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Table 1 Demographics of the breast cancer population

From: Analysis of Epstein-Barr virus reservoirs in paired blood and breast cancer primary biopsy specimens by real time PCR

Variable Number
Age, years (N = 23)  
   <45 3
   45–55 8
   >55 12
Menopausal status (N = 23)  
   Pre-/peri-menopausal 16
   Post-menopausal 7
Tumor size (cm) (N = 23)  
   <2 12
   ≥2 11
Nodal status (N = 22)  
   Negative 11
   Positive 11 (2 micrometasis)
   Unknown 1
Tumor grade (SBR) (N = 20)  
   I 9
   II 9
   III 2
Histology (N = 20)  
   Ductal 16
   Lobular 1
   Other 3
ER status (N = 22)  
   Positive 6
   Negative 16
   Unknown 1
PR status (N = 22)  
   Positive 8
   Negative 14
   Unknown 1
HER-2 status (N = 21)  
Positive 20
Negative 1
Unknown 2
  1. N = the number of specimens available for evaluation. ER, estrogen receptor; PR, progesterone receptor; SBR, Scarff, Blum, and Richardson.