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Study of Acalabrutinib (ACP-196) Versus Ibrutinib in Previously Treated Participants With High Risk Chronic Lymphocytic Leukemia (CLL)

A Randomized, Multicenter, Open-Label, Non-Inferiority, Phase III Study of Acalabrutinib (ACP-196) Versus Ibrutinib in Previously Treated Subjects With High Risk Chronic Lymphocytic Leukemia

Status
Active, not recruiting
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT02477696
Enrollment
533
Registered
2015-06-23
Start date
2015-07-28
Completion date
2028-01-03
Last updated
2026-08-26

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Chronic Lymphocytic Leukemia

Brief summary

This study is designed to evaluate progression-free survival (PFS) endpoint for acalabrutinib versus (vs) ibrutinib in previously treated chronic lymphocytic leukemia.

Interventions

DRUGAcalabrutinib

Participants will receive oral acalabrutinib as stated in arm description.

DRUGIbrutinib

Participants will receive oral ibrutinib as stated in arm description.

Sponsors

Acerta Pharma BV
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Men and women ≥ 18 years of age. * ECOG performance status of 0 to 2. * Diagnosis of CLL. * Must have ≥ 1 of the following high-risk prognostic factors: * Presence of 17p del by central laboratory. * Presence of 11q del by central laboratory. * Active disease meeting ≥ 1 of the following IWCLL 2008 criteria for requiring treatment * Must have received ≥ 1 prior therapies for CLL. * Meet the following laboratory parameters: * Absolute neutrophil count (ANC) ≥ 750 cells/μL or ≥ 500 cells/μL in participants with documented bone marrow involvement, and independent of growth factor support 7 days before assessment. * Platelet count ≥ 30,000 cells/μL without transfusion support 7 days before assessment. Participants with transfusion-dependent thrombocytopenia are excluded. * Serum aspartate aminotransferase (AST)/serum glutamic oxaloacetic transaminase (SGOT) and alanine aminotransferase (ALT)/serum glutamic-pyruvic transaminase (SGPT) ≤ 3.0 x upper limit of normal (ULN). * Total bilirubin ≤ 1.5 x ULN. * Estimated creatinine clearance ≥ 30 mL/min.

Exclusion criteria

* Known CNS lymphoma or leukemia. * Known prolymphocytic leukemia or history of, or currently suspected, Richter's syndrome. * Uncontrolled autoimmune hemolytic anemia or idiopathic thrombocytopenia purpura. * Prior exposure to ibrutinib or to a B-cell receptor (BCR) inhibitor or a B-cell lymphoma-2 (BCL-2) inhibitor. * Received any chemotherapy, external beam radiation therapy, anticancer antibodies, or investigational drug within 30 days before first dose of study drug. * Prior radio- or toxin-conjugated antibody therapy. * Prior allogeneic stem cell or autologous transplant. * Major surgery within 4 weeks before first dose of study drug. * Prior malignancy, except for adequately treated lentigo maligna melanoma, non-melanomatous skin cancer, in situ cervical carcinoma or other malignancy treated with no evidence of active disease \> 3 years before Screening and at low risk for recurrence. * Significant cardiovascular disease within 6 months of screening. * Known history of infection with human immunodeficiency virus (HIV). * History of stroke or intracranial hemorrhage within 6 months before randomization. * History of bleeding diathesis. * Requires or receiving anticoagulation with warfarin or equivalent vitamin K antagonists within 7 days of first dose of study drug. * Requires treatment with a strong cytochrome P450 3A (CYP3A) inhibitor/inducer.

Design outcomes

Primary

MeasureTime frameDescription
Progression-free Survival (PFS) Based on Independent Review Committee (IRC) AssessmentBaseline (Days -28 to -1) through 55.2 months (maximum observed duration)The PFS is defined as the time from date of randomization to the date of first IRC-assessed PD or death due to any cause, whichever occurred first. PD (per International Workshop on Chronic Lymphocytic Leukemia \[iwCLL\] 2008 criteria): Lymphocytes \>= 50% increase over baseline, or \>= 50% increase in lymphadenopathy/hepatomegaly/splenomegaly, or \>= 50% platelets or \> 2 g/dL hemoglobin decreases from baseline secondary to chronic lymphocytic leukemia (CLL). The PFS is assessed using the Kaplan-Meier method.

