{"denoms":[{"counts":[{"groupId":"BG000","value":"269"},{"groupId":"BG001","value":"144"},{"groupId":"BG002","value":"413"}],"units":"Participants"}],"groups":[{"description":"Participants assigned to the average-risk arm had localized tumor without overt evidence of invasion beyond the posterior fossa (or supratentorial compartment for PNET's/ATRT). 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":"BG000","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":"BG001","title":"High-Risk Group"},{"description":"Total of all reporting groups","id":"BG002","title":"Total"}],"measures":[{"classes":[{"categories":[{"measurements":[{"groupId":"BG000","spread":"4.08","value":"9.15"},{"groupId":"BG001","spread":"3.93","value":"8.66"},{"groupId":"BG002","spread":"4.03","value":"8.98"}]}]}],"dispersionType":"STANDARD_DEVIATION","paramType":"MEAN","title":"Age, Continuous","unitOfMeasure":"Years"},{"classes":[{"categories":[{"measurements":[{"groupId":"BG000","lowerLimit":"3.06","upperLimit":"21.56","value":"8.42"},{"groupId":"BG001","lowerLimit":"3.13","upperLimit":"20.43","value":"7.87"},{"groupId":"BG002","lowerLimit":"3.06","upperLimit":"21.56","value":"8.33"}]}]}],"dispersionType":"FULL_RANGE","paramType":"MEDIAN","title":"Age, Continuous","unitOfMeasure":"years"},{"classes":[{"categories":[{"measurements":[{"groupId":"BG000","value":"105"},{"groupId":"BG001","value":"56"},{"groupId":"BG002","value":"161"}],"title":"Female"},{"measurements":[{"groupId":"BG000","value":"164"},{"groupId":"BG001","value":"88"},{"groupId":"BG002","value":"252"}],"title":"Male"}]}],"paramType":"COUNT_OF_PARTICIPANTS","title":"Sex: Female, Male","unitOfMeasure":"Participants"}],"populationDescription":"Participants had a diagnosis of medulloblastoma, supratentorial primitive neuroectodermal tumor (PNET), PNET variants (ependymoblastoma, pineoblastoma, CNS neuroblastoma), or atypical teratoid rhabdoid tumor (ATRT)."}