Study to Determine Efficacy and Safety of Lenalidomide Plus Low-dose Dexamethasone Versus Melphalan, Prednisone, Thalidomide in Patients With Previously Untreated Multiple Myeloma

Overall survival was defined as the time between randomization and death. Participants, who died, regardless of the cause of death, were considered to have had an event. All participants who were lost to follow-up prior to the end of the trial or who were withdrawn from the trial were censored at the time of last contact. Participants who were still being treated were censored at the last available date the participant was known to be alive.

Objective response according to IMWG Uniform Response Criteria was defined as a best overall response including a complete response (CR), very good partial response (VGPR) or partial response (PR) based on the IRAC Review. A CR is defined as: negative serum and urine on immunofixation, disappearance of any soft tissue plasmacytomas and ≤5% plasma cells in BM; A VGPR is serum and urine M-protein detectable by immunofixation but not on electrophoresis or ≥90% reduction in serum M-protein and urine M-protein level <100 mg/24 hours; A PR is: ≥50% reduction of serum M-Protein and reduction in urinary M-protein by ≥90% or to <200 mg/24 hours. If present at baseline a ≥50% reduction in size of soft tissue plasmacytomas.

Objective response according to IMWG Uniform Response Criteria was defined as a best overall response including a complete response (CR), very good partial response (VGPR) or partial response (PR) based on the IRAC Review. A CR is defined s: negative serum and urine on immunofixation, disappearance of any soft tissue plasmacytomas and ≤5% plasma cells in BM; A VGPR is serum and urine M-protein detectable by immunofixation but not on electrophoresis or ≥90% reduction in serum M-protein and urine M-protein level <100 mg/24 hours; A PR is: ≥50% reduction of serum M-Protein and reduction in urinary M-protein by ≥90% or to <200 mg/24 hours. If present at baseline a ≥50% reduction in size of soft tissue plasmacytomas.

Duration of response was defined as the duration from the time when the response criteria were first met for CR or VGPR or PR based on IMWG criteria until the first date the response criteria were met for progressive disease or until the participant died from any cause, whichever occurred first.

Duration of response was defined as the duration from the time when the response criteria were first met for CR or VGPR or PR based on IMWG criteria until the first date the response criteria were met for progressive disease or until the participant died from any cause, whichever occurred first.

The time to first myeloma response was defined as the time from randomization to the time when the response criteria for at least a PR was first met based on the IMWG criteria.

The time to first myeloma response was defined as the time from randomization to the time when the response criteria for at least a PR was first met based on the IMWG criteria assessed by the investigator.

TTF is defined as the time between the randomization and discontinuation of study treatment for any reason, including disease progression (determined by IRAC based on the IMWG response criteria), treatment toxicity, start of another anti-myeloma therapy (AMT) or death.

TTF is defined as the time between the randomization and discontinuation of study treatment for any reason, including disease progression (determined by the investigators assessment based on the IMWG response criteria), treatment toxicity, start of another anti-myeloma therapy (AMT) or death.

Time to second-line anti-myeloma therapy was defined as time from randomization to the start of another non-protocol anti-myeloma therapy.

Time to second-line anti-myeloma therapy is defined as time from randomization to the start of another non-protocol anti-myeloma therapy. Those who do not receive another anti-myeloma therapy were censored at the last assessment or follow-up visit known to have received no new therapy.

Objective response according to IMWG Uniform Response Criteria was defined as a best overall response including a complete response (CR), very good partial response (VGPR) or partial response (PR) based on the IRAC Review. A CR is defined s: negative serum and urine on immunofixation, disappearance of any soft tissue plasmacytomas and ≤5% plasma cells in BM; A VGPR is serum and urine M-protein detectable by immunofixation but not on electrophoresis or ≥90% reduction in serum M-protein and urine M-protein level <100 mg/24 hours; A PR is: ≥50% reduction of serum M-Protein and reduction in urinary M-protein by ≥90% or to <200 mg/24 hours. If present at baseline a ≥50% reduction in size of soft tissue plasmacytomas.

