A Study of Polatuzumab Vedotin in Combination With Rituximab or Obinutuzumab, Cyclophosphamide, Doxorubicin, and Prednisone in Participants With B-Cell Non-Hodgkin's Lymphoma

Study Overview
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Brief Summary
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This multicenter, open-label, dose-escalation study will evaluate the safety, tolerability, pharmacokinetics, and anti-tumor activity of polatuzumab vedotin in combination with rituximab or obinutuzumab, cyclophosphamide, doxorubicin, and prednisone (CHP chemotherapy) in participants with non-Hodgkin's lymphoma (NHL). Participants will receive escalating doses of polatuzumab vedotin intravenously (IV) every 3 weeks in combination with standard doses of rituximab plus CHP chemotherapy (R-CHP) or obinutuzumab plus CHP chemotherapy (G-CHP). Participants will be treated for a total of six or eight cycles in accordance with local institutional practice. Two parallel treatment arms will explore doses of polatuzumab vedotin in combination with R-CHP or G-CHP. The maximum tolerated dose (MTD) or recommended Phase 2 dose (RP2D) of polatuzumab vedotin in combination with R-CHP will be identified before it is combined with G-CHP. Once the MTD or RP2D is determined, polatuzumab vedotin will be dosed at MTD or RP2D -1 in combination with G-CHP to start the dose escalation of this combination.

Official Title
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A Phase Ib/II Study Evaluating the Safety, Tolerability and Anti-Tumor Activity of Polatuzumab Vedotin (DCDS4501A) in Combination With Rituximab or Obinutuzumab, Cyclophosphamide, Doxorubicin, and Prednisone in Patients With B-Cell Non-Hodgkin's Lymphoma

Conditions
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Lymphoma, Non Hodgkin

Intervention / Treatment
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* Drug: Cyclophosphamide
* Drug: Doxorubicin
* Drug: Obinutuzumab
* Drug: Polatuzumab Vedotin
* Drug: Prednisolone
* Drug: Prednisone
* Drug: Rituximab


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: All Participants: At least one bi-dimensionally measurable lesion, defined as greater than (>) 1.5 centimeters (cm) in its longest dimension Life expectancy of at least 24 weeks Eastern Cooperative Oncology Group (ECOG) performance status of 0, 1, or 2 Adequate hematologic function (unless inadequate function is due to underlying disease, as established by extensive bone marrow involvement or is due to hypersplenism secondary to the involvement of the spleen by lymphoma per the investigator) Agreement to use highly effective contraception measures. Women of childbearing potential must agree to remain abstinent or use contraceptive measures that result in a failure rate of <1 percent (%) per year during the treatment period and for at least 12 months for R-CHP arm or for at least 18 months for G-CHP arm after the last dose of study drug. Men must agree to remain abstinent or to use a condom plus an additional contraceptive method that together result in a failure rate of <1% per year during the treatment period and for at least 5 months after the last dose of study drug Dose-Escalation Portion of the Study: Histologically confirmed B-cell NHL: Participants with newly diagnosed B-cell NHL or relapsed/refractory B-cell NHL are eligible No more than one prior systemic treatment regimen for B-cell NHL (single agent anti-cluster of differentiation [CD] 20 monoclonal antibody therapy will not be counted as a prior treatment regimen) No prior treatment with anthracyclines Expansion Portion of the Study: Previously untreated participants with diffuse large B-cell lymphoma (DLBCL) International Prognostic Index (IPI) score of 2-5 Exclusion Criteria: Dose-Escalation Portion of the Study: Diagnosis of primary mediastinal DLBCL Expansion Portion of the Study: Participants with transformed lymphoma Prior therapy for NHL All Participants: Prior stem cell transplant History of severe allergic or anaphylactic reactions to humanized or murine monoclonal antibodies or known sensitivity or allergy to murine products Contraindication to receive any of the individual components of R-CHP or G-CHP Current Grade greater than (>) 1 peripheral neuropathy Ongoing corticosteroid use of >30 milligrams per day (mg/day) of prednisone/prednisolone or equivalent. Participants receiving corticosteroid treatment with less than or equal to (</=) 30 mg/day of prednisone/prednisolone or equivalent must be documented to be on a stable dose of at least 4 weeks' duration before Cycle 1 Day 1 Primary central nervous system (CNS) lymphoma Vaccination with live vaccines within 6 months before Cycle 1 Day 1 History of other malignancy that could affect