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Table 1 Clinical characteristics of the 189 breast cancer patients in the study

From: Estrogen receptor-α polymorphism in a Taiwanese clinical breast cancer population: a case–control study

Characteristic

Proportion

Tumor type

 

   Infiltrating ductal carcinoma

86.7%

   Others

13.3%

Age of onset (years)

 

   <40

20.1%

   ≥40

79.9%

Familial history

 

   Negative

90.6%

   Positive

9.4%

Tumour size

 

   <5 cm

87.5%

   ≥5 cm

12.5%

LN metastasis

 

   Absent

59.0%

   Present

41.0%

ER expression in breast cancer tissue

 

   Negative

31.7%

   Positive

68.3%

  1. ER, estrogen receptor; LN, lymph node.