Participants were placed in adverse and non-adverse cytogenetic risk categories at baseline and response rates evaluated. Adverse Risk: t(4;14), t(14;16), del(13q) or monosomy 13, del(17p), 1q gain Favorable Hyperdiploidy: : t(11;14), gains of 5/9/15; Normal: a normal result, gains other than 5/9/15, IgH deletion Uncertain risk: probes used for analysis cannot place participant in any of the other risk categories. Objective response = best overall response including CR, VGPR or PR based on the IRAC Review; A CR is negative serum and urine on immunofixation, disappearance of any soft tissue plasmacytomas and ≤5% plasma cells in BM; A VGPRis serum and urine M-protein detectable by immunofixation but not on electrophoresis or ≥90% reduction in serum M-protein and urine M-protein level <100 mg/24 hours; A PR is ≥50% reduction of serum M-Protein and reduction in urinary M-protein by ≥90% or to <200 mg/24 hours. If present at baseline a ≥50% reduction in size of soft tissue plasmacytomas.

Participants were placed in adverse and non-adverse cytogenetic risk categories at baseline and response rates evaluated. Adverse Risk: t(4;14), t(14;16), del(13q) or monosomy 13, del(17p), 1q gain Favorable Hyperdiploidy: : t(11;14), gains of 5/9/15; Normal: a normal result, gains other than 5/9/15, IgH deletion Uncertain risk: probes used for analysis cannot place participant in any of the other risk categories. Objective response = best overall response including CR, VGPR or PR based on the IRAC Review; A CR is negative serum and urine on immunofixation, disappearance of any soft tissue plasmacytomas and ≤5% plasma cells in BM; A VGPRis serum and urine M-protein detectable by immunofixation but not on electrophoresis or ≥90% reduction in serum M-protein and urine M-protein level <100 mg/24 hours; A PR is ≥50% reduction of serum M-Protein and reduction in urinary M-protein by ≥90% or to <200 mg/24 hours. If present at baseline a ≥50% reduction in size of soft tissue plasmacytomas.

Participants were placed in adverse and non-adverse cytogenetic risk categories at baseline and response rates evaluated. Adverse Risk: t(4;14), t(14;16), del(13q) or monosomy 13, del(17p), 1q gain Favorable Hyperdiploidy: : t(11;14), gains of 5/9/15; Normal: a normal result, gains other than 5/9/15, IgH deletion Uncertain risk: probes used for analysis cannot place participant in any of the other risk categories. Objective response = best overall response including CR, VGPR or PR based on the IRAC Review; A CR is negative serum and urine on immunofixation, disappearance of any soft tissue plasmacytomas and ≤5% plasma cells in BM; A VGPRis serum and urine M-protein detectable by immunofixation but not on electrophoresis or ≥90% reduction in serum M-protein and urine M-protein level <100 mg/24 hours; A PR is ≥50% reduction of serum M-Protein and reduction in urinary M-protein by ≥90% or to <200 mg/24 hours. If present at baseline a ≥50% reduction in size of soft tissue plasmacytomas.

Participants were placed in adverse and non-adverse cytogenetic risk categories at baseline and response rates evaluated. Adverse Risk: t(4;14), t(14;16), del(13q) or monosomy 13, del(17p), 1q gain Favorable Hyperdiploidy: : t(11;14), gains of 5/9/15; Normal: a normal result, gains other than 5/9/15, IgH deletion Uncertain risk: probes used for analysis cannot place participant in any of the other risk categories. Objective response = best overall response including CR, VGPR or PR based on the IRAC Review; A CR is negative serum and urine on immunofixation, disappearance of any soft tissue plasmacytomas and ≤5% plasma cells in BM; A VGPRis serum and urine M-protein detectable by immunofixation but not on electrophoresis or ≥90% reduction in serum M-protein and urine M-protein level <100 mg/24 hours; A PR is ≥50% reduction of serum M-Protein and reduction in urinary M-protein by ≥90% or to <200 mg/24 hours. If present at baseline a ≥50% reduction in size of soft tissue plasmacytomas.