compliance with the protocol or interpretation of results. Participants with a history of curatively treated basal or squamous cell carcinoma or melanoma of the skin or in situ carcinoma of the cervix are eligible. Participants with a malignancy that has been treated with surgery alone with curative intent will also be excluded unless the malignancy has been in documented remission without treatment for greater than or equal to (</=) 5 years before enrollment Evidence of significant, uncontrolled concomitant diseases, including renal disease that would preclude chemotherapy administration, or pulmonary disease (including obstructive pulmonary disease and history of bronchospasm) Significant cardiovascular disease (such as New York Heart Association Class III or IV cardiac disease, congestive heart failure, myocardial infarction within the previous 6 months, unstable arrhythmias, or unstable angina) or significant pulmonary disease Known active bacterial, viral, fungal, mycobacterial, parasitic, or other infection (excluding fungal infections of nail beds) at study enrollment or any major episode of infection requiring treatment with IV antibiotics or hospitalization (relating to the completion of the course of antibiotics) within 4 weeks before Cycle 1 Day 1 Clinically significant history of liver disease, including viral or other hepatitis, current alcohol abuse, or cirrhosis Positive for hepatitis B or hepatitis C infection Prior radiotherapy to the mediastinal/pericardial region Pregnant or lactating women Recent major surgery within 6 weeks before the start of Cycle 1 Day 1

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Polatuzumab Vedotin (1.4mg) + G-CHP<br>Dose Escalation: Participants will receive a total of six to eight 21-day cycles of polatuzumab vedotin in combination with G-CHP. | Drug: Cyclophosphamide<br>* Cyclophosphamide will be administered at 750 milligrams per square meter (mg/m^2) IV every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles.<br>Drug: Doxorubicin<br>* Doxorubicin will be administered at 50 mg/m^2 IV every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles.<br>Drug: Obinutuzumab<br>* Obinutuzumab will be administered at 1000 milligrams (mg) IV on Cycle 1 Days 1, 8, and 15 and on Day 1 of Cycles 3-8.<br>* Other names: Gazyva/Gazyvaro;Drug: Polatuzumab Vedotin<br>* Polatuzumab vedotin will be administered at escalating doses (at a starting dose of 1 mg/kg) IV every 3 weeks, for 6 or 8 cycles.<br>* Other names: DCDS4501A;Drug: Prednisolone<br>* Prednisolone will be administered at 100 mg orally daily for 5 days every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles. Prednisone at 100 mg orally from Day -7 to Day -1 may be given at the discretion of the treating investigator physician.<br>Drug: Prednisone<br>* Prednisone will be administered at 100 mg orally daily for 5 days every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles. Prednisone at 100 mg orally from Day -7 to Day -1 may be given at the discretion of the treating investigator physician.<br>|
| Experimental: Polatuzumab Vedotin (1.0mg) + R-CHP<br>Dose Escalation: Participants will receive a total of six to eight 21-day cycles of polatuzumab vedotin in combination with R-CHP. | Drug: Cyclophosphamide<br>* Cyclophosphamide will be administered at 750 milligrams per square meter (mg/m^2) IV every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles.<br>Drug: Doxorubicin<br>* Doxorubicin will be administered at 50 mg/m^2 IV every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles.<br>Drug: Polatuzumab Vedotin<br>* Polatuzumab vedotin will be administered at escalating doses (at a starting dose of 1 mg/kg) IV every 3 weeks, for 6 or 8 cycles.<br>* Other names: DCDS4501A;Drug: Prednisolone<br>* Prednisolone will be administered at 100 mg orally daily for 5 days every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles. Prednisone at 100 mg orally from Day -7 to Day -1 may be given at the discretion of the treating investigator physician.<br>Drug: Prednisone<br>* Prednisone will be administered at 100 mg orally daily for 5 days every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles. Prednisone at 100 mg orally from Day -7 to Day -1 may be given at the discretion of the treating investigator physician.<br>Drug: Rituximab<br>* Rituximab will be administered at 375 mg/m^2 IV every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles.<br>* Other names: MabThera/Rituxan;|