Secondary

MeasureTime frameDescription
Number of Participants With Treatment-emergent Infections Grade >= 3Day 1 through 83.5 months (maximum observed duration)Number of participants with treatment-emergent infections Grade \>=3 are reported.
Number of Participants With Treatment-emergent Richter's TransformationDay 1 through 83.5 months (maximum observed duration)Richter's transformation is defined as the occurrence of an aggressive lymphoma in participants with a previous or concomitant diagnosis of CLL. Richter's transformation was assessed by central pathology. Number of participants with treatment-emergent Richter's transformation are reported.
Number of Participants With Treatment-emergent Atrial FibrillationDay 1 through 83.5 months (maximum observed duration)Number of participants with treatment-emergent atrial fibrillation (including atrial flutter) are reported.
Overall Survival (OS)Baseline (Days -28 to -1) through 83.7 months (maximum observed duration)The OS is defined as the time from date of randomization to date of death due to any cause. The OS is assessed using the Kaplan-Meier method.
Number of Participants With Treatment-emergent Adverse Events (TEAEs) and Treatment-emergent Serious Adverse Events (TESAEs)Day 1 through 83.5 months (maximum observed duration)An adverse event (AE) is any untoward medical occurrence in a participant who received study drug without regard to possibility of causal relationship. A serious adverse event (SAE) is an AE resulting in any of the following outcomes or deemed significant for any other reason: death; initial or prolonged inpatient hospitalization; life threatening experience (immediate risk of dying); persistent or significant disability/incapacity; congenital anomaly. The TEAEs are defined as events present at baseline that worsened in intensity after administration of study drug or events absent at baseline that emerged after administration of study drug.
Number of Participants With Treatment-emergent Laboratory AbnormalitiesDay 1 through 83.5 months (maximum observed duration)Number of participants with treatment-emergent laboratory abnormalities are reported. Laboratory abnormality is defined as any abnormal finding during analysis of hematology and serum chemistry.
Number of Participants With Abnormal Vital Signs Reported as TEAEsDay 1 through 83.5 months (maximum observed duration)Number of participants with abnormal vital signs reported as TEAEs are reported. Abnormal vital signs are defined as any abnormal finding in the vital sign parameters (body temperature, blood pressure, heart rate, and respiratory rate).
Percentage of Participants With LymphocytosisDay 1 through 83.5 months (maximum observed duration)Percentage of participants with at least one occurrence of treatment-related lymphocytosis defined as an elevation in ALC of \>= 50% compared with baseline and a postbaseline assessment of \> 5000/μL in the peripheral blood are reported.
Number of Participants With Electrocardiogram (ECG) Abnormality at BaselineBaseline (Days -28 to -1)Number of participants with ECG abnormality at baseline are reported.
Number of Participants With Shift From Baseline to Worst (Grade 3 and 4) Postbaseline in Eastern Cooperative Oncology Group (ECOG) Performance StatusBaseline (Days -28 to -1) through 83.5 months (maximum observed duration)The ECOG performance status assessed participant's performance status on 5 point scale: 0=Fully active/able to carry on all pre-disease activities without restriction; 1=restricted in physically strenuous activity, ambulatory/able to carry out light or sedentary work; 2=ambulatory (\>50% of waking hours), capable of all self-care, unable to carry out any work activities; 3=capable of only limited self care, confined to bed/chair \>50% of waking hrs; 4=completely disabled, cannot carry on any self care, totally confined to bed/chair; 5=death. Number of participants with shift from baseline (Days -28 to -1) to worst Grade 3 and 4 in ECOG performance status are reported.

Countries

Australia, Belgium, Denmark, France, Germany, Hungary, Israel, Italy, Netherlands, New Zealand, Poland, Spain, Turkey (Türkiye), United Kingdom, United States

Contacts

STUDY_DIRECTORAcerta Clinical Trials

1-888-292-9613

Participant flow

Pre-assignment details

A total of 533 participants were randomized in this study of which 529 participants were treated (4 participants were randomized but not treated).

