Table 4.
Mean dose, BED mean dose, D5, and BED D5 for whole breast irradiation and partial breast irradiation
| Variable | PBI Medial tumors | WBI | P‐value |
|---|---|---|---|
| Mean dose (Gy) | 1.1 (0.5, 2.0) | 1.6 (1.0, 2.4) | 0.16 |
| BED mean dose (Gy3) | 1.1 (0.6, 2.1) | 1.6 (1.0, 2.5) | 0.31 |
| D5 (Gy) | 4.4 (2.2, 7.5) | 4.8 (3.2, 8.4) | 0.84 |
| BED D5 (Gy3) | 5.1 (2.4, 9.5) | 5.2 (3.4, 9.3) | 1.00 |
| Lateral tumors | |||
| Mean dose (Gy) | 0.33(0.27,0.75) | 1.47(1.08,2.05) | 0.008 |
| BED mean dose (Gy3) | 0.34(0.27, 0.77) | 1.50(1.10,2.11) | 0.008 |
| D5 (Gy) | 1.1 (1.0, 2.7) | 4.1 (3.2, 5.1) | 0.008 |
| BED D5 (Gy3) | 1.1 (1.0, 3.0) | 4.4 (3.3, 5.4) | 0.008 |
The sample mean (median 25th percentile, median 75th percentile) is given. P‐values result from a Wilcoxon signed rank test comparing PBI vs WBI. BED is defined as Biologically Equivalent Dose. D5 is defined as dose to 5% of the total heart volume.