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Table 2 Mean estradiol levels according to subgroups

From: Prognostic effect of preoperative serum estradiol level in postmenopausal breast cancer

   Estradiol level (Mean±SD, pg/mL) p value
Tumor size <2 cm 13.69±7.17 0.75
  ≥2 cm 13.97±8.28  
Nodal status N0 13.93±7.99 0.71
  N1-3 13.59±7.09  
ER Negative 12.97±7.37 0.69
  Positive 14.36±7.85  
PR Negative 13.41±7.52 0.27
  Positive 14.37±7.89  
Her-2 Negative 14.09±7.80 0.81
  Positive 14.40±7.33  
Histologic grade Grade 1 or 2 13.91±8.05 0.80
  Grade 3 13.68±7.25  
Nuclear grade Grade 1 or 2 13.78±8.38 0.89
  Grade 3 13.90±7.11  
  1. Abbreviations: SD Standard deviation, ER estrogen receptor, PR Progesterone receptor.