A Study to Customize Ibrutinib Treatment Regimens for Participants With Previously Untreated Chronic Lymphocytic Leukemia
Trial Parameters
Brief Summary
The purpose of this study is to evaluate the efficacy and safety of ibrutinib + venetoclax (I+V) and ibrutinib monotherapy regimens in which dosing of ibrutinib is either proactively reduced or reactively modified in response to adverse events (AEs).
Eligibility Criteria
Inclusion Criteria: * Diagnosis of chronic lymphocytic leukemia/ small lymphocytic lymphoma (CLL/SLL) as per International Workshop on Chronic Lymphocytic Leukemia (iwCLL) 2018 diagnostic criteria * For ibruinib + venetocIax (I+V) cohorts: eastern cooperative oncology group (ECOG) performance status of 0-1. For ibrutinib monotherapy cohorts: ECOG performance status of 0-2 * Measurable nodal disease by computed tomography (CT), defined as at least 1 lymph node greater than and equal to (\>=) 1.5 centimeters (cm) in longest diameter * A participant using oral contraceptives must use an additional contraceptive method * A participant must agree not to be pregnant, breastfeeding, or planning to become pregnant while enrolled in this study or until 1 month after last dose or per local label if more conservative (for example, 3 months in European Union or Canada and 1 month in United States) Exclusion Criteria: * Uncontrolled autoimmune hemolytic anemia or idiopathic thrombocytopenia purpura