Ibrutinib Plus Venetoclax in Subjects With Treatment-naive Chronic Lymphocytic Leukemia /Small Lymphocytic Lymphoma (CLL/SLL)

DFS is defined as time from randomization date to MRD-positive relapse, or disease progression per investigator assessment (per 2008 International Workshop for Chronic Lymphocytic Leukemia [IWCLL] criteria [Halleck et al]) or death from any cause, whichever occurred first. 1-year DFS estimated using Kaplan-Meier method at 12 months landmark time.

CR/CRi rate is defined as the percentage of participants achieving a best overall response of complete response (CR), CR with incomplete blood count recovery (CRi) per 2008 IWCLL criteria (halleck et al.) on or prior to initiation of subsequent antineoplastic therapy or, if applicable, reintroduction of study treatment, whichever occurred earlier.

CR/CRi rate is defined as the percentage of participants achieving a best overall response of CR or CRi per 2008 IWCLL criteria (Halleck et al.) on or prior to initiation of subsequent antineoplastic therapy or, if applicable, reintroduction of study treatment, whichever occurred earlier.

Median follow up duration for the individual MRD Cohort treatment arms: Confirmed uMRD Ibrutinib arm 69.1 months; Confirmed uMRD Placebo arm 67.4 months; uMRD Not Confirmed Ibrutinib arm 47.9 months; uMRD Not Confirmed Ibrutinib + Venetoclax arm 47.9 months.

ORR, defined as the percentage of participants achieving a best overall response of protocol-specified complete response (CR), CR with incomplete blood count recovery (CRi), nodular partial response (nPR), partial response (PR), or PR with lymphocytosis (PRL) evaluated in accordance with the 2008 IWCLL criteria (Halleck et al). Participants who did not have any postbaseline response assessment were considered as non-responders. This table is based on response assessments performed on or prior to initiation of subsequent antineoplastic therapy or, if applicable, reintroduction of study treatment, whichever occurs earlier. Kaplan-Meier estimate.

Median follow up duration for the individual MRD Cohort treatment arms: Confirmed uMRD Ibrutinib arm 69.1 months; Confirmed uMRD Placebo arm 67.4 months; uMRD Not Confirmed Ibrutinib arm 47.9 months; uMRD Not Confirmed Ibrutinib + Venetoclax arm 47.9 months.

Duration of response was calculated for participants achieving a response (CR, CRi, nPR, PR) based on 2008 IWCLL response criteria (Halleck et al.) and defined as the interval between the date of initial documentation of a response including PR with lymphocytosis, until disease progression (PD) or death from any cause, whichever occurred first. As the median DOR was not reached as of 67.0 months study follow-up, the Kaplan-Meier estimate of DOR at 42 months landmark time was presented.

Median follow up duration for the individual MRD Cohort treatment arms: Confirmed uMRD Ibrutinib arm 69.1 months; Confirmed uMRD Placebo arm 67.4 months; uMRD Not Confirmed Ibrutinib arm 47.9 months; uMRD Not Confirmed Ibrutinib + Venetoclax arm 47.9 months.

MRD negativity rate is defined as the percentage of participants achieving MRD negativity, which is defined as <1 CLL cell per 10,000 leukocytes (<1 x 10^-4) as assessed by flow cytometry of a peripheral blood (PB) or bone marrow (BM) aspirate sample per central laboratory on or prior to initiation of subsequent antineoplastic therapy or, if applicable, reintroduction of study treatment, whichever occurs earlier.

Median follow up duration for the individual MRD Cohort treatment arms: Confirmed uMRD Ibrutinib arm 69.1 months; Confirmed uMRD Placebo arm 67.4 months; uMRD Not Confirmed Ibrutinib arm 47.9 months; uMRD Not Confirmed Ibrutinib + Venetoclax arm 47.9 months.

TLS risk reduction was summarized by the percentage of participants with TLS risk reduced from high at baseline to medium or low after ibrutinib lead-in. A reduction in TLS risk from high risk to medium or low risk is clinically meaningful because there is a reduction in the extent of TLS monitoring and risk of hospitalization. TLS risk category is defined as the tumor burden category, where: Low=All lymph nodes (LN) < 5 cm AND absolute lymphocyte count (ALC) < 25 x 10^9/L; Medium=Any LN 5 cm to < 10 cm OR ALC ≥ 25 x 10^9/L; High=Any LN ≥ 10 cm OR ALC ≥ 25 x10^9/L AND any LN ≥ 5 cm.

PFS was defined as time from the first dose date of study treatment until disease progression (PD) or death from any cause, whichever occurs first. Assessment of PD was conducted in accordance with the 2008 IWCLL criteria (Halleck et al). As the median PFS was not reached as of the overall median 67.0 months study follow-up, the Kaplan-Meier estimate of PFS rate at 48 months landmark time was presented.

