Table 2.
Patterns of treatment failure
| Failure | C-QD (n) | SDR-QD (n) | BID (n) | P-value | |
|---|---|---|---|---|---|
| No failure | 37 | 42 | 39 | 0.63 | |
| Locoregional in-field | 6 | 5 | 7 | 0.85 | |
| Locoregional in-field + out-of-field | 5 | 3 | 5 | 0.83 | |
| Locoregional out-of-field | 7 | 5 | 8 | 0.81 | |
| Distant metastasis only | Bone | 7 | 10 | 11 | 0.12 |
| Brain | 14 | 15 | 14 | 0.94 | |
| Liver | 7 | 6 | 5 | 0.18 | |
| Others | 5 | 3 | 2 | 0.19 | |
| Locoregional + Distant | 12 | 11 | 9 | 0.26 |
C-QD, conventional intensity-modulated radiotherapy (IMRT) once daily IMRT; SDR-QD, simultaneous dose reduction once daily IMRT; BID, twice daily.