyrer-Cuzick score > 20

54

N.A

Prior treatment (chemo, Surgery)

28 (7%)

35 (56%)

Developed breast cancer later

24 (6%)

N.A

Tumor biomarkers

  

 ER positive

N.A

47 (62%)

 PR positive

N.A

40 (52%)

 HER2 positive

N.A

26 (35%)

Tumor grade

  

 1

N.A

8

 2

N.A

25

 3

N.A

18

Tumor histology

  

 IDC

N.A

17

 ILC

N.A

2

 DCIS

N.A

2

 LCIS

N.A

1

 AC

N.A

1

 C

N.A

2

  1. ER estrogen receptor, PR progesterone receptor, HER2 human epidermal growth factor receptor 2, AC adenocarcinoma, C carcinoma, DCIS ductal carcinoma in situ, LCIS lobular carcinoma in situ, ILC infiltrating lobular carcinoma, IDC invasive ductal carcinoma