Participants by arm

ArmCount
Acalabrutinib
Participants received oral acalabrutinib (ACP196) 100 mg BID until PD, or unacceptable toxicity, or other reasons for discontinuation, whichever occurred first.
268
Ibrutinib
Participants received oral ibrutinib 420 mg QD until PD, or unacceptable toxicity, or other reasons for discontinuation, whichever occurred first.
265
Total533

Baseline characteristics

CharacteristicIbrutinibTotalAcalabrutinib
Age, Continuous
Age (years)
65.3 Years
STANDARD_DEVIATION 9.6
65.4 Years
STANDARD_DEVIATION 9.4
65.5 Years
STANDARD_DEVIATION 9.3
Ethnicity (NIH/OMB)
Hispanic or Latino
5 Participants13 Participants8 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
237 Participants472 Participants235 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
23 Participants48 Participants25 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants0 Participants0 Participants
Race (NIH/OMB)
Asian
2 Participants3 Participants1 Participants
Race (NIH/OMB)
Black or African American
8 Participants13 Participants5 Participants
Race (NIH/OMB)
More than one race
0 Participants0 Participants0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants0 Participants
Race (NIH/OMB)
Unknown or Not Reported
10 Participants15 Participants5 Participants
Race (NIH/OMB)
White
245 Participants502 Participants257 Participants
Sex: Female, Male
Sex
Female
71 Participants154 Participants83 Participants
Sex: Female, Male
Sex
Male
194 Participants379 Participants185 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
89 / 266106 / 263
other
Total, other adverse events
251 / 266251 / 263
serious
Total, serious adverse events
161 / 266177 / 263

Outcome results

Primary

Progression-free Survival (PFS) Based on Independent Review Committee (IRC) Assessment

The PFS is defined as the time from date of randomization to the date of first IRC-assessed PD or death due to any cause, whichever occurred first. PD (per International Workshop on Chronic Lymphocytic Leukemia \[iwCLL\] 2008 criteria): Lymphocytes \>= 50% increase over baseline, or \>= 50% increase in lymphadenopathy/hepatomegaly/splenomegaly, or \>= 50% platelets or \> 2 g/dL hemoglobin decreases from baseline secondary to chronic lymphocytic leukemia (CLL). The PFS is assessed using the Kaplan-Meier method.

Time frame: Baseline (Days -28 to -1) through 55.2 months (maximum observed duration)

Population: ITT population included all participants randomized and were analyzed according to the arm to which they were randomly assigned.

ArmMeasureValue (MEDIAN)
AcalabrutinibProgression-free Survival (PFS) Based on Independent Review Committee (IRC) Assessment38.4 Months
IbrutinibProgression-free Survival (PFS) Based on Independent Review Committee (IRC) Assessment38.4 Months
95% CI: [0.79, 1.27]
Secondary

Number of Participants With Abnormal Vital Signs Reported as TEAEs

Number of participants with abnormal vital signs reported as TEAEs are reported. Abnormal vital signs are defined as any abnormal finding in the vital sign parameters (body temperature, blood pressure, heart rate, and respiratory rate).

Time frame: Day 1 through 83.5 months (maximum observed duration)

Population: Safety population included all participants who received at least one dose of study drug and were analyzed as treated.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
AcalabrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsBlood pressure fluctuation0 Participants
AcalabrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsHeart rate increased0 Participants
AcalabrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsBody temperature increased0 Participants
AcalabrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsHeart rate irregular1 Participants
AcalabrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsBlood pressure decreased1 Participants
AcalabrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsHypertension26 Participants
AcalabrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsBradycardia3 Participants
AcalabrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsHypotension15 Participants
AcalabrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsAbnormal loss of weight0 Participants
AcalabrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsHyperpyrexia1 Participants
AcalabrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsBreath sounds abnormal0 Participants
AcalabrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsOrthostatic hypotension2 Participants
AcalabrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsBlood pressure systolic increased0 Participants
AcalabrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsPalpitations12 Participants
AcalabrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsCardiac murmur1 Participants
AcalabrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsPyrexia66 Participants
AcalabrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsBlood pressure increased2 Participants
AcalabrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsDyspnoea40 Participants
AcalabrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsWeight decreased29 Participants
AcalabrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsBody temperature decreased1 Participants
AcalabrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsWeight increased13 Participants
AcalabrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsDyspnoea exertional2 Participants
AcalabrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsWhite coat hypertension0 Participants
AcalabrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsTachycardia7 Participants
IbrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsWhite coat hypertension1 Participants
IbrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsAbnormal loss of weight1 Participants
IbrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsBlood pressure fluctuation1 Participants
IbrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsBlood pressure increased3 Participants
IbrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsBlood pressure decreased0 Participants
IbrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsBlood pressure systolic increased1 Participants
IbrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsBody temperature decreased0 Participants
IbrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsBody temperature increased1 Participants
IbrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsBradycardia1 Participants
IbrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsBreath sounds abnormal1 Participants
IbrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsCardiac murmur2 Participants
IbrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsDyspnoea27 Participants
IbrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsDyspnoea exertional5 Participants
IbrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsHeart rate increased1 Participants
IbrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsHeart rate irregular0 Participants
IbrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsHypertension70 Participants
IbrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsHypotension7 Participants
IbrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsHyperpyrexia0 Participants
IbrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsOrthostatic hypotension1 Participants
IbrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsPalpitations15 Participants
IbrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsPyrexia55 Participants
IbrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsTachycardia7 Participants
IbrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsWeight decreased23 Participants
IbrutinibNumber of Participants With Abnormal Vital Signs Reported as TEAEsWeight increased10 Participants
Secondary