The European Organization for Research and Treatment of Cancer (EORTC) Core Quality of Life (QOL) questionnaire (EORTC QLQ-C30) is a 30-question tool used to assess the overall quality of life in cancer patients. It consists of 15 domains: 1 global health status (GHS) scale, 5 functional scales (Physical, Role, Cognitive, Emotional, Social), and 9 symptom scales/items (Fatigue, Nausea and Vomiting, Pain, Dyspnea, Sleep Disturbance, Appetite Loss, Constipation, Diarrhea, Financial Impact). The EORTC QLQ-C30 Global Health Status/QOL scale is scored between 0 and 100, with a high score indicating better Global Health Status/QOL. Negative change from Baseline values indicate deterioration in QOL or functioning and positive values indicate improvement.

The European Organization for Research and Treatment of Cancer (EORTC) Core Quality of Life (QOL) questionnaire (EORTC QLQ-C30) is a 30-question tool used in clinical research to assess the overall quality of life in cancer patients. It consists of 15 domains: 1 global health status (GHS) scale, 5 functional scales (Physical, Role, Cognitive, Emotional, Social), and 9 symptom scales/items (Fatigue, Nausea and Vomiting, Pain, Dyspnea, Sleep Disturbance, Appetite Loss, Constipation, Diarrhea, Financial Impact). The EORTC QLQ-C30 Physical Functioning Scale is scored between 0 and 100, with a high score indicating better functioning/support. Negative change from Baseline values indicate deterioration in functioning and positive values indicate improvement.

The European Organization for Research and Treatment of Cancer (EORTC) Core Quality of Life (QOL) questionnaire (EORTC QLQ-C30) is a 30-question tool used in clinical research to assess the overall quality of life in cancer patients. It consists of 15 domains: 1 global health status (GHS) scale, 5 functional scales (Physical, Role, Cognitive, Emotional, Social), and 9 symptom scales/items (Fatigue, Nausea and Vomiting, Pain, Dyspnea, Sleep Disturbance, Appetite Loss, Constipation, Diarrhea, Financial Impact). The EORTC QLQ-C30 Role Functioning Scale is scored between 0 and 100, with a high score indicating better functioning/support. Negative change from Baseline values indicate deterioration in functioning and positive values indicate improvement.

The European Organization for Research and Treatment of Cancer (EORTC) Core Quality of Life (QOL) questionnaire (EORTC QLQ-C30) is a 30-question tool used in clinical research to assess the overall quality of life in cancer patients. It consists of 15 domains: 1 global health status (GHS) scale, 5 functional scales (Physical, Role, Cognitive, Emotional, Social), and 9 symptom scales/items (Fatigue, Nausea and Vomiting, Pain, Dyspnea, Sleep Disturbance, Appetite Loss, Constipation, Diarrhea, Financial Impact). The EORTC QLQ-C30 Emotional Functioning Scale is scored between 0 and 100, with a high score indicating better functioning/support. Negative change from Baseline values indicate deterioration in functioning and positive values indicate improvement.

The European Organization for Research and Treatment of Cancer (EORTC) Core Quality of Life (QOL) questionnaire (EORTC QLQ-C30) is a 30-question tool used in clinical research to assess the overall quality of life in cancer patients. It consists of 15 domains: 1 global health status (GHS) scale, 5 functional scales (Physical, Role, Cognitive, Emotional, Social), and 9 symptom scales/items (Fatigue, Nausea and Vomiting, Pain, Dyspnea, Sleep Disturbance, Appetite Loss, Constipation, Diarrhea, Financial Impact). The EORTC QLQ-C30 Cognitive Functioning Scale is scored between 0 and 100, with a high score indicating better functioning/support. Negative change from Baseline values indicate deterioration in functioning and positive values indicate improvement.

