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Table 2 Surgery time interval and tumor characteristics

From: Surgery time interval and molecular subtype may influence Ki67 change after core needle biopsy in breast cancer patients

Characteristic 1-2 days 3-4 days ≥5 days P value
Age     0.067
 <40 5 5 10  
 40-49 16 24 24  
 50-70 32 70 53  
 >70 2 14 21  
Menstrual status     0.084
 Peri/pre-menopause 24 30 35  
 Post-menopause 31 83 73  
Breast surgery type     0.960
 Mastectomy (+/−reconstruction) 47 98 94  
 Lumpectomy 8 15 14  
Pathological type     0.973
 Invasive ductal carcinoma 49 101 96  
 Invasive lobular carcinoma 3 5 4  
 Others 3 7 8  
Tumor size     0.110a
 Tx 2 2 1  
 ≤2 cm 30 45 43  
 2-5 cm 23 65 49  
 >5 cm 0 1 5  
Axillary lymph node     0.582
 Negative 28 67 60  
 Positive 27 46 48  
Histologic grading     0.821a
 I 0 3 3  
 II 30 51 53  
 III 15 41 34  
 NA 10 18 18  
Estrogen Receptor     0.732
 Negative 11 28 23  
 Positive 44 85 85  
Progesterone Receptor     0.357
 Negative 21 52 40  
 Positive 34 61 68  
Hormonal Receptor     0.822
 Negative 11 27 23  
 Positive 44 86 85  
HER2     0.797
 Negative 43 91 83  
 Positive 12 22 25  
Ki67 (%, mean)     0.222
 <20 20 55 54  
 ≥20 35 58 54  
Molecular subtype     0.738
 Luminal A 13 30 30  
 Luminal B-HER2- 26 43 40  
 Luminal B-HER2+ 5 13 15  
 Triple negative 4 18 13  
 HER2 positive 7 9 10  
  1. Abbreviation: NA not available
  2. aCalculated by Fisher’s exact test