{"classes":[{"categories":[{"measurements":[{"groupId":"OG000","spread":"18.53","value":"83.98"},{"groupId":"OG001","spread":"19.73","value":"87.29"}]}]}],"denoms":[{"counts":[{"groupId":"OG000","value":"48"},{"groupId":"OG001","value":"21"}],"units":"Participants"}],"description":"Assessment of Processing Speed at enrollment. This score measure of Processing Speed based on Visual Matching and Decision Speed tests. Mean=100, SD=15, Average Range 85-115. Higher is better.","dispersionType":"Standard Error","groups":[{"description":"Average-Risk Participants assigned to the average-risk arm had localized tumor without overt evidence of invasion beyond the posterior fossa. Participants with T4 disease met the following criteria: gross total resection defined as residual tumor or imaging abnormality whose size was \\<1.5 cm\\^2 on postoperative CT or MR images, no evidence of CNS or extraneural metastasis, and brain stem invasion by the tumor in the absence of imaging evidence of residual tumor (tumor size \\<1.5 cm\\^2).","id":"OG000","title":"Average Risk Group"},{"description":"Participants assigned to the high- risk arm were determined to have the presence of metastatic disease within the neuraxis (i.e., evidence of subarachnoid dissemination), OR presence of residual disease (≥1.5 cm\\^2) at the primary site after surgery.","id":"OG001","title":"High Risk Group"}],"paramType":"MEAN","populationDescription":"Children with medulloblastoma who were age 3-21 years at diagnosis and were enrolled on SJMB03 at St Jude Children's Research Hospital. Patients were excluded if the cumulative RT plan (Craniospinal Irradiation (CSI) and boost) could not be retrieved; if the baseline preRT Magnetic Resonance Image (MRI) scan was of poor quality, preventing delineation of brain substructures; or if the patient had completed fewer than two specific neurocognitive evaluations for this objective.","reportingStatus":"POSTED","timeFrame":"At enrollment","title":"Processing Speed for Two Risk Group at Enrollment","type":"SECONDARY","unitOfMeasure":"score on a scale"}