Trial Outcomes & Findings for IXAZOMIB Plus Lenalidomide and Dexamethasone Versus Placebo Plus Lenalidomide and Dexamethasone in Adult Patients With Newly Diagnosed Multiple Myeloma (NCT NCT01850524)

Participants took part in the study at 238 investigative sites in multiple countries from 29 April 2013 to 24 June 2022.

Participants with newly diagnosed multiple myeloma were enrolled in 1:1 ratio to receive ixazomib or placebo in addition to the background therapy of Lenalidomide and Dexamethasone (LenDex) in this study.

Number analyzed indicates number of participants available for analysis at baseline.

PFS was defined as the time from the date of randomization to the date of first documentation of progressive disease (PD) or death due to any cause according to International Myeloma Working Group (IMWG) criteria whichever occurs first. PD required one of the following: Increase of \>=25% from nadir in: Serum M-component and/or (the absolute increase must be \>=0.5 g/dL); Urine M-component and/or (the absolute increase must be \>=200 mg/24 hours); in participants without measurable serum and urine M-protein levels: the difference between involved and uninvolved free light chain (FLC) levels (absolute increase must be \> 10 mg/dL); Bone marrow plasma cell percentage: the absolute % must be \>10%; development of new bone lesions or soft tissue plasmacytomas or definite increase in the size of existing bone lesions or soft tissue plasmacytomas; hypercalcemia (corrected serum calcium \> 11.5 mg/dL or 2.85 mmol/L).

OS was defined as the time from the date of randomization to the date of death. Participants without documented death at the time of analysis are censored at the date last known to be alive.

CR rate was defined as the percentage of participants who achieve CR assessed by an IRC relative to the intent-to-treat (ITT) population during the treatment period. Percentage of participants with CR, as assessed by IMWG disease assessment criteria were reported. CR was defined as negative immunofixation of serum and urine along with the disappearance of any soft tissue plasmacytomas and \<5 % plasma cells (PC's) in bone marrow.

Pain response rate was defined as percentage of participants with pain response. Pain response was defined as the occurrence of at least a 30% reduction from baseline in BPI-SF worst pain score over the last 24 hours without an increase in analgesic use for 2 consecutive measurements \> 28 days apart, were reported. Brief Pain Inventory - Short Form (m-BPI-SF) is a participant rated 11-point Likert rating scale ranged from 0 (no pain) to 10 (worst pain imaginable). Percentages are rounded off to the nearest single decimal.

ORR was defined as the percentage of participants who achieved CR + partial response (PR) + very good partial response (VGPR) (including sCR) or better relative to the ITT population during treatment period. CR was defined as negative immunofixation of serum and urine along with the disappearance of any soft tissue plasmacytomas and \<5 % PC's in bone marrow. PR was defined as ≥50% reduction of serum M-protein and reduction in 24-hour urinary M-protein by ≥90% along with ≥50% reduction in the size of soft tissue plasmacytomas. VGPR was defined as ≥90% in serum M-component plus urine M-component \<100 mg/24. sCR is defined as stringent complete response. Percentages are rounded off to nearest whole numbers.

Time to response was defined as the time from the date of randomization to the first documentation of PR or better, as measured by IMWG criteria.

Duration of response was measured as the time from the date of first documentation of PR or better to the date of first documented progression (PD) for responders, as measured by IMWG criteria.

Time to progression was defined as the time from randomization to the date of first documented disease progression.

PFS2 was defined as the time from the date of randomization to the date of documentation of disease progression on the subsequent line of anticancer therapy, as assessed by the investigator in accordance with IMWG criteria, or death due to any cause, whichever occurs first.

Eastern Cooperative Oncology Group (ECOG) scale score ranged from 0 to 5, where 0 indicated normal activity and 5 indicated death. The data is reported for those categories where at least 1 participant had worst post-baseline value for each ECOG score.

