{"classes":[{"categories":[{"measurements":[{"groupId":"OG000","value":"3"},{"groupId":"OG001","value":"0"}]}]}],"denoms":[{"counts":[{"groupId":"OG000","value":"3"},{"groupId":"OG001","value":"3"}],"units":"Participants"}],"description":"The detection of anti-elotuzumab anti-drug antibodies (ADAs) in human serum was performed using a validated bridging electrochemiluminescence immunoassay (ECLA) on the Meso Scale Discovery (MSD) platform. Sample collection was performed prior to administration of elotuzumab at Day 1 of each cycle.","groups":[{"description":"Elotuzumab was administered IV at a dose of 10 mg/kg weekly (Days 1, 8, 15 and 22 of 4-week cycle) for the first 2 cycles and bi-weekly (every 2 weeks) (Day 1 and Day 15) thereafter until disease progression or unacceptable toxicity became apparent. Lenalidomide 25 mg was administered PO once daily for the first 3 weeks of each 4-week cycle. The dose of lenalidomide was administered at least 2-4 hours after completion of elotuzumab infusion. On weeks without elotuzumab administration, dexamethasone was administered PO as a single dose of 40 mg. On weeks of elotuzumab infusion, the weekly dose of dexamethasone was administered as a split dose of: 28 mg PO (between 3 to 24 hours prior to the start of the elotuzumab infusion) and 8 mg IV (At least 45 min prior to the start of the elotuzumab infusion).","id":"OG000","title":"Elotuzumab 10 mg/kg"},{"description":"Elotuzumab was administered IV at a dose of 20 mg/kg weekly (Days 1, 8, 15 and 22 of 4-week cycle) for the first 2 cycles and bi-weekly (every 2 weeks) (Day 1 and Day 15) thereafter until disease progression or unacceptable toxicity became apparent. Lenalidomide 25 mg was administered PO once daily for the first 3 weeks of each 4-week cycle. The dose of lenalidomide was administered at least 2-4 hours after completion of elotuzumab infusion. On weeks without elotuzumab administration, dexamethasone was administered PO as a single dose of 40 mg. On weeks of elotuzumab infusion, the weekly dose of dexamethasone was administered as a split dose of: 28 mg PO (between 3 to 24 hours prior to the start of the elotuzumab infusion) and 8 mg IV (At least 45 min prior to the start of the elotuzumab infusion).","id":"OG001","title":"Elotuzumab 20 mg/kg"}],"paramType":"NUMBER","populationDescription":"All participants who received at least one dose of study medication were summarized.","reportingStatus":"POSTED","timeFrame":"First dose (Day 1) to last dose plus 60 days (assessed up to January 2017, approximately 71 months)","title":"Number of Participants Positive for Anti-Elotuzumab Anti-drug Antibodies - Treated Participants","type":"SECONDARY","unitOfMeasure":"participants"}