{"classes":[{"categories":[{"measurements":[{"groupId":"OG000","value":"54.86"},{"groupId":"OG001","value":"60.28"},{"groupId":"OG002","value":"56.82"}]}]}],"denoms":[{"counts":[{"groupId":"OG000","value":"175"},{"groupId":"OG001","value":"141"},{"groupId":"OG002","value":"88"}],"units":"Participants"}],"description":"Percentage of patients with presence of one or more IDRFs will be calculated. IDRFs describe anatomic features which may make surgical resection more difficult.","groups":[{"description":"2 courses of initial chemotherapy (6 wks) - carboplatin, cyclophosphamide, doxorubicin hydrochloride, etoposide, filgrastim. Partial response (PR) to chemo go to observation. No PR: 2-6 additional courses of chemo (beginning course 3 - cyclophosphamide, etoposide, filgrastim, carboplatin, doxorubicin hydrochloride). No PR after additional chemotherapy proceed to retrieval chemo: cyclophosphamide and topotecan hydrochloride on days 1-5. Treatment with retrieval chemotherapy repeats every 21 days for up to 6 courses. Some patients may also undergo surgery.","id":"OG000","title":"Group 2 (Chemotherapy, Surgery)"},{"description":"4 courses of initial chemo - carboplatin, cyclophosphamide, doxorubicin hydrochloride, filgrastim. Patients with a PR after chemo proceed to observation. No PR receive 2-4 additional courses of chemotherapy (beginning with course 5) - carboplatin, cyclophosphamide, doxorubicin hydrochloride, etoposide, filgrastim. No PR after additional chemo proceed to retrieval chemo - cyclophosphamide and topotecan hydrochloride. Some patients may also undergo surgery.","id":"OG001","title":"Group 3 (Chemotherapy, Surgery)"},{"description":"8 courses of initial chemo - carboplatin, cyclophosphamide, doxorubicin hydrochloride, etoposide, filgrastim. Patients \\< 12 months of age with stg 3, 4, or 4S (not including liver metastases) disease who achieve a very good PR (VGPR) to chemo proceed to observation. Patients 12-18 months of age with stg 3 or 4 who achieve VGPR proceed to isotretinoin therapy. No VGPR proceed to retrieval chemo - cyclophosphamide and topotecan hydrochloride. Some patients may also undergo surgery.","id":"OG002","title":"Group 4 (Chemotherapy, Surgery, Antineoplastic Therapy)"}],"paramType":"NUMBER","populationDescription":"All eligible and evaluable patients enrolled on ANBL0531","reportingStatus":"POSTED","timeFrame":"At baseline","title":"Image Defined Risk Factor (IDRF)","type":"SECONDARY","unitOfMeasure":"percentage of patients"}