An AE was any untoward medical occurrence in a participant administered a medicinal investigational drug. The untoward medical occurrence does not necessarily have to have a causal relationship with treatment. An SAE is any untoward medical occurrence that results in death; is life-threatening; requires inpatient hospitalization or prolongation of present hospitalization; results in persistent or significant disability/incapacity; is a congenital anomaly/birth defect or is a medically important event that may not be immediately life-threatening or result in death or hospitalization, but may jeopardize the participant or may require intervention to prevent one of other outcomes listed in definition above, or involves suspected transmission via a medicinal product of an infectious agent.

The laboratory values assessment included serum chemistry and hematology. The Serum chemistry assessment included blood urea nitrogen (BUN), creatinine, bilirubin (total), urate, lactate dehydrogenase, phosphate, albumin, alkaline phosphatase (ALP), aspartate aminotransferase (AST), alanine aminotransferase (ALT), glucose, sodium, potassium, calcium, chloride, carbon dioxide (CO2), magnesium, thyroid stimulating hormone (TSH). Hematology assessment included hemoglobin, hematocrit, platelet (count), leukocytes with differential neutrophils (ANC). Participants with abnormal serum chemistry laboratory values reported as TEAEs are reported. TEAEs were defined as events that occurred after administration of the first dose of any agent in the study drug regimen and through 30 days after the last dose of any agent in the study drug regimen.

EORTC-QLQ-C30 scale was used to assess HRQOL in cancer participants and contains 30 items. Subscale with individual items include physical functioning items 1-5, role functioning items 6-7, emotional functioning items 21-24, cognitive functioning items 20, 25, social functioning items 26-27, quality of life items 29-30, fatigue items 10, 12, 18, nausea and vomiting items 14-15, pain items 9, 19, dyspnoea item 8, insomnia item 11, appetite loss item 13, constipation item 16, diarrhoea item 17, financial difficulties item 28. Raw scores were converted into scale scores ranging from 0 to 100. For the functional scales and the global health status scale, higher scores represent better HRQOL; whereas for the symptom scales lower scores represent better HRQOL. Positive change in functional and global health status scale indicated improvement; negative change for the symptom scales indicates improvement.

EORTC QLQ-MY20 was a validated questionnaire to assess the overall quality of life in participants with multiple myeloma. The scale has 20 questions. Subscale and individual items include future perspective items 18-20, body image item 17, disease symptoms items 1-6, side effects of treatment items 7-16. Raw scores are averaged, and transformed to 0-100 scale, where higher score is better quality of life. Positive change indicates improvement.

OS was defined as the time from the date of randomization to the date of death, as assessed in high-risk population carrying del(17p), t(4;14), or t(14;16) mutations. High risk category includes t(4;14), t(14;16), or del(17) abnormalities.

PFS was defined as the time from the date of randomization to the date of first documentation of progressive disease based on central laboratory results and IMWG criteria as evaluated by an independent review committee (IRC) or death due to any cause, whichever occurs first, as assessed in high-risk population carrying del(17p), t(4;14), or t(14;16) mutations.

The absence of minimal residual disease (MRD negativity) was tested in all participants who achieve a CR and maintained it until Cycle 18, using bone marrow aspirates.

Time to pain progression was assessed as the time from randomization to the date of initial progression classification. Pain progression was defined as the occurrence of 1 of the following and confirmed by 2 consecutive evaluations (To qualify as progression, the participant must have a BPI-SF worst pain score \> 4 during pain progression): 1) a ≥ 2 point and 30% increase from Baseline in BPI-SF worst pain score without an increase in analgesic use, or 2) a 25% or more increase in analgesic use from Baseline without a decrease in BPI-SF worst pain score from Baseline. Brief Pain Inventory - Short Form (m-BPI-SF) is a participant rated 11-point Likert rating scale ranged from 0 (no pain) to 10 (worst pain imaginable).

SRE is defined as new fractures \[including vertebral compression fractures\], irradiation of or surgery on bone, or spinal cord compression.