Table 1.
Clinical and treatment characteristics
| Variable | N |
|---|---|
| Age | |
| Diagnosis | 7.77 years (1.29–17.52) |
| At start of radiation therapy | 8.98 years (3.20–17.63) |
| Presentation | |
| Headache | 62 |
| Visual disturbance | 17 |
| Growth delay | 9 |
| Emesis | 4 |
| Loss of consciousness | 4 |
| Head injury | 3 |
| Precocious puberty | 2 |
| Gender | |
| Female | 46 |
| Male | 55 |
| Race | |
| Asian/Pacific islander | 1 |
| Black | 22 |
| Hispanic | 2 |
| White | 76 |
| Extraventricular drain | |
| Yes | 23 |
| No | 78 |
| CSF shunt | |
| Yes | 27 |
| No | 74 |
| CTV margin | |
| ≤0.5 cm | 76 |
| 1.0 cm | 25 |
| PTV margin | |
| 0.3 cm | 58 |
| 0.5 cm | 43 |
| Dose | |
| 54Gy | 94 |
| 55.8Gy | 7 |
| Target volumes (mL) | |
| GTV | 12.28(0.42–64.66) |
| CTV | 36.84 (5.20–176.7) |
| PTV | 65.75 (17.31–257.5) |
| Target volume dose coverage (cGy) | |
| D95GTV | 5441 (5298–5740) |
| D95CTV | 5415 (5031–5701) |
| D95PTV | 5364 (5347–5691) |
| Planning and delivery method | |
| Conformal radiation therapy | 84 |
| Intensity-modulated radiation therapy | 17 |
Abbreviations: CSF, cerebrospinal fluid; CTV, clinical target volume; PTV, planning target volume; GTV, gross total volume.