Number of Participants With Electrocardiogram (ECG) Abnormality at Baseline

Number of participants with ECG abnormality at baseline are reported.

Time frame: Baseline (Days -28 to -1)

Population: Safety population included all participants who received at least one dose of study drug and were analyzed as treated.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
AcalabrutinibNumber of Participants With Electrocardiogram (ECG) Abnormality at BaselineAbnormal, not clinically significant86 Participants
AcalabrutinibNumber of Participants With Electrocardiogram (ECG) Abnormality at BaselineAbnormal, clinically significant4 Participants
IbrutinibNumber of Participants With Electrocardiogram (ECG) Abnormality at BaselineAbnormal, not clinically significant98 Participants
IbrutinibNumber of Participants With Electrocardiogram (ECG) Abnormality at BaselineAbnormal, clinically significant1 Participants
Secondary

Number of Participants With Shift From Baseline to Worst (Grade 3 and 4) Postbaseline in Eastern Cooperative Oncology Group (ECOG) Performance Status

The ECOG performance status assessed participant's performance status on 5 point scale: 0=Fully active/able to carry on all pre-disease activities without restriction; 1=restricted in physically strenuous activity, ambulatory/able to carry out light or sedentary work; 2=ambulatory (\>50% of waking hours), capable of all self-care, unable to carry out any work activities; 3=capable of only limited self care, confined to bed/chair \>50% of waking hrs; 4=completely disabled, cannot carry on any self care, totally confined to bed/chair; 5=death. Number of participants with shift from baseline (Days -28 to -1) to worst Grade 3 and 4 in ECOG performance status are reported.

Time frame: Baseline (Days -28 to -1) through 83.5 months (maximum observed duration)

Population: Safety population included all participants who received at least one dose of study drug and were analyzed as treated. Here, number of participants analyzed (N) signified those participants who had a baseline value and at least 1 postbaseline value of ECOG performance status score during the study.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
AcalabrutinibNumber of Participants With Shift From Baseline to Worst (Grade 3 and 4) Postbaseline in Eastern Cooperative Oncology Group (ECOG) Performance StatusBaseline=0; Postbaseline=30 Participants
AcalabrutinibNumber of Participants With Shift From Baseline to Worst (Grade 3 and 4) Postbaseline in Eastern Cooperative Oncology Group (ECOG) Performance StatusBaseline=1; Postbaseline=33 Participants
AcalabrutinibNumber of Participants With Shift From Baseline to Worst (Grade 3 and 4) Postbaseline in Eastern Cooperative Oncology Group (ECOG) Performance StatusBaseline=2; Postbaseline=34 Participants
AcalabrutinibNumber of Participants With Shift From Baseline to Worst (Grade 3 and 4) Postbaseline in Eastern Cooperative Oncology Group (ECOG) Performance StatusBaseline=0; Postbaseline=40 Participants
AcalabrutinibNumber of Participants With Shift From Baseline to Worst (Grade 3 and 4) Postbaseline in Eastern Cooperative Oncology Group (ECOG) Performance StatusBaseline=1; Postbaseline=40 Participants
AcalabrutinibNumber of Participants With Shift From Baseline to Worst (Grade 3 and 4) Postbaseline in Eastern Cooperative Oncology Group (ECOG) Performance StatusBaseline=2; Postbaseline=40 Participants
IbrutinibNumber of Participants With Shift From Baseline to Worst (Grade 3 and 4) Postbaseline in Eastern Cooperative Oncology Group (ECOG) Performance StatusBaseline=1; Postbaseline=40 Participants
IbrutinibNumber of Participants With Shift From Baseline to Worst (Grade 3 and 4) Postbaseline in Eastern Cooperative Oncology Group (ECOG) Performance StatusBaseline=0; Postbaseline=31 Participants
IbrutinibNumber of Participants With Shift From Baseline to Worst (Grade 3 and 4) Postbaseline in Eastern Cooperative Oncology Group (ECOG) Performance StatusBaseline=0; Postbaseline=40 Participants
IbrutinibNumber of Participants With Shift From Baseline to Worst (Grade 3 and 4) Postbaseline in Eastern Cooperative Oncology Group (ECOG) Performance StatusBaseline=1; Postbaseline=35 Participants
IbrutinibNumber of Participants With Shift From Baseline to Worst (Grade 3 and 4) Postbaseline in Eastern Cooperative Oncology Group (ECOG) Performance StatusBaseline=2; Postbaseline=40 Participants
IbrutinibNumber of Participants With Shift From Baseline to Worst (Grade 3 and 4) Postbaseline in Eastern Cooperative Oncology Group (ECOG) Performance StatusBaseline=2; Postbaseline=31 Participants
Secondary

