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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.
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