| Experimental: Polatuzumab Vedotin (1.8mg) + G-CHP<br>Dose Escalation: Participants will receive a total of six to eight 21-day cycles of polatuzumab vedotin in combination with G-CHP. | Drug: Cyclophosphamide<br>* Cyclophosphamide will be administered at 750 milligrams per square meter (mg/m^2) IV every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles.<br>Drug: Doxorubicin<br>* Doxorubicin will be administered at 50 mg/m^2 IV every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles.<br>Drug: Obinutuzumab<br>* Obinutuzumab will be administered at 1000 milligrams (mg) IV on Cycle 1 Days 1, 8, and 15 and on Day 1 of Cycles 3-8.<br>* Other names: Gazyva/Gazyvaro;Drug: Polatuzumab Vedotin<br>* Polatuzumab vedotin will be administered at escalating doses (at a starting dose of 1 mg/kg) IV every 3 weeks, for 6 or 8 cycles.<br>* Other names: DCDS4501A;Drug: Prednisolone<br>* Prednisolone will be administered at 100 mg orally daily for 5 days every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles. Prednisone at 100 mg orally from Day -7 to Day -1 may be given at the discretion of the treating investigator physician.<br>Drug: Prednisone<br>* Prednisone will be administered at 100 mg orally daily for 5 days every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles. Prednisone at 100 mg orally from Day -7 to Day -1 may be given at the discretion of the treating investigator physician.<br>|
| Experimental: Polatuzumab Vedotin (1.4mg) + R-CHP<br>Dose Escalation: Participants will receive a total of six to eight 21-day cycles of polatuzumab vedotin in combination with R-CHP. | Drug: Cyclophosphamide<br>* Cyclophosphamide will be administered at 750 milligrams per square meter (mg/m^2) IV every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles.<br>Drug: Doxorubicin<br>* Doxorubicin will be administered at 50 mg/m^2 IV every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles.<br>Drug: Polatuzumab Vedotin<br>* Polatuzumab vedotin will be administered at escalating doses (at a starting dose of 1 mg/kg) IV every 3 weeks, for 6 or 8 cycles.<br>* Other names: DCDS4501A;Drug: Prednisolone<br>* Prednisolone will be administered at 100 mg orally daily for 5 days every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles. Prednisone at 100 mg orally from Day -7 to Day -1 may be given at the discretion of the treating investigator physician.<br>Drug: Prednisone<br>* Prednisone will be administered at 100 mg orally daily for 5 days every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles. Prednisone at 100 mg orally from Day -7 to Day -1 may be given at the discretion of the treating investigator physician.<br>Drug: Rituximab<br>* Rituximab will be administered at 375 mg/m^2 IV every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles.<br>* Other names: MabThera/Rituxan;|
| Experimental: Polatuzumab Vedotin (1.8mg) + R-CHP<br>Dose Escalation: Participants will receive a total of six to eight 21-day cycles of polatuzumab vedotin in combination with R-CHP. | Drug: Cyclophosphamide<br>* Cyclophosphamide will be administered at 750 milligrams per square meter (mg/m^2) IV every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles.<br>Drug: Doxorubicin<br>* Doxorubicin will be administered at 50 mg/m^2 IV every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles.<br>Drug: Polatuzumab Vedotin<br>* Polatuzumab vedotin will be administered at escalating doses (at a starting dose of 1 mg/kg) IV every 3 weeks, for 6 or 8 cycles.<br>* Other names: DCDS4501A;Drug: Prednisolone<br>* Prednisolone will be administered at 100 mg orally daily for 5 days every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles. Prednisone at 100 mg orally from Day -7 to Day -1 may be given at the discretion of the treating investigator physician.<br>Drug: Prednisone<br>* Prednisone will be administered at 100 mg orally daily for 5 days every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles. Prednisone at 100 mg orally from Day -7 to Day -1 may be given at the discretion of the treating investigator physician.<br>Drug: Rituximab<br>* Rituximab will be administered at 375 mg/m^2 IV every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles.<br>* Other names: MabThera/Rituxan;|
| Experimental: Polatuzumab Vedotin (2.4mg) + R-CHP<br>Dose Escalation: Participants will receive a total of six to eight 21-day cycles of polatuzumab vedotin in combination with R-CHP. | Drug: Cyclophosphamide<br>* Cyclophosphamide will be administered at 750 milligrams per square meter (mg/m^2) IV every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles.<br>Drug: Doxorubicin<br>* Doxorubicin will be administered at 50 mg/m^2 IV every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles.<br>Drug: Polatuzumab Vedotin<br>* Polatuzumab vedotin will be administered at escalating doses (at a starting dose of 1 mg/kg) IV every 3 weeks, for 6 or 8 cycles.<br>* Other names: DCDS4501A;Drug: Prednisolone<br>* Prednisolone will be administered at 100 mg orally daily for 5 days every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles. Prednisone at 100 mg orally from Day -7 to Day -1 may be given at the discretion of the treating investigator physician.<br>Drug: Prednisone<br>* Prednisone will be administered at 100 mg orally daily for 5 days every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles. Prednisone at 100 mg orally from Day -7 to Day -1 may be given at the discretion of the treating investigator physician.<br>Drug: Rituximab<br>* Rituximab will be administered at 375 mg/m^2 IV every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles.<br>* Other names: MabThera/Rituxan;|