The European Organization for Research and Treatment of Cancer (EORTC) Core Quality of Life (QOL) questionnaire (EORTC QLQ-C30) is a 30-question tool used in clinical research to assess the overall quality of life in cancer patients. It consists of 15 domains: 1 global health status (GHS) scale, 5 functional scales (Physical, Role, Cognitive, Emotional, Social), and 9 symptom scales/items (Fatigue, Nausea and Vomiting, Pain, Dyspnea, Sleep Disturbance, Appetite Loss, Constipation, Diarrhea, Financial Impact). The EORTC QLQ-C30 Social Functioning Scale is scored between 0 and 100, with a high score indicating better functioning/support. Negative change from Baseline values indicate deterioration in functioning and positive values indicate improvement.

The European Organization for Research and Treatment of Cancer (EORTC) Core Quality of Life (QOL) questionnaire (EORTC QLQ-C30) is a 30-question tool used in clinical research to assess the overall quality of life in cancer patients. It consists of 15 domains: 1 global health status (GHS) scale, 5 functional scales (Physical, Role, Cognitive, Emotional, Social), and 9 symptom scales/items (Fatigue, Nausea and Vomiting, Pain, Dyspnea, Sleep Disturbance, Appetite Loss, Constipation, Diarrhea, Financial Impact). The EORTC QLQ-C30 Fatigue Scale is scored between 0 and 100, with a high score indicating a higher level of symptoms. Negative change from Baseline values indicate improvement in symptoms and positive values indicate worsening symptoms.

The European Organization for Research and Treatment of Cancer (EORTC) Core Quality of Life (QOL) questionnaire (EORTC QLQ-C30) is a 30-question tool used in clinical research to assess the overall quality of life in cancer patients. It consists of 15 domains: 1 global health status (GHS) scale, 5 functional scales (Physical, Role, Cognitive, Emotional, Social), and 9 symptom scales/items (Fatigue, Nausea and Vomiting, Pain, Dyspnea, Sleep Disturbance, Appetite Loss, Constipation, Diarrhea, Financial Impact). The EORTC QLQ-C30 Pain Scale is scored between 0 and 100, with a high score indicating a higher level of symptoms. Negative change from Baseline values indicate improvement in symptoms and positive values indicate worsening symptoms.

The European Organization for Research and Treatment of Cancer (EORTC) Core Quality of Life (QOL) questionnaire (EORTC QLQ-C30) is a 30-question tool used in clinical research to assess the overall quality of life in cancer patients. It consists of 15 domains: 1 global health status (GHS) scale, 5 functional scales (Physical, Role, Cognitive, Emotional, Social), and 9 symptom scales/items (Fatigue, Nausea and Vomiting, Pain, Dyspnea, Sleep Disturbance, Appetite Loss, Constipation, Diarrhea, Financial Impact). The EORTC QLQ-C30 Nausea/Vomiting Scale is scored between 0 and 100, with a high score indicating a higher level of symptoms. Negative change from Baseline values indicate improvement in symptoms and positive values indicate worsening symptoms.

The European Organization for Research and Treatment of Cancer (EORTC) Core Quality of Life (QOL) questionnaire (EORTC QLQ-C30) is a 30-question tool used in clinical research to assess the overall quality of life in cancer patients. It consists of 15 domains: 1 global health status (GHS) scale, 5 functional scales (Physical, Role, Cognitive, Emotional, Social), and 9 symptom scales/items (Fatigue, Nausea and Vomiting, Pain, Dyspnea, Sleep Disturbance, Appetite Loss, Constipation, Diarrhea, Financial Impact). The EORTC QLQ-C30 Dyspnoea Scale is scored between 0 and 100, with a high score indicating a higher level of symptoms. Negative change from Baseline values indicate improvement in symptoms and positive values indicate worsening symptoms.