Median follow up duration for the individual MRD Cohort treatment arms: Confirmed uMRD Ibrutinib arm 69.1 months; Confirmed uMRD Placebo arm 67.4 months; uMRD Not Confirmed Ibrutinib arm 47.9 months; uMRD Not Confirmed Ibrutinib + Venetoclax arm 47.9 months.

OS is defined as the time from the first dose date of study treatment until date of death due to any cause. As the median OS was not reached as of the overall median 67.0 months study follow-up, the Kaplan-Meier estimate of OS rate at 48 months landmark time was presented.

Median follow up duration for the individual MRD Cohort treatment arms: Confirmed uMRD: Randomized to Ibrutinib=69.1 months; Confirmed uMRD: Randomized to Placebo=67.4 months; uMRD Not Confirmed: Randomized to Open-Label Ibrutinib=47.9 months; uMRD Not Confirmed: Randomized to Open-Label Ibrutinib + Venetoclax=47.9 months.

An adverse event (AE) is any untoward medical occurrence, which does not necessarily have a causal relationship with this treatment. A serious adverse event (SAE) is any untoward medical occurrence that at any dose: results in death; is life-threatening; requires unplanned in-patient hospitalization >24 hours or prolongation of existing hospitalization; results in persistent or significant disability/incapacity; is a congenital anomaly/birth defect; is an important medical event. Severity of events were graded according to the Common Terminology Criteria for Adverse Events version 4.03: mild=grade1, moderate=grade 2, severe=grade 3, life-threatening=grade 4, death=grade 5. Causal relation of study drug and event was assessed as not related, unlikely, possibly or probably related to the study drug.

ORR is defined as the percentage of participants who achieve a best overall response CR, CRi, nPR, PR, or PRL as evaluated by investigator using 2008 IWCLL criteria (Halleck et al.). Participants who did not have any postbaseline response assessment were considered as non-responders. This table is based on response assessments performed on or prior to initiation of subsequent antineoplastic therapy or, if applicable, reintroduction of study treatment, whichever occurs earlier. Kaplan-Meier estimate.

Duration of response was calculated for participants achieving a response (CR, CRi, nPR, PR) based on 2008 IWCLL response criteria (Halleck et al.) and defined as the interval between the date of initial documentation of a response including PR with lymphocytosis, until disease progression (PD) or death from any cause, whichever occurred first. As the median DOR was not reached as of the median 27.9 months study follow-up, the Kaplan-Meier estimate of DOR at 60 months landmark time was presented.

MRD negativity rate is defined as the percentage of participants achieving MRD negativity, which is defined as <1 CLL cell per 10,000 leukocytes (<1 x 10^-4) as assessed by flow cytometry of a peripheral blood (PB) or bone marrow (BM) aspirate sample per central laboratory on or prior to initiation of subsequent antineoplastic therapy or, if applicable, reintroduction of study treatment, whichever occurs earlier.

PFS was defined as time from the first dose date of study treatment until disease progression (PD) or death from any cause, whichever occurs first. Assessment of PD was conducted in accordance with the 2008 IWCLL criteria (Halleck et al). As the median PFS was not reached as of the median 69.0 months study follow-up, the Kaplan-Meier estimate of PFS rate at 66 months landmark time was presented.

OS is defined as the time from the first dose date of study treatment until date of death due to any cause. As the median OS was not reached as of the median 69.0 months study follow-up, the Kaplan-Meier estimate of OS rate at 66 months landmark time was presented.

TLS risk reduction was summarized by the percentage of participants with TLS risk reduced from high at baseline to medium or low after ibrutinib lead-in. A reduction in TLS risk from high risk to medium or low risk is clinically meaningful because there is a reduction in the extent of TLS monitoring and risk of hospitalization. TLS risk category is defined as the tumor burden category, where: Low=All lymph nodes (LN) < 5 cm AND absolute lymphocyte count (ALC) < 25 x 10^9/L; Medium=Any LN 5 cm to < 10 cm OR ALC ≥ 25 x 10^9/L; High=Any LN ≥ 10 cm OR ALC ≥ 25 x10^9/L AND any LN ≥ 5 cm.

An AE is any untoward medical occurrence, which does not necessarily have a causal relationship with this treatment. An SAE is any untoward medical occurrence that at any dose: results in death; is life-threatening; requires unplanned in-patient hospitalization >24 hours or prolongation of existing hospitalization; results in persistent or significant disability/incapacity; is a congenital anomaly/birth defect; is an important medical event. Severity of events were graded according to the Common Terminology Criteria for Adverse Events version 4.03: mild=grade1, moderate=grade 2, severe=grade 3, life-threatening=grade 4, death=grade 5. Causal relation of study drug and event was assessed as not related, unlikely, possibly or probably related to the study drug.