A Study Comparing Once-weekly vs Twice-weekly Carfilzomib in Combination With Lenalidomide and Dexamethasone in Subjects With Relapsed or Refractory Multiple Myeloma

ORR was defined as the percentage of participants with a best overall response of stringent complete response (sCR), complete response (CR), very good partial response (VGPR), or partial response (PR) per IMWG-URC. CR: negative immunofixation on serum and urine, soft tissue plasmacytomas disappearance, < 5% plasma cells in bone marrow (BM). sCR: CR and normal serum free light chain ratio and no clonal cells in BM by immunohistochemistry. VGPR: Serum and urine M-protein detectable by immunofixation or ≥ 90% reduction in serum M-protein (urine M-protein level < 100 mg/24-hours). PR: ≥ 50% reduction of serum M-protein and reduction in 24-hours urinary M-protein by ≥ 90% or to < 200 mg/24-hours. The ORR 95% confidence intervals (CIs) were estimated using the Clopper-Pearson method.

PFS rate was defined as the percentage of participants without disease progression or death due to any cause at 12 months. The PFS rate at 12 months was estimated using the Kaplan-Meier method by Klein and Moeschberger (1997). 95% CIs were estimated using the method by Kalbfleisch and Prentice (1980). PFS data was censored for participants who met any one of the following: 1. no baseline/no post-baseline disease assessments; 2. starting new anti-myeloma therapy before documentation of progressive disease (PD) or death; 3. PD or death immediately after more than 1 consecutively missed disease assessment visit (PD or death immediately after > 63 days without disease assessment visit); 4. alive without documentation of PD; 5. lost to follow-up or withdrawn consent.

Patient-reported convenience was measured by the Patient-reported Convenience with Carfilzomib-dosing Schedule Question. The items in the questionnaire were categorized as 'Convenient', which included responses of 'Very Convenient' and 'Convenient', and 'Inconvenient' which included responses of 'Inconvenient' and 'Very Inconvenient'. The 95% CIs were estimated using the Clopper-Pearson method.

An adverse event (AE) was any untoward medical occurrence in a clinical study participant irrespective of a causal relationship with the study treatment. TEAEs were AEs starting on or after the first dose of any study drug, and up to 30 days of the last dose of any study drug, excluding AEs reported after End of Study date.

TTR was defined as the time from randomization to the earliest date when confirmed sCR, CR, VGPR, or PR per IMWG-URC was first achieved.

For participants who achieved a PR or better, i.e., sCR, CR, VGPR, or PR per IMWG-URC, the DOR was defined as the time from the earliest date when a PR or better was first achieved, and subsequently confirmed, to the earliest date of confirmed PD or death due to any cause. Median DOR was estimated using the Kaplan-Meier method. 95% CIs were estimated using the method by Klein and Moeschberger (1997) with log-log transformation. For those alive and who had not experienced PD by analysis time, DOR was censored for participants who met any one of the following: 1. no baseline/no post-baseline disease assessments; 2. starting new anti-myeloma therapy before documentation of PD or death; 3. PD or death immediately after more than 1 consecutively missed disease assessment visit (PD or death immediately after > 63 days without disease assessment visit); 4. alive without documentation of PD; 5. lost to follow-up or withdrawn consent.

TTP was defined as the duration from randomization for the first documented disease progression per IMWG-UCR. Median TTP was estimated using the Kaplan-Meier method. 95% CIs were estimated using the method by Klein and Moeschberger (1997) with log-log transformation. TTP was censored for participants who had no confirmed PD at the last non non-evaluable (non-NE), post-baseline disease assessment or the earlier of the following, where applicable: 1. the last non-NE, post-baseline disease assessment prior to start of a new anti-myeloma treatment, or 2. the last non-NE, post-baseline assessment followed > 63 days later by disease progression; otherwise, at randomization.

OS was defined as the time from randomization to the date of death due to any cause. Median OS was estimated using the Kaplan-Meier method. 95% CIs were estimated using the method by Klein and Moeschberger (1997) with log-log transformation. Participants still alive or lost to follow-up or withdrawn consent from study by the analysis time were censored at the date on which the participant was last known to be alive.

MRD[-]CR was defined as achievement of CR or better by IRC per IMWG-URC and achievement of MRD negativity as assessed by next generation sequencing method at a 10^-5 threshold over the duration of the study. The 95% CIs for percentages were estimated using the Clopper-Pearson method.

The percentage of participants with achievement of MRD[-] at 12 months (± 4 weeks) from randomization, as assessed by next generation sequencing method at a 10^-5 threshold. MRD negativity results from BM samples obtained at 8 to 13 months from randomization and prior to new anti-myeloma therapy or disease progression were considered in the calculation. The 95% CIs for percentages were estimated using the Clopper-Pearson method.

The QLQ-C30 physical function is one of the functional domains of the EORTC QLQ-C30 self-reported instrument and the physical functioning score score ranges from 0-100 points, with 100 points indicating the best possible functioning. A positive change from baseline indicated an improvement in functioning.

The QLQ-C30 role function is one of the functional domains of the EORTC QLQ-C30 self-reported instrument and the role functioning score ranges from 0-100 points, with 100 points indicating the best possible functioning. A positive change from baseline indicated an improvement in functioning.

The CTSQ measures treatment satisfaction in individuals with cancer and includes a domain for satisfaction with therapy. The satisfaction with therapy scores ranges from 0 to 100 points, with 100 points indicating greatest satisfaction.

Analysis was based on ANCOVA model. The dependent variable of the models were the scale scores measured at each visit. The model included effects of intercept, scale score measured at cycle 2 day 1 visit, treatment arm, and randomization stratification factors.