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Table 2 Univariate comparisons of baseline characteristics.

From: The Gene expression Grade Index: a potential predictor of relapse for endocrine-treated breast cancer patients in the BIG 1–98 trial

  Case/Control   
  Case Control Overall  
Characteristic N (%) N (%) N P-value*
Menopausal category       
   Postmen. before chemo 9 90.0 34 89.5 43  
   Postmen. after chemo 1 10.0 4 10.5 5 0.99
Tumor size       
   ≤ 2 cm 1 10.0 15 39.5 16  
   > 2 cm 9 90.0 23 60.6 32 0.13
Tumor grade . .     
   Grade 1    2 5.3 2  
   Grade 2 3 30.0 27 71.1 30  
   Grade 3 7 70.0 9 23.7 16 0.03
Nodal status       
   N-/Nx 4 40.0 14 36.8 18  
   N+ 6 60.0 24 63.2 30 0.99
ER and PgR status       
   ER-pos/PgR-pos 5 50.0 33 86.8 38  
   ER-pos/PgR-neg 5 50.0 5 13.2 10 0.02
HER2 Positive       
   No 8 80.0 29 76.3 37  
   Yes 1 10.0 1 2.6 2  
   Unknown 1 10.0 8 21.0 9 0.41
Local therapy       
   BCS and radiotherapy 5 50. 0 24 63.2 29  
   BCS and no radiotherapy . . 1 2.6 1  
   Mastectomy and radiotherapy 4 40.0 9 23.7 13  
   Mastectomy and no radiotherapy 1 10.0 4 10.5 5 0.73
Adjuvant or neoadjuvant chemo       
   No 6 60.0 24 63.2 30  
   Yes 4 40.0 14 36.8 18 0.99
Treatment       
   Letrozole 7 70.0 21 55.3 28  
   Tamoxifen 3 30.0 17 44.7 20 0.49
  1. *Fisher's exact p-value