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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