Ofatumumab in Patients With Relapsed/Progressive Diffused Large B-Cell Lymphoma (DLBCL) Ineligible for or Relapse/Progression After Transplant

Experimental: Ofatumumab

8 weekly intra-venous (I.V.) infusions, 1 x 300mg and 7 x 1000mg

Medicamento: Ofatumumab

8 weekly intra-venous (i.v.) infusions, 1 x 300mg and 7 x 1000mg

Number of Participants With Objective Response

Objective response of ofatumumab treatment was assessed according to the "revised response criteria for malignant lymphoma." Participants with objective response were defined as responders with complete remission (CR) or partial remission (PR) of disease. CR is defined as the disappearance of all evidence of disease, and PR is defined as the regression of measurable disease with no new sites of disease.

Number of Participants Classified as Responders and Non-responders for Objective Response

According to the "revised response criteria for malignant lymphoma," responders included participants with CR and PR, and non-responders included participants with stable disease (SD) and progressive disease (PD). Participants not evaluable (NE) were also considered to be non-responders. PD is defined as any new lesion or an increase by more than or equal to 50% of previously involved sites from baseline. SD is defined as failure to attain CR, PR, or PD.

Duration of Response

The duration of response was defined as the time from the initial response (CR or PR) to the time of relapse, progression, or death. If the participant was lost to follow-up, the endpoint was censored, and the censoring date was the date of the last attended visit at which the endpoint was assessed.

Progression-free Survival (PFS)

PFS was defined as the time from treatment start until progression or death.

Time to Next Diffuse Large B-Cell Lymphoma (DLBCL) Therapy

Time to next DLBCL therapy was defined as the time from the first infusion date to the time of the first administration of the next DLBCL treatment other than ofatumumab. If the participants were lost to follow-up, the endpoint was censored, and the censoring date was the date of the last attended visit at which the endpoint was assessed.

Overall Survival (OS)

Overall survival is defined as the time from first infusion to death. Overall survival was a secondary endpoint in the study. However, since many participants withdrew from the study after developing disease progression overall survival could not be reliably estimated.

Number of Participants With Positive Human Anti-human Antibodies (HAHA) at Screening and at Visits 12, 13, 14, and 18

HAHA are indicators of immune response to ofatumumab. Blood samples were collected from participants at Visits 1, 12, 13, 14, and 18 and analyzed in batches. The number of participants with positive results at each visit is reported.

Median Percent Change From Baseline in CD45+CD19+ and CD45+CD20+ Cells in the Peripheral Blood at the Indicated Visits

B cells (CD45+CD19+ and CD45+CD20+) were measured in peripheral blood samples by flow cytometry. Percent change from Baseline = (value at the indicated visits minus the value at Baseline divided by the value at Baseline) * 100.

Number of Participants Who Experienced at Least One Adverse Event (AE)

An AE is defined as any untoward medical occurrence in a participant administered a pharmaceutical product that does not necessarily have a causal relationship with this treatment. The protocol-defined AE reporting period was from the first infusion (Visit 2/Week 0) to Visit 18 (Month 24 of follow-up) or time of withdrawal (treatment and follow-up).

Percent Change From Screening in Complement (CH50) Levels

CH50 was mistakenly registered as an outcome measure with the protocol record. Samples were not collected, and no analysis will take place. Thus, no data will be reported for this outcome measure.

AUC(0-inf) and AUC(0-168) for Ofatumumab at the Eighth Infusion

AUC is defined as the area under the ofatumumab concentration-time curve as a measure of drug exposure. AUC(0-168) is the AUC from the start of infusion to 168 hours after the start of the infusion; AUC(0-inf) is the AUC from the start of infusion extrapolated to infinity.

Cmax and Ctrough for Ofatumumab at the First and Eighth Infusions

Cmax is defined as the maximum concentration of drug in serum samples. Ctrough is defined as the minimum observed concentration prior to the start of the next dose. No drug is present prior to the first infusion; therefore, there are no Ctrough results for the first dose.

Half-life (T1/2) for Ofatumumab at the Eighth Infusion

t1/2 is defined as terminal half-life and is the time required for the amount of drug in the body to decrease by half.

Clearance (CL) of Ofatumumab at the Eighth Infusion

CL is the clearance of drug from serum, which is defined as the volume of serum from which the drug is cleared per unit time.

Volume of Distribution at Steady State (Vss) of Ofatumumab at the Eighth Infusion

Vss is the volume of distribution at steady state of ofatumumab.