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Table 1 Comparison of patient and tumor characteristics between palpation-guided and US-guided lumpectomy groups

From: Intraoperative ultrasound reduces the need for re-excision in breast-conserving surgery

Characteristic Palpation-guided lumpectomy US-guided lumpectomy p value
Age, mean (SD), y 51.1 (12.8) 53.4 (13.3) 0.25
Body mass index, mean (SD) 25.2 (4.5) 25.1 (3.5) 0.8
Menopausal status    
 Premenopausal 37 (46 %) 30 (36 %)  
 Postmenopausal 43 (54 %) 54 (64 %) 0.2
Tumor location    
 Outer 59 (74 %) 56 (67 %)  
 Inner 21 (26 %) 28 (33 %) 0.39
Tumor size    
 1–10 mm 6 (7 %) 11 (13 %)  
 11–20 mm 31 (39 %) 29 (35 %)  
 >20 mm 43 (54 %) 44 (52 %) 0.26
Lymph node status    
 Negative 49 (61 %) 54 (64 %)  
 Positive 31 (39 %) 30 (36 %) 0.74
Grade    
 1 12 (15 %) 10 (12 %)  
 2 36 (45 %) 44 (52 %)  
 3 32 (40 %) 30 (36 %) 0.62
EICa    
 Yes 26 (33 %) 22 (26 %)  
 No 54 (67 %) 62 (74 %) 0.39
Lymphovascular invasion    
 Yes 45 (56 %) 50 (60 %)  
 No 35 (44 %) 34 (40 %) 0.75
Multifocality    
 Yes 17 (21 %) 11 (13 %)  
 No 63 (79 %) 73 (87 %) 0.21
ER    
 Positive 64 (80 %) 73 (87 %)  
 Negative 16 (20 %) 11 (13 %) 0.29
PR    
 Positive 54 (67 %) 65 (77 %)  
 Negative 26 (33 %) 19 (23 %) 0.17
HER2-neu status    
 Amplified 15 (19 %) 15 (18 %)  
 Nonamplified 65 (81 %) 69 (82 %) 0.88
  1. EIC extensive intraductal component