Please assess the completion status of the following clinical trial:

Trial Title: Low Dose Versus Usual Dose Dexamethasone for Symptom Control in Children Undergoing Cranial or Craniospinal Radiation

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: SUPPORTIVE_CARE
- Time Perspective: None
- Masking: QUADRUPLE
- Phase: PHASE3
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria for Enrolment:~* Children between 2-18 years of age.~* Children who underwent resection of a brain tumour with ≤ 1.5 cm2 residual tumour after surgical resection.~* Children regardless of extent of leptomeningeal or spinal metastasis (M1-3) are eligible.~* Children who undergo focal or whole brain (± spinal) radiation as part of their brain tumour treatment.~* Children treated at one of the 16 tertiary care centers in Canada (CPBTC).~* Patients on any anticonvulsive treatment are eligible.~* Patients on concomitant chemotherapy while undergoing radiation are eligible.~* Patients must be ≥ 24 hours steroid-free prior to starting radiation.~* Parents/legal guardians have to have signed and dated an informed consent to allow study enrolment of their child. (As per institutional guidelines, patients over a certain age may have signed their own informed consent form.)~* Patients \> 8 years of age should assent to study participation.~* Patients less than 10 years of age should have a Lansky Score of \>/= 50.~* Patients 10 years of age or older should have a Karnofsky Score of \>/= 50. If ECOG performance scale is used, patient should have a score of 0, 1 or 2.~Exclusion Criteria for Enrolment:~* Children with residual brain tumour lesion \> 1.5 cm2 after surgical resection.~* Children on steroids (dexamethasone) that will not be stopped ≥ 24 hours prior to start of radiation therapy.~Inclusion Criteria for Randomization to a Dexamethasone treatment group:~* Patients must have been enrolled on the Dexamethasone study prior to the start of radiation therapy.~* Children who develop either symptoms of vomiting (defined as either retching or vomiting ≥ once per day) or headache (≥ 2 points increase in severity of the most intense headache/day) while undergoing irradiation.~* Patients who are currently undergoing focal or whole brain (± spinal) radiation.~Exclusion Criteria for Randomization to a Dexamethasone treatment group:~* Patients who were not enrolled on Dexamethasone study prior to start of radiation therapy.

- Gender: ALL
- Minimum Age: 2 Years
- Maximum Age: 18 Years
- Healthy Volunteers: f

Study Arms:
- Standard Arm (Type: ACTIVE_COMPARATOR): Subjects scheduled to undergo radiation therapy are enrolled before the therapy is started. Once radiation therapy begins they will complete a daily diary about any headaches or nausea/vomiting they experience.~If they experience increased headache or vomiting they will be randomized to receive either a high or a low dose of dexamethasone, to control these symptoms.
- Control Arm (Type: ACTIVE_COMPARATOR): Subjects scheduled to undergo radiation therapy are enrolled before the therapy is started. Once radiation therapy begins they will complete a daily diary about any headaches or nausea/vomiting they experience.~If they experience increased headache or vomiting they will be randomized to receive either a high or a low dose of dexamethasone, to control these symptoms.

Based on this trial design, predict the completion outcome and termination type (if applicable).