{"classes":[{"categories":[{"measurements":[{"groupId":"OG000","lowerLimit":"5","upperLimit":"30","value":"14"},{"groupId":"OG001","lowerLimit":"3","upperLimit":"23","value":"9.5"}]}]}],"denoms":[{"counts":[{"groupId":"OG000","value":"50"},{"groupId":"OG001","value":"50"}],"units":"Participants"}],"description":"Bone marrow biopsy length is studied with mean, median, range, and standard deviation and compared by two-sample t-test.","dispersionType":"95% Confidence Interval","groups":[{"description":"Patients undergo bone marrow biopsy using the power drill. Patients complete questionnaires at baseline, 30 minutes after biopsy, and on days 1, 3, and 7.\n\nPower drill: Undergo bone marrow biopsy using power drill","id":"OG000","title":"Arm I (Biopsy Using Power Drill)"},{"description":"Patients undergo bone marrow biopsy using the traditional Jamshidi needle. Patients complete questionnaires at baseline, 30 minutes after biopsy, and on days 1, 3, and 7.\n\nJamshidi needle: Undergo bone marrow biopsy using Jamshidi needle","id":"OG001","title":"Arm II (Biopsy Using Jamshidi Needle)"}],"paramType":"MEAN","reportingStatus":"POSTED","timeFrame":"At the time of biopsy","title":"Bone Marrow Core Biopsy Length (in mm) and Artifacts Assessed by the Pathologist","type":"PRIMARY","unitOfMeasure":"Millimeters"}