A Study of Real-World Use of Ixazomib Citrate in People With Multiple Myeloma (MM)

PFS is defined as the estimated length of time since the start of treatment with ixazomib to disease progression (PD), study end or death, whichever occurs first. PFS will be assessed by International Myeloma Working Group (IMWG) Criteria, PD: increase of greater than or equal to (>=) 25 percent (%) from lowest response value in any one or more of the following: serum M-component increase >=0.5 gram per deciliter (g/dL) or urine M-component increase >=200 milligram (mg)/24-hour; difference between involved and uninvolved free light chains (FLC) levels increase must be greater than (>) 10 mg/dL; bone marrow plasma cell >=10%; definite development of new bone lesions or soft tissue plasmacytomas or definite increase in the size of existing bone lesions or soft tissue plasmacytomas; development of hypercalcemia that can be attributed solely to plasma cell proliferative disorder. PFS will be analyzed using Kaplan-Meier method.

ORR is defined as the percentage of participants with stringent complete response (sCR), complete response (CR), very good partial response (VGPR), or partial response (PR) based on the review of the myeloma response data assessed by IMWG criteria. sCR: CR as defined below plus normal FLC ratio and absence of clonal cells in bone marrow by immunohistochemistry or immunofluorescence; CR: negative immunofixation on the serum and urine and disappearance of any soft tissue plasmacytomas and less than (<) 5% plasma cells in bone marrow; VGPR: Serum and urine M-protein detectable by immunofixation but not on electrophoresis or >=90% reduction in serum M-protein plus urine M-protein level <100 mg/24 hour; PR: >=50% reduction of serum M-protein and >=90% reduction in urine M-protein or <200 mg/24 hour, or >=50% decrease in uninvolved FLC or >=50% reduction in plasma cells. At baseline, a >=50% decrease in size of soft tissue plasmacytomas is required.