The purpose of this study is to determine the safety and efficacy of lenalidomide as a first line therapy in treating patients with B-cell Chronic Lymphocytic Leukemia. This study will compare the effects (good and bad) of lenalidomide with chlorambucil.
After notification from the US Food and Drug Administration (FDA) on 12 July 2013, Celgene agreed to discontinue the lenalidomide treatment for all patients due to an imbalance in the number of deaths in patients treated with lenalidomide versus patients treated with chlorambucil. No specific causality for this imbalance has been identified to date. Investigators were instructed to immediately discontinue all participants from experimental lenalidomide treatment and inform their patients accordingly. Participants on the Chlorambucil arm may continue up to 12 months (13 cycles) with the last participant completing in March 2014. All randomized participants will continue to be followed for overall survival and secondary primary malignancies.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
450
For patients with normal renal function (defined as CrCl ≥ 60 mL/min), 5 mg once daily on Days 1 through 28 of the first 28-day cycle, 10 mg once daily on Days 1 through 28 starting at the second cycle, 15 mg once daily starting at the third cycle and for the remainder of the study until PD or unacceptable toxicity, whichever occurs first. For patients with moderate renal impairment (defined as CrCl ≥ 30 to \< 60 mL/min), 2.5 mg once daily on Days 1 through 28 of the first 28-day cycle, 5 mg once daily on Days 1 through 28 starting at the second cycle, 7.5 mg once daily starting at the third cycle and for the remainder of the study until PD or unacceptable toxicity, whichever occurs first.
Patients assigned to the chlorambucil arm will receive oral chlorambucil tablets at 0.8 mg/kg on Days 1 and 15 of each 28-day cycle for a total duration of 12 months (approximately 13 cycles).
Kaplan-Meier Estimate of Progression Free Survival (PFS)
Progression-free survival was defined as the time from randomization to the first documented progression confirmed per investigator's assessment or death due to any cause on study, whichever occurred first. The progression date was assigned to the earliest time when any progression was observed without prior missing assessments. If withdrawal of consent or lost to follow-up occurred before documented progression or death, then these observations were censored at the date when the last complete tumor assessments determined a lack of progression
Time frame: From first dose of study drug to date of data cut-off of 18 Feb 2013; up to approximately 39 months
Kaplan-Meier Estimate of Progression Free Survival (PFS) With a Later Cut-off Date of 14 March 2014
Progression-free survival was defined as the time from randomization to the first documented progression confirmed per investigator's assessment or death due to any cause on study, whichever occurred first. Progressive disease included lymphadenopathy, an appearance of any new lesion such as enlarged lymph nodes (\> 1.5 cm), splenomegaly, hepatomegaly or other organ infiltrates, an increase by 50% or more in greatest determined diameter of any previous site or an increase by 50% or more in the sum of the product of diameters of multiple nodes. The progression date was assigned to the earliest time when any progression was observed without prior missing assessments. If withdrawal of consent or lost to follow-up occurred before documented progression or death, then these observations were censored at the date when the last complete tumor assessments determined a lack of progression.
Time frame: From randomization to data cut off date of 31 March 2014; median follow up time for all participants was 12.6 months
Number of Participants With Adverse Events (AEs)
AEs = any noxious, unintended, or untoward medical occurrence that may appear or worsen during the course of a study. It may be a new intercurrent illness, a worsening concomitant illness, an injury, or any concomitant impairment of the participant's health, regardless of cause. Serious AE (SAE) = any AE which results in death; is life-threatening; requires inpatient hospitalization or prolongation of existing hospitalization; results in persistent or significant disability/incapacity; is a congenital anomaly/birth defect; constitutes an important medical event. The severity of AEs were graded based upon the participants symptoms according to the Common Terminology Criteria for Adverse Events (CTCAE, Version 4.0); AEs were evaluated for severity according to the following scale: Grade 1 = Mild - transient or mild discomfort; no medical intervention required; Grade 2 = Moderate - mild to moderate limitation in activity; Grade 3 = Severe; Grade 4 = Life threatening; Grade 5 = Death
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California Cancer Associates for Research and Excellence cCARE
Escondido, California, United States
Innovative Clinical Research Institute
Whittier, California, United States
The Hospital of Central Connecticut
New Britain, Connecticut, United States
Cancer Center of Central Connecticut
Southington, Connecticut, United States
University Hematology Oncology Inc.
