Are the American Society for Radiation Oncology Guidelines Accurate Predictors of Recurrence in Early Stage Breast Cancer Patients Treated with Balloon-Based Brachytherapy?
Table 3
Factors associated with ipsilateral breast tumor recurrence.
Variable
Hazard ratio (95% CI)
Age: ≥50 versus <50
0.63 (0.08–5.19)
0.67
Age: ≥60 versus <60
0.55 (0.13–2.32)
0.42
Tumor size: >2 cm versus ≤2 cma
2.20 (0.25–19.75)
0.48
Tumor type: ILC versus other
1.89 (0.23–15.41)
0.55
Tumor type: DCIS versus invasive cancer
1.61 (0.38–6.75)
0.52
ER status: negative versus positivea
5.87 (0.97–35.34)
0.053
Margins: negative versus close/positive
7.63 (1.45–40.0)
0.016
Multifocality: yes versus no
2.36 (0.28–19.99)
0.43
LVI: present versus none
—
0.60
Nodal status: positive versus negative
—
1.0
CI: confidence interval, ILC: invasive lobular carcinoma, DCIS: ductal carcinoma in situ, ER: estrogen receptor, and LVI: lymphovascular invasion. Excludes DCIS. Cox proportional hazards model could not be performed due to lack of events.