The European Organization for Research and Treatment of Cancer (EORTC) Core Quality of Life (QOL) questionnaire (EORTC QLQ-C30) is a 30-question tool used in clinical research to assess the overall quality of life in cancer patients. It consists of 15 domains: 1 global health status (GHS) scale, 5 functional scales (Physical, Role, Cognitive, Emotional, Social), and 9 symptom scales/items (Fatigue, Nausea and Vomiting, Pain, Dyspnea, Sleep Disturbance, Appetite Loss, Constipation, Diarrhea, Financial Impact). The EORTC QLQ-C30 Insomnia Scale is scored between 0 and 100, with a high score indicating a higher level of symptoms. Negative change from Baseline values indicate improvement in symptoms and positive values indicate worsening symptoms.

The European Organization for Research and Treatment of Cancer (EORTC) Core Quality of Life (QOL) questionnaire (EORTC QLQ-C30) is a 30-question tool used in clinical research to assess the overall quality of life in cancer patients. It consists of 15 domains: 1 global health status (GHS) scale, 5 functional scales (Physical, Role, Cognitive, Emotional, Social), and 9 symptom scales/items (Fatigue, Nausea and Vomiting, Pain, Dyspnea, Sleep Disturbance, Appetite Loss, Constipation, Diarrhea, Financial Impact). The EORTC QLQ-C30 Appetite Loss Scale is scored between 0 and 100, with a high score indicating a higher level of appetite loss. Negative change from Baseline values indicate improvement in appetite and positive values indicate worsening of appetite.

The European Organization for Research and Treatment of Cancer (EORTC) Core Quality of Life (QOL) questionnaire (EORTC QLQ-C30) is a 30-question tool used in clinical research to assess the overall quality of life in cancer patients. It consists of 15 domains: 1 global health status (GHS) scale, 5 functional scales (Physical, Role, Cognitive, Emotional, Social), and 9 symptom scales/items (Fatigue, Nausea and Vomiting, Pain, Dyspnea, Sleep Disturbance, Appetite Loss, Constipation, Diarrhea, Financial Impact). The EORTC QLQ-C30 Constipation Scale is scored between 0 and 100, with a high score indicating a higher level of constipation. Negative change from Baseline values indicate improvement in constipation and positive values indicate worsening of constipation.

The European Organization for Research and Treatment of Cancer (EORTC) Core Quality of Life (QOL) questionnaire (EORTC QLQ-C30) is a 30-question tool used in clinical research to assess the overall quality of life in cancer patients. It consists of 15 domains: 1 global health status (GHS) scale, 5 functional scales (Physical, Role, Cognitive, Emotional, Social), and 9 symptom scales/items (Fatigue, Nausea and Vomiting, Pain, Dyspnea, Sleep Disturbance, Appetite Loss, Constipation, Diarrhea, Financial Impact). The EORTC QLQ-C30 Diarrhea Scale is scored between 0 and 100, with a high score indicating a higher level of diarrhea. Negative change from Baseline values indicate improvement in diarrhea and positive values indicate worsening of diarrhea.

The European Organization for Research and Treatment of Cancer (EORTC) Core Quality of Life (QOL) questionnaire (EORTC QLQ-C30) is a 30-question tool used in clinical research to assess the overall quality of life in cancer patients. It consists of 15 domains: 1 global health status (GHS) scale, 5 functional scales (Physical, Role, Cognitive, Emotional, Social), and 9 symptom scales/items (Fatigue, Nausea and Vomiting, Pain, Dyspnea, Sleep Disturbance, Appetite Loss, Constipation, Diarrhea, Financial Impact). The EORTC QLQ-C30 Financial Difficulties Scale is scored between 0 and 100, with a high score indicating a higher level of financial difficulties. Negative change from Baseline values indicate improvement in financial difficulties and positive values indicate worsening of financial difficulties.

