Ofatumumab Versus Rituximab Salvage Chemoimmunotherapy Followed by Autologous Stem Cell Transplant in Relapsed or Refractory Diffuse Large B Cell Lymphoma

Progression-free survival is defined as the interval of time from the randomization date until the date of stable disease (SD; failure to attain the criteria needed for a CR or PR and no fulfillment of the criteria for progressive disease [PD]) after two cycles of salvage chemotherapy, progression, or death, whichever occurs first. Disease progression was based on the assessments of independent reviewers for the disease under study. Disease progression was based on imaging data via the Revised Response Criteria for Malignant Lymphoma (RRCML).

OR is defined as the number of participants achieving either a complete response (CR) or a partial response (PR). CR is defined as the complete disappearance of all detectable clinical evidence of disease and disease-related symptoms. PR is defined as at least a 50% decrease from Baseline in the sum of the product of the diameters of target lesions. RRCML was used to assess CR and PR.

OR is defined as the number of participants achieving either a complete response (CR) or a partial response (PR). CR is defined as the complete disappearance of all detectable clinical evidence of disease and disease-related symptoms. PR is defined as at least a 50% decrease from Baseline in the sum of the product of the diameters of target lesions. RRCML was used to assess CR and PR.

Event-free survival is defined as the time from randomization to progressive disease (PD; disease whose course is growth, or spread of the disease), stable disease (SD; failure to attain the criteria needed for a CR or PR and no fulfillment of the criteria for PD) after completion of 2 cycles of therapy, commencement of a new treatment for diffuse large B cell lymphoma (DLBCL) (e.g., radiotherapy), or death from any cause, whichever occurs first. Disease progression was based on the assessments of independent reviewers for the disease under study. Disease progression was based on imaging data via the Revised Response Criteria for Malignant Lymphoma (RRCML).

OS is defined as the time from randomization to death due to any cause. Participants who were still alive by the end of the study were censored.

Stem cell mobilization is the process of stimulating the hematopoietic stem cells (CD34+) to move out of the bone marrow and into the bloodstream, where they can be collected via a process called apheresis. Successful mobilization is defined as the collection of >2*10^6 CD34+ cells/kg. Only those participants, who commenced harvest, following the administration of rituximab or ofatumumab in combination with DHAP combination chemotherapy, were assessed. The number of participants with adequate harvest of CD34+ stem cells (at least 2*10^6 CD34+ cells/kg) after dosing of salvage therapy in Cycle 2 and Cycle 3 was analyzed.

The number of participants who completed ASCT is reported.

The FACT-G was developed by the Functional Assessment of Chronic Illness Therapy (FACIT) group for use in adults in a wide range of oncology clinical trial populations. The 27 items of the FACT-G are scored in the following domains: Physical Well-being (7 items), Social/Family Wellbeing (7 items), Emotional Well-being (6 items), and Functional Well-being (7 items). Participants responded to the items on a five-point Likert scale ranging from 0, "Not at all" to 4, "Very much." The total score ranges from 0 to 108; higher scores indicate a better patient-reported outcome/quality of life. Participants were asked to think back over the past week when responding to the items.

The FACT-Lym TOI is a measure that combines the FACT-Lym subscale (15 items; responses to each item range from 0, "Not at all" to 4, "Very much") with two domains taken from the FACT-G (responses to each item range from "Not at all " to "Very much"): Physical Well-being (7 items: lack of energy, nausea, meeting family needs, pain, side effects, feels ill, spends time in bed) and Functional Well-being (7 items: ability to work, work fulfilment, ability to enjoy life, illness acceptance, ability to sleep well, enjoying things done for fun, satisfaction with quality of life). This index is designed to be sensitive to changes in treatment regimens. The total FACT-Lym TOI score ranges from 0 to 116; higher scores indicate a better patient-reported outcome/quality of life. Participants were asked to think back over the past week when responding to the items.

Neutrophil (absolute neutrophil count [ANC]) recovery is defined as ANC >=0.5*10^9/Liter and increasing, and platelet (PLT) recovery is defined as PLT >=10*10^9/Liter and increasing. For each cycle, time to ANC recovery is defined as the time from the first dose to the first ANC >=0.5*10^9/Liter and increasing after the nadir in the cycle. For each cycle, time to PLT recovery is defined as the time from the first dose to the first PLT >=10*10^9/L and increasing after the nadir in the cycle.

Engraftment is defined as 1) three consecutive days when the ANC is ≥0.5x109/L and 2) an unsupported platelet count of ≥20x109/L, and the engraftment date is the date that this occurs. If engraftment was not achieved by Day 42 or the last observation, engraftment was deemed to be a failure, and censoring took place at Day 42 or at the last observation.