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Table 1 Characteristics of the patients

From: Preliminary study of contrast-enhanced ultrasound in combination with blue dye vs. indocyanine green fluorescence, in combination with blue dye for sentinel lymph node biopsy in breast cancer

Characteristics CEUS + blue dye (n = 127) ICG + blue dye (n = 316) P
Age, years    0.891
 Mean ± SD 45.0 ± 14.5 46.9 ± 15.0  
Menopausal status, n (%)    0.987
 Premenopausal 72 (56.7) 180 (57.0)  
 Postmenopausal 47 (37.0) 115 (36.4)  
 Unknown 8 (6.3) 21 (6.6)  
Tumor stage, n (%)    0.287
 T1 80 (63.0) 217 (68.7)  
 T2 40 (31.5) 90 (28.5)  
 T3 7 (5.5) 9 (2.8)  
Tumor grade, n (%)    0.466
 G1 20 (15.7) 54 (17.1)  
 G2 64 (50.4) 139 (44.0)  
 G3 43 (33.9) 123 (38.9)  
Tumor stage, n (%)    0.841
 I 74 (58.3) 193 (61.1)  
 II 50 (39.4) 117 (37.0)  
 III 3 (2.3) 6 (1.9)  
LVI, n (%)    0.745
 Yes 7 (5.5) 20 (6.3)  
 No 120 (94.5) 296 (93.7)  
ER status, n (%)    0.682
 Positive 97 (76.4) 230 (72.8)  
 Negative 23 (18.1) 69 (21.8)  
 unknown 7 (5.5) 17 (5.4)  
PR status, n (%)    0.768
 Positive 91 (71.7) 219 (69.4)  
 Negative 29 (22.8) 82 (25.9)  
 unknown 7 (5.5) 15 (4.7)  
HER2 status, n (%)    0.879
 Positive 24 (18.9) 56 (17.7)  
 Negative 95 (74.8) 243 (76.9)  
 Equivocal /unknown 8 (6.3) 17 (5.4)  
Breast surgery, n (%)    0.518
 Lumpectomy 50 (39.4) 135 (42.7)  
 Mastectomy 77 (60.6) 181 (57.3)  
  1. CEUS Contrast-enhanced ultrasound, ICG Indocyanine green, SD Standard deviation, LVI Lymphovascular invasion, ER Estrogen receptor, PR Progesterone receptor, HER2 Human epidermal growth factor receptor 2