Number of Participants With Treatment-emergent Adverse Events (TEAEs) and Treatment-emergent Serious Adverse Events (TESAEs)

An adverse event (AE) is any untoward medical occurrence in a participant who received study drug without regard to possibility of causal relationship. A serious adverse event (SAE) is an AE resulting in any of the following outcomes or deemed significant for any other reason: death; initial or prolonged inpatient hospitalization; life threatening experience (immediate risk of dying); persistent or significant disability/incapacity; congenital anomaly. The TEAEs are defined as events present at baseline that worsened in intensity after administration of study drug or events absent at baseline that emerged after administration of study drug.

Time frame: Day 1 through 83.5 months (maximum observed duration)

Population: Safety population included all participants who received at least one dose of study drug and were analyzed as treated.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
AcalabrutinibNumber of Participants With Treatment-emergent Adverse Events (TEAEs) and Treatment-emergent Serious Adverse Events (TESAEs)Any TEAEs262 Participants
AcalabrutinibNumber of Participants With Treatment-emergent Adverse Events (TEAEs) and Treatment-emergent Serious Adverse Events (TESAEs)Any TESAEs161 Participants
IbrutinibNumber of Participants With Treatment-emergent Adverse Events (TEAEs) and Treatment-emergent Serious Adverse Events (TESAEs)Any TEAEs259 Participants
IbrutinibNumber of Participants With Treatment-emergent Adverse Events (TEAEs) and Treatment-emergent Serious Adverse Events (TESAEs)Any TESAEs177 Participants
Secondary

Number of Participants With Treatment-emergent Atrial Fibrillation

Number of participants with treatment-emergent atrial fibrillation (including atrial flutter) are reported.

Time frame: Day 1 through 83.5 months (maximum observed duration)

Population: Safety population included all participants who received at least one dose of study drug and were analyzed as treated.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
AcalabrutinibNumber of Participants With Treatment-emergent Atrial Fibrillation32 Participants
IbrutinibNumber of Participants With Treatment-emergent Atrial Fibrillation49 Participants
Secondary

Number of Participants With Treatment-emergent Infections Grade >= 3

Number of participants with treatment-emergent infections Grade \>=3 are reported.

Time frame: Day 1 through 83.5 months (maximum observed duration)

Population: Safety population included all participants who received at least one dose of study drug and were analyzed as treated.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
AcalabrutinibNumber of Participants With Treatment-emergent Infections Grade >= 398 Participants
IbrutinibNumber of Participants With Treatment-emergent Infections Grade >= 3101 Participants
Secondary

Number of Participants With Treatment-emergent Laboratory Abnormalities

Number of participants with treatment-emergent laboratory abnormalities are reported. Laboratory abnormality is defined as any abnormal finding during analysis of hematology and serum chemistry.

