A Study of Pirtobrutinib (LOXO-305) Versus Bendamustine Plus Rituximab (BR) in Untreated Patients With Chronic Lymphocytic Leukemia (CLL)/Small Lymphocytic Lymphoma (SLL)

PFS, as assessed by IRC, is defined as the time from randomization until documented disease progression as per iwCLL (International Workshop on Chronic Lymphocytic Leukemia) 2018 criteria, or death from any cause, whichever occurs first.

PFS, as assessed by investigator, is defined as the time from randomization until documented disease progression as per iwCLL (International Workshop on Chronic Lymphocytic Leukemia) 2018 criteria, or death from any cause, whichever occurs first.

Assessments of effectiveness include OS, assessed by investigator

TTNT is defined as time from the date of randomization to the date of initiation of the subsequent anticancer therapy for Chronic Lymphocytic Leukemia (CLL)/Small Lymphocytic Lymphoma (SLL) including the first dose date of pirtobrutinib for Arm B participants who crossed over to receive pirtobrutinib if applicable or death due to any cause, whichever occurs first.

ORR, as assessed by IRC, is defined as number of participants who achieved a best overall response of complete remission (CR), complete remission with an incomplete marrow recovery (CRi), nodular partial remission (nPR) or partial remission (PR) at or before the initiation of subsequent anticancer therapy, disease progression or death, divided by the total number of participants randomized to each treatment arm.

ORR, as assessed by investigator, is defined as number of participants who achieved a best overall response of complete remission (CR), complete remission with an incomplete marrow recovery (CRi), nodular partial remission (nPR) or partial remission (PR) at or before the initiation of subsequent anticancer therapy, disease progression or death, divided by the total number of participants randomized to each treatment arm.

DoR, as assessed by IRC, is defined as the time from the date of the first documented response (CR, CRi, nPR, or PR) until the first date of the documentation of disease progression as per iwCLL 2018 criteria, or the date of death from any cause, whichever occurs first.

DoR, as assessed by investigator, is defined as the time from the date of the first documented response (CR, CRi, nPR, or PR) until the first date of the documentation of disease progression as per iwCLL 2018 criteria, or the date of death from any cause, whichever occurs first.

A measure of CLL/SLL-related symptoms (CLL/SLL-related Symptoms score) was derived from 13 items: appetite loss, fatigue (3 items), pain, nausea, dyspnea, and insomnia from the European Organization for Research and Treatment of Cancer (EORTC) Quality of Life Questionnaire Core 30 (QLQ-C30), and night sweats, fever/chills, and fatigue (3 items) from selected items of the EORTC Item Library set 58 (IL-58). First, a raw score was calculated as mean of the item responses, then a linear transformation was applied to obtain standardized score ranging from 0 to 100, with higher score representing worse symptoms. TTW of CLL/SLL-related symptoms was defined as the time from randomization to the earliest date of the first sustained worsening in its score from baseline, meeting or exceeding the meaningful within-person change (MWPC) threshold of +5.12 points or death from any cause. Sustained worsening required that the threshold be met at two consecutive assessment timepoints.

Physical Functioning was assessed with the European Organization for Research and Treatment of Cancer (EORTC) Quality of Life Questionnaire Core 30 items (QLQ-C30) Physical Function (PF) scale consisting of 5 items to measure the impact of the disease and its treatment on a participant's ability to perform everyday physical activities, calculated from responses to the five items, each scored on a 4 point scale (1 = not at all to 4 = very much). First, a raw score was calculated as mean of the item responses, then a linear transformation was applied to obtain standardized score ranging from 0 to 100, with higher score representing better functioning. TTW of PF was defined as the time from randomization to the earliest date of the first sustained worsening from baseline, with a decline in the meaningful within-person change (MWPC) threshold of -13.33 points or death from any cause. Sustained worsening required that the threshold be met at two consecutive assessment timepoints.

Overall survival (OS) is defined as the time from randomization until death from any cause. A descriptive analysis of OS was pre-specified based on the primary endpoint data cutoff.