{"classes":[{"categories":[{"measurements":[{"groupId":"OG000","lowerLimit":"19.8","upperLimit":"30.2","value":"25"}]}]}],"denoms":[{"counts":[{"groupId":"OG000","value":"264"}],"units":"Participants"}],"description":"Incidence of ON among patients who have submitted MRI screening data will be estimated.","dispersionType":"95% Confidence Interval","groups":[{"description":"HR and VHR B-ALL patients, 10 years or older with submitted MRI screening data","id":"OG000","title":"HR and VHR B-ALL Patients (10 Years or Older)"}],"paramType":"NUMBER","populationDescription":"HR and VHR patients that are 10 years or older with submitted MRI screening data. It was pre-specified in Study Protocol to collect and report data as a single Arm/Group for patients who met eligibility criteria for this correlative aim. Inevaluable and ineligible patients were excluded from analysis.","reportingStatus":"POSTED","timeFrame":"Up to 10 years","title":"Incidence of Osteonecrosis (ON) Defined by Magnetic Resonance (MR) Imaging in Children, Adolescents, and Young Adults 10 Years of Age and Greater","type":"SECONDARY","unitOfMeasure":"Percentage of patients"}