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. 2022 Apr 29;29(8):4764–4772. doi: 10.1245/s10434-022-11829-1

Table 1.

Patient and tumor characteristics (n = 2059)

Primary breast cancer
(n = 2059)
Median (range)
Age (years) 65 (26–95)
Body mass index (kg/m2) 25 (17–41.1)
n (%)
Race/ethnicity
 White 2025 (98%)
 Afro-American 20 (1%)
 Asian 14 (1%)
Histopathologic N stage
 N0 1513 (74%)
 N1 393 (19%)
 N2 107 (5%)
 N3 46 (2%)
Preoperative axillary sonographic status
 Negative 1623 (79%)
 Positive 436 (21%)
Histology
 No special type (NST) 1550 (75%)
 Lobular 392 (19%)
 Other 117 (6%)
Grade
 G1 215 (10%)
 G2 1387 (68%)
 G3 457 (22%)
Subtype
 Luminal A 919 (45%)
 Luminal B 735 (35%)
 HER2 positive 189 (9%)
 Triple negative 216 (11 %)
Surgery
 Breast-conserving therapy 1433 (70%)
 Mastectomy 626 (30%)
Axillary procedure
 Sentinel node biopsy 1513 (74%)
 Axillary dissection 436 (21%)
 Both 110 (5%)
Median (range)
Median number of lymph nodes removed
 Sentinel node biopsy 2 (1–11)
 Axillary dissection 10 (1–40)
 Total 1 (1–40)
Median number of metastatic lymph nodes removed
 Sentinel node biopsy 0 (0–7)
 Axillary dissection 0 (0–35)
 Total 0 (0–35)