Table 2.
The list of important factors taken into consideration in making the decision to deliver boost irradiation, and the percentage of hospitals using this approach
| Elements | Percentage of hospitals (%) | |
|---|---|---|
| An important factor | A dominant factor* | |
| Age | 38 | 19 |
| Surgical margin condition | 97 | 94 |
| Nodal metastasis | 5 | 2 |
| Lymphovascular invasion | 8 | 0.3 |
| Subtypes of breast cancer | 6 | 2 |
| Others | 7 | 6 |
*A dominant factor is defined as a factor having a strong impact on the decision to apply BI, i.e. the use of BI could be determined solely by the dominant factor. BI = boost irradiation.