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Table 1 Main characteristics of patients

From: Genomic aberrations in young and elderly  breast cancer patients

Characteristic The Cancer Genome Atlas (N = 780)
  ≤45 years of age 46–69 years of age ≥70 years of age P value
Number 125 486 169  
Tumor size     
 ≤2 cm 30 (24 %) 135 (28 %) 43 (26 %) 0.64
 >2 cm 95 (76 %) 351 (72 %) 126 (74 %)  
Nodal status     
 Negative 47 (38 %) 241 (49 %) 83 (49 %) 0.05
 Positive 78 (62 %) 245 (51 %) 86 (51 %)  
Histology     
 Ductal 116 (93 %) 371 (76 %) 121 (71 %) <0.001
 Lobular 9 (7 %) 95 (24 %) 48 (29 %)  
PAM50 subtype     
 Luminal-A 44 (35 %) 200 (41 %) 70 (41 %) 0.16
 Luminal-B 41 (33 %) 140 (29 %) 64 (38 %)  
 HER2 15 (12 %) 57 (12 %) 12 (7 %)  
 Basal 25 (20 %) 89 (18 %) 23 (14 %)