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Table 1 Patient's data and correlation between levels of mtDNA in peripheral blood of patients with breast cancer and clinical-pathological parameters

From: Decreased mitochondrial DNA content in blood samples of patients with stage I breast cancer

Variable Number mtDNA content
Median (Range)
P value
Age (years)    
   <50 30 525.96 (0.47 - 35241.80) *0.564
   ≥50 30 660.59 (0.39 - 27175.14)  
Menopausal status    
   pre 37 1365.30 (0.47 - 35241.80) *0.024
   post 23 262.29 (0.39 - 5166.60)  
Lymph-node status    
   negative 29 668.60 (4.23 - 27175.14) *0.673
   positive 31 436.55 (0.39 - 35241.80)  
Stage    
   I 20 196.94 (0.47 - 6841.04) **0.023
   II 20 1656.18 (10.89 - 35241.80)  
   III-IV 20 572.71 (0.39 - 4956.14)  
ER    
   positive 29 657.11 (0.39 - 35241.80) *0.877
   negative 31 376.11 (0.47 - 27175.14)  
PR    
   positive 36 654.85 (4.23 - 27175.14) *0.763
   negative 24 669.09 (0.39 - 35241.80)  
Her2/neu protein    
   positive 32 242.96 (0.39 - 35241.80) *0.335
   negative 28 824.78 (10.89 - 27175.14)  
  1. *P values are obtained by using the Mann-Whitney U test. ** P values are obtained by using one-way ANOVA on the rank followed by the Tukey test.