Time frame: Day 1 through 83.5 months (maximum observed duration)

Population: Safety population included all participants who received at least one dose of study drug and were analyzed as treated.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
AcalabrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesAbsolute neutrophil count (decreased)124 Participants
AcalabrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesHaemoglobin (decreased)139 Participants
AcalabrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesPlatelets (decreased)119 Participants
AcalabrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesLeukocytes (decreased)60 Participants
AcalabrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesLeukocytes (increased)68 Participants
AcalabrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesAbsolute lymphocyte count (ALC) (decreased)66 Participants
AcalabrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesALC (increased)71 Participants
AcalabrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesAlanine aminotransferase (increased)73 Participants
AcalabrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesAlbumin (decreased)31 Participants
AcalabrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesAlkaline phosphatase (increased)66 Participants
AcalabrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesAspartate aminotransferase (increased)42 Participants
AcalabrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesBilirubin (increased)46 Participants
AcalabrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesCalcium (decreased)56 Participants
AcalabrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesCalcium (increased)15 Participants
AcalabrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesCreatinine (increased)164 Participants
AcalabrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesGlucose (decreased)5 Participants
AcalabrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesGlucose (increased)21 Participants
AcalabrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesPhosphate (decreased)93 Participants
AcalabrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesPotassium (decreased)27 Participants
AcalabrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesPotassium (increased)62 Participants
AcalabrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesSodium (decreased)26 Participants
AcalabrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesSodium (increased)70 Participants
AcalabrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesUrate (increased)70 Participants
IbrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesBilirubin (increased)69 Participants
IbrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesAbsolute neutrophil count (decreased)135 Participants
IbrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesPhosphate (decreased)74 Participants
IbrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesHaemoglobin (decreased)131 Participants
IbrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesCalcium (decreased)71 Participants
IbrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesPlatelets (decreased)116 Participants
IbrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesSodium (decreased)37 Participants
IbrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesLeukocytes (decreased)64 Participants
IbrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesCalcium (increased)11 Participants
IbrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesLeukocytes (increased)84 Participants
IbrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesPotassium (decreased)40 Participants
IbrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesAbsolute lymphocyte count (ALC) (decreased)65 Participants
IbrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesCreatinine (increased)168 Participants
IbrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesALC (increased)72 Participants
IbrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesUrate (increased)96 Participants
IbrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesAlanine aminotransferase (increased)70 Participants
IbrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesGlucose (decreased)13 Participants
IbrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesAlbumin (decreased)44 Participants
IbrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesPotassium (increased)52 Participants
IbrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesAlkaline phosphatase (increased)60 Participants
IbrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesGlucose (increased)23 Participants
IbrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesAspartate aminotransferase (increased)58 Participants
IbrutinibNumber of Participants With Treatment-emergent Laboratory AbnormalitiesSodium (increased)46 Participants
Secondary

Number of Participants With Treatment-emergent Richter's Transformation

Richter's transformation is defined as the occurrence of an aggressive lymphoma in participants with a previous or concomitant diagnosis of CLL. Richter's transformation was assessed by central pathology. Number of participants with treatment-emergent Richter's transformation are reported.

Time frame: Day 1 through 83.5 months (maximum observed duration)

Population: Safety population included all participants who received at least one dose of study drug and were analyzed as treated.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
AcalabrutinibNumber of Participants With Treatment-emergent Richter's Transformation13 Participants
IbrutinibNumber of Participants With Treatment-emergent Richter's Transformation14 Participants
Secondary

Overall Survival (OS)

The OS is defined as the time from date of randomization to date of death due to any cause. The OS is assessed using the Kaplan-Meier method.

Time frame: Baseline (Days -28 to -1) through 83.7 months (maximum observed duration)

Population: ITT population included all participants randomized and were analyzed according to the arm to which they were randomly assigned.

ArmMeasureValue (MEDIAN)
AcalabrutinibOverall Survival (OS)NA Months
IbrutinibOverall Survival (OS)NA Months
Secondary

Percentage of Participants With Lymphocytosis

Percentage of participants with at least one occurrence of treatment-related lymphocytosis defined as an elevation in ALC of \>= 50% compared with baseline and a postbaseline assessment of \> 5000/μL in the peripheral blood are reported.

Time frame: Day 1 through 83.5 months (maximum observed duration)

Population: Safety population included all participants who received at least one dose of study drug and were analyzed as treated.

ArmMeasureValue (NUMBER)
AcalabrutinibPercentage of Participants With Lymphocytosis72.5 Percentage of participants
IbrutinibPercentage of Participants With Lymphocytosis74.3 Percentage of participants

Source: ClinicalTrials.gov · Data processed: Aug 27, 2026