Web Table 3. Breast Cancers According to the Mean Radiation Dose to the Breast in a Cohort of 1,814 Patients Treated for a First Cancer During Childhood
| Types of First Cancer |
Radiation Dose to Any Breast (Gy)
|
| No Radiation or < 1 |
 1 |
|
| Neuroblastoma or Hodgkin’s disease |
|
|
| Average dose to breast, Gy |
0.3 |
9.3 |
| No. with breast cancer |
1 |
6 |
| No. of breasts |
405 |
393 |
SIR |
10.0 |
80.6 |
| 90% CI |
4.3 to 19.4 |
32.0 to 163.4 |
| Others |
|
|
| Average dose to breast, Gy |
0.3 |
10.2 |
| No. with breast cancer |
7 |
2 |
| No. of breasts |
2,018 |
812 |
| SIR* |
20.7 |
11.3 |
| 90% CI |
1.2 to 91.3 |
1.7 to 34.8 |
|
Abbreviation: SIR, standardized incidence ratio.
* Compared with the general population at a same attained age.
|
