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Table 1 Correlation of bone metastasis and breast cancer subtypes

From: Role of estrogen receptors and Src signaling in mechanisms of bone metastasis by estrogen receptor positive breast cancers

1st metastatic site

Bone

Other sites

p value

ER ≥ 10%

43

38

0.002*

ER < 10%

11

33

PR ≥ 10%

34

25

0.003*

PR < 10%

19

43

ER ≥ 10% or HER2 (+)

47

50

0.027*

ER < 10% and HER2 (−)

7

21

  1. ER estrogen receptor, PR progesterone receptor, HER2 human epidermal growth factor receptor 2. The positivity of the receptors was defined in “Methods”. * p value analyzed by Chi Square test. Other sites included lung, liver, brain and visceral organs