Table 4.
Significant p-values using Mann–Whitney U test (comparing parameters for organ at risk sparing as given in Table 3)
| Variables | Comparisons |
|||
|---|---|---|---|---|
| Conv vs FIF | Conv vs HT-IMRT | Conv vs TD-3DCRT | Conv vs TD-IMRT | |
| Total lung | ||||
| Mean | 0.280 | 0.190 | 0.007 | 0.001 |
| V40 | 0.853 | 0.000 | 0.684 | 0.105 |
| V30 | 1.000 | 0.000 | 0.631 | 0.218 |
| V10 | 0.631 | 0.579 | 0.089 | 0.035 |
| V5 | 0.029 | 0.684 | 0.000 | 0.000 |
| Heart | ||||
| Mean | 0.007 | 0.579 | 0.029 | 0.004 |
| V40 | 0.631 | 0.000 | 0.793 | 0.853 |
| V5 | 0.005 | 0.853 | 0.003 | 0.002 |
3DCRT, three-dimensional conformal radiotherapy; conv, conventional; FIF, field in field; HT, helical tomotherapy; IMRT, intensity-modulated radiotherapy; TD, TomoDirect™ (Accuray Inc., Sunnyvale, CA); Vx, volume of OAR receiving at least x Gy.
Significant p-values are shown in bold.