Centralia, Illinois, United States
North Chicago VA Medical Center
North Chicago, Illinois, United States
Medical Consultants, PC
Muncie, Indiana, United States
Floyd Memorial Cancer Center of Indiana, a division of Floyd Memorial Hospital and Health Services
New Albany, Indiana, United States
Purchase Cancer Group
Paducah, Kentucky, United States
University of Minnesota
Minneapolis, Minnesota, United States
...and 155 more locations
Time frame: From randomization up to data cut-off of 18 Feb 2013; Up to approximately 39 months; maximum duration of exposure for Lenalidomide was 1086 days and 406 days for Chlorambucil
Number of Participants With Adverse Events With a Later Cut-off Date of 31 March 2014
AEs = any noxious, unintended, or untoward medical occurrence that may appear or worsen during the course of a study. It may be a new intercurrent illness, a worsening concomitant illness, an injury, or any concomitant impairment of the participant's health, regardless of cause. Serious AE (SAE) = any AE which results in death; is life-threatening; requires inpatient hospitalization or prolongation of existing hospitalization; results in persistent or significant disability/incapacity; is a congenital anomaly/birth defect; constitutes an important medical event. The severity of AEs were graded based upon the participants symptoms according to the Common Terminology Criteria for Adverse Events (CTCAE, Version 4.0); AEs were evaluated for severity according to the following scale: Grade 1 = Mild - transient or mild discomfort; no medical intervention required; Grade 2 = Moderate - mild to moderate limitation in activity; Grade 3 = Severe; Grade 4 = Life threatening; Grade 5 = Death
Time frame: From randomization to the data cut-off date of 31 March 2014; Up to 53 months; maximum duration of exposure for Lenalidomide was 1140 days and 406 days for Chlorambucil
Percentage of Participants With the Best Overall Response Based on the International Workshop on Chronic Lymphocytic Leukemia (IWCLL) Guidelines
A best overall response rate is a CR, CRi, nPR or PR and is defined as: Complete Remission (CR): * No lymphadenopathy * No hepatomegaly or splenomegaly * Absence of constitutional symptoms * Polymorphonuclear leukocytes ≥ 1500/ul * No circulating clonal B-lymphocytes * Platelets \> 100,000/ul * Hemoglobin \> 11.0 g/dl * Normocellular \<30% lymphocytes, no B-lymphoid nodules; Incomplete Clinical Response (CRi): • CR without bone marrow biopsy confirmation. Nodular Partial Response (nPR): • CR with the presence of residual clonal nodules. Partial Response (PR) requires: * ≥ 50% decrease in peripheral blood lymphocyte count * ≥ 50% reduction in lymphadenopathy * ≥ 50% reduction in size of liver and/or spleen * 1 or more of the following: * Polymorphonuclear leukocytes ≥ 1500/ul * Platelets \>100,000/ul
Time frame: Up to data cut-off date of 18 Feb 2013; approximately 39 months
Percentage of Participants With a Best Overall Response Based on IWCLL Guidelines With a Later Cut-off Date of 31 March 2014
A best overall response rate is a CR, CRi, nPR or PR and is defined as: Complete Remission (CR): * No lymphadenopathy * No hepatomegaly or splenomegaly * Absence of constitutional symptoms * Polymorphonuclear leukocytes ≥ 1500/ul * No circulating clonal B-lymphocytes * Platelets \> 100,000/ul * Hemoglobin \> 11.0 g/dl * Normocellular \<30% lymphocytes, no B-lymphoid nodules; Incomplete Clinical Response (CRi): • CR without bone marrow biopsy confirmation. Nodular Partial Response: • CR with the presence of residual clonal nodules. Partial Response requires: * ≥ 50% decrease in peripheral blood lymphocyte count * ≥ 50% reduction in lymphadenopathy * ≥ 50% reduction in size of liver and/or spleen * 1 or more of the following: * Polymorphonuclear leukocytes ≥ 1500/ul * Platelets \>100,000/ul
Time frame: Up to data cut-off of 31 March 2014; approximately 53 months
Kaplan-Meier Estimate for Duration of Response
