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Table 1 Characteristics of Patients with Different Tumor Subtypes

From: Frequently increased epidermal growth factor receptor (EGFR) copy numbers and decreased BRCA1 mRNA expression in Japanese triple-negative breast cancers

Variables Total Triple negative Non-triple negative P value
  N = 486 (100%) N = 71 (15%) N = 415 (85%)  
  No. % No. % No. %  
Age, years        0.49
   ≤50 198 41 32 44 166 40  
   >50 288 59 39 56 249 60  
Size        0.23
   ≤2 cm 181 37 21 30 160 39  
   >2 cm 288 59 46 65 242 58  
   Unknown 17   4 5 13 3  
Nodal status        0.02
   Negative 275 57 48 68 227 55  
   Positive 192 40 19 27 173 42  
   Unknown 19 3 4 5 15 3  
Histology        0.14
   Ductal 454 94 66 93 388 93  
   Lobular 16 3 0 0 16 4  
   Other 16 3 5 7 11 3  
Grade        <0.0001
   1 92 19 4 6 88 21  
   2 273 56 32 45 241 58  
   3 101 21 34 48 67 16  
   Unknown 20 4 1 1 19 5  
TP53 expression        <0.0001
   Negative 392 81 43 61 349 84  
   Positive 92 19 28 39 64 15  
   Unknown 2 0 0 0 2 1  
Ki67 expression        <0.0001
   Low 333 69 34 48 299 72  
   High 150 31 37 52 113 27  
   Unknown 3 1 0 0 3 1