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Table 1 Patient characteristics

From: Role of patient and tumor characteristics in sentinel lymph node metastasis in patients with luminal early breast cancer: an observational study

Patients—N (%) 345 (100.0)
Age at surgery, years  
 Mean (SD) 61.0 (11.3)
Min–max 29.9–87.7
Menopausal status—N (%)  
 Pre 73 (21.2)
 Post 272 (78.8)
Type of surgery—N (%)  
 Mastectomy 44 (12.8)
 Quadrantectomy 292 (84.6)
 Nodulectomy 9 (2.6)
Number of excised sentinel nodes per patient  
 Mean (SD) 1.5 (0.9)
 Min–max 1–7
Number of sentinel nodes excised, distribution—N (%)  
 1 227 (65.8)
 2 77 (22.3)
 3 28 (8.1)
 4 8 (2.3)
 ≥5 5 (1.4)
Number of positive sentinel nodes per patient  
 Mean (SD) 1.2 (0.5)
 Min–max 1–4
Sentinel node status  
 Patients with negative sentinel nodes—N (%) 261 (75.7)
  Isolated tumoral cells 33 (12.6)
  No Isolated tumoral cells 228 (87.4)
 Patients with positive sentinel nodes—N (%) 84 (24.3)
  Micrometastasis 31 (36.9)
  Macrometastasis 53 (63.1)
Axillary dissection—N (%)a 65 (18.8)
 Number of resected nodes per patient  
  Mean (SD) 15.4 (5.5)
  Min–max 1–31
 Number of positive nodes per patient  
  Mean (SD) 1.8 (3.5)
  Min–max 0–18
  1. Min–max minimum and maximum values
  2. a65 patients underwent axillary dissection