Duration of response was defined as the time from first nPR, PR, CRi, or CR to PD. Duration of response was censored at the last date that the patient was known to be progression-free for: 1) participants who had not progressed at the time of analysis; 2) participants who had withdrawn consent or were lost to follow-up prior to documentation of progression
Time frame: Up to data cut-off of 18 Feb 2013; up to approximately 39 months
Kaplan-Meier Estimate for Duration of Response With a Later Cut-off Date of 31 March 2014
Duration of response was defined as the time from first nPR, PR, CRi, or CR to PD. Duration of response was censored at the last date that the patient was known to be progression-free for: 1) patients who had not progressed at the time of analysis; 2) patients who had withdrawn consent or were lost to follow-up prior to documentation of progression
Time frame: Up to data cut-off of 31 March 2014; up to approximately 53 months
Time to Response
Time to response was calculated as the time from randomization to the first nPR, PR, CRi or CR based on IWCLL guidelines
Time frame: Up to data cut-off of 18 Feb 2013; up to approximately 39 months
Time to Response for a Later Cut-off Date of 31 March 2014
Time to response was calculated as the time from randomization to the first nPR, PR, CRi or CR based on IWCLL guidelines
Time frame: Up to data cut-off of 31 March 2014; up to approximately 53 months
Kaplan Meier Estimate of Overall Survival
Overall Survival is defined as the time between randomization and death from any cause.
Time frame: Up to data cut off of 31 March 2014; median follow-up for all participants was 18.8 months
Kaplan Meier Estimate for Overall Survival at the Final Analysis
Overall Survival is defined as the time between randomization and death from any cause. Overall survival was censored at the last date that the subject was known to be alive for participants who were alive as of the data cutoff date and for participants who were lost to follow-up before death was documented.
Time frame: Up to the last patient last visit date of 19 May 2018; median follow-up for all participants was 46.7 months
Functional Assessment of Cancer Therapy-General to Create the FACT-Leukemia (FACT-Leu) Quality of Life Instrument
The FACT-Leu scale is a valid, reliable, and efficient measure of leukemia-specific health-related quality of life for acute and chronic disease. The FACT-Leu is described as including 27 items that assess 17 physical symptoms (fevers, bleeding, general pain, stomach pain, chills, night sweats, bruising, lymph node swelling, weakness, tiredness, weight loss, appetite, shortness of breath, functional ability, diarrhea, concentration, and mouth sores) and 10 emotional/social concerns (frustration with activity limitation, discouraged by illness, future planning, uncertainty, worry about illness, emotional lability, isolation, infertility concern, family worry, and worry about infections).
Time frame: Day 1 and once every 8 weeks
Euro Quality of Life Five Dimension (EQ-5D) Questionnaire
The standardized extended version of EQ-5D was designed for the collection of health state values using a visual analogue scale (VAS) rating scale - a vertical 20 cm visual analogue scale with the end points labeled best imaginable health state at the top and worst imaginable health state at the bottom having numeric values of 100 and 0 respectively. The participant is asked to indicate his/her health state by ticking (or placing a cross) in the box against the most appropriate statement in each of the 5 dimensions.
Time frame: Day 1 and once every 8 weeks
Number of Participants and Types of Subsequent Anti-cancer Therapies Received Post Treatment
Subsequent anti-cancer therapies administered to participants following the discontinuation of study drug (either Lenalidomide or Chlorambucil)
Time frame: Up to the last patient last visit date of 19 May 2018; median follow-up for all participants was 46.7 months