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Table 1 Patient, tumor, and treatment characteristics of 322 patients

From: Comparison of ipsilateral breast tumor recurrence after breast-conserving surgery between ductal carcinoma in situ and invasive breast cancer

Characteristics N (%)
Age, years  
 Median, range 51 (23~79)
T stage  
 Tis 50 (15.5 %)
 T1 (≤2 cm) 189 (58.7 %)
 T2 (>2 and ≤5 cm) 83 (25.8 %)
N stage  
 N0 239 (78.1 %)
 N1 55 (18.0 %)
 N2 12 (3.9 %)
AJCC stage  
 0 50 (15.5 %)
 I–IIA 233 (72.4 %)
 IIB–IIIA 39 (12.1 %)
Histology  
 Ductal in situ 50 (15.5 %)
 Invasive ductal 244 (75.8 %)
 Invasive lobular 7 (2.2 %)
 Others 21 (6.5 %)
Hormonal receptor  
 Positive 238 (82.1 %)
 Negative 49 (16.9 %)
HER2  
 Negative 235 (73.0 %)
 Positive 40 (12.4 %)
Ki-67  
 Negative 139 (43.2 %)
 Positive 173 (53.7 %)
Nuclear grade  
 Low 38 (11.8 %)
 Intermediate 170 (52.8 %)
 High 114 (35.4 %)
Resection margin status  
 Negative 310 (96.3 %)
 Close 5 (1.6 %)
 Positive 7 (2.2 %)
Hormonal therapy  
 Done 236 (73.3 %)
 Not done 86 (26.7 %)
Chemotherapy  
 Done 198 (61.5 %)
 Not done 124 (38.5 %)
Radiotherapy  
 Done 310 (96.3 %)
 Not done 12 (3.7 %)