EORTC QLQ-MY20 is a validated questionnaire to assess the overall quality of life in patients with multiple myeloma. EORTC QLQ-MY20 includes four scales: disease symptoms, treatment side-effects, future perspective, and body image. Questions used a 4-point scale (from 1 'Not at All' to 4 'Very Much'). Scores were averaged, and transformed to a 0-100 scale; a higher score indicates more severe disease symptom(s).

EORTC QLQ-MY20 is a validated questionnaire to assess the overall quality of life in patients with multiple myeloma. EORTC QLQ-MY20 includes four scales: disease symptoms, treatment side-effects, future perspective, and body image. Questions used a 4-point scale (from 1 'Not at All' to 4 'Very Much'). Scores were averaged, and transformed to a 0-100 scale; a higher score represents a more severe overall side effect of treatment.

EORTC QLQ-MY20 is a validated questionnaire to assess the overall quality of life in patients with multiple myeloma. EORTC QLQ-MY20 includes four scales: disease symptoms, treatment side-effects, future perspective, and body image. Questions used a 4-point scale (from 1 'Not at All' to 4 'Very Much'). Scores were averaged, and transformed to a 0-100 scale; for the future perspective scale, a higher score indicates a better perspective of the future.

EORTC QLQ-MY20 is a validated questionnaire to assess the overall quality of life in patients with multiple myeloma. EORTC QLQ-MY20 includes four scales: disease symptoms, treatment side-effects, future perspective, and body image. Questions used a 4-point scale (from 1 'Not at All' to 4 'Very Much'). Scores were averaged, and transformed to a 0-100 scale; for the body image scale, a higher score indicates a better body image.

EQ-5D is a self-administered questionnaire that assesses health-related quality of life. The EQ-5D descriptive health profile comprises five dimensions of health (mobility, self-care, usual activities, pain/discomfort, and anxiety/depression). Each dimension has 3 levels of response: No problem (1), some problems (2), and extreme problems (3). A unique EQ-5D health state is defined by combining one level from each of the five dimensions into a single utility index score. EQ-5D index values range from -0.59 to 1.00 where higher EQ-5D scores represent better health status. A positive change from baseline score indicates improvement in health status and better health state.

HRU was defined as any consumption of healthcare resources directly or indirectly related to the treatment of the patient. HRU Analysis may help in evaluating potential costs and budget impact of new treatments from a payer perspective. The rate of inpatient hospitalizations per patient year was calculated as the total number of hospitalizations divided by the total number of patient-years followed in the study period. Patient-years (PY) were calculated as the duration from baseline to last available HRQL assessment for each patient.

A TEAE is any AE occurring or worsening on or after the first treatment of any study drug, and within 30 days after the last dose of the last study drug. Severity grades according to Common Terminology Criteria for Adverse Events v3.0 (CTCAE) on a 1-5 scale: Grade 1= Mild AE, Grade 2= Moderate AE, Grade 3= Severe AE, Grade 4= Life-threatening or disabling AE, Grade 5=Death related to AE. A serious AE is any AE occurring at any dose that: • Results in death; • Is life-threatening; • Requires or prolongs existing inpatient hospitalization; • Results in persistent or significant disability/incapacity; • Is a congenital anomaly/birth defect; • Constitutes an important medical event.

Renal function was assessed for participants from baseline to the most extreme value in creatinine clearance calculated using the Cockcroft-Gault estimation.

Neutrophil counts was assessed for participants from baseline grade to most extreme severity grade using the NCI CTCAE v 3.0 grading scale.

Hemoglobin was assessed for participants from baseline grade to most extreme severity grade using the NCI CTCAE v 3.0 grading scale.

Improvement in platelets was assessed for participants from baseline grade to most extreme severity grade using the NCI CTCAE v 3.0 grading scale.

Improvement of infection rate by observing historical data compared to the data within clinical database as not analyzed.