| Experimental: Expansion: Polatuzumab Vedotin (1.8mg) + R-CHP<br>Dose Expansion: Participants will receive a total of six to eight 21-day cycles of polatuzumab vedotin in combination with R-CHP. | Drug: Cyclophosphamide<br>* Cyclophosphamide will be administered at 750 milligrams per square meter (mg/m^2) IV every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles.<br>Drug: Doxorubicin<br>* Doxorubicin will be administered at 50 mg/m^2 IV every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles.<br>Drug: Polatuzumab Vedotin<br>* Polatuzumab vedotin will be administered at escalating doses (at a starting dose of 1 mg/kg) IV every 3 weeks, for 6 or 8 cycles.<br>* Other names: DCDS4501A;Drug: Prednisolone<br>* Prednisolone will be administered at 100 mg orally daily for 5 days every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles. Prednisone at 100 mg orally from Day -7 to Day -1 may be given at the discretion of the treating investigator physician.<br>Drug: Prednisone<br>* Prednisone will be administered at 100 mg orally daily for 5 days every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles. Prednisone at 100 mg orally from Day -7 to Day -1 may be given at the discretion of the treating investigator physician.<br>Drug: Rituximab<br>* Rituximab will be administered at 375 mg/m^2 IV every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles.<br>* Other names: MabThera/Rituxan;|
| Experimental: Expansion: Polatuzumab Vedotin (1.8mg) + G-CHP<br>Dose Expansion: Participants will receive a total of six to eight 21-day cycles of polatuzumab vedotin in combination with G-CHP. | Drug: Cyclophosphamide<br>* Cyclophosphamide will be administered at 750 milligrams per square meter (mg/m^2) IV every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles.<br>Drug: Doxorubicin<br>* Doxorubicin will be administered at 50 mg/m^2 IV every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles.<br>Drug: Obinutuzumab<br>* Obinutuzumab will be administered at 1000 milligrams (mg) IV on Cycle 1 Days 1, 8, and 15 and on Day 1 of Cycles 3-8.<br>* Other names: Gazyva/Gazyvaro;Drug: Polatuzumab Vedotin<br>* Polatuzumab vedotin will be administered at escalating doses (at a starting dose of 1 mg/kg) IV every 3 weeks, for 6 or 8 cycles.<br>* Other names: DCDS4501A;Drug: Prednisolone<br>* Prednisolone will be administered at 100 mg orally daily for 5 days every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles. Prednisone at 100 mg orally from Day -7 to Day -1 may be given at the discretion of the treating investigator physician.<br>Drug: Prednisone<br>* Prednisone will be administered at 100 mg orally daily for 5 days every 3 weeks (starting from Cycle 1 Day 1), for 6 or 8 cycles. Prednisone at 100 mg orally from Day -7 to Day -1 may be given at the discretion of the treating investigator physician.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of Participants With Adverse Events in Diffuse Large B-Cell Lymphoma (DLBCL) Population | An adverse event is any untoward medical occurrence in a participant administered a pharmaceutical product and which does not necessarily have to have a causal relationship with the treatment. An adverse event can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding, for example), symptom, or disease temporally associated with the use of a pharmaceutical product, whether or not considered related to the pharmaceutical product. Preexisting conditions which worsen during a study are also considered as adverse events. AEs were reported based on the national cancer institute common terminology criteria for AEs, Version 4.0 (NCI-CTCAE, v4.0). Reported are the number of subjects with AEs, Grade 3-5 AEs, and Serious Adverse Events (SAEs). | Baseline up to 5 years | 
| Number of Participants With Adverse Events in Non-DLBCL Population | An adverse event is any untoward medical occurrence in a participant administered a pharmaceutical product and which does not necessarily have to have a causal relationship with the treatment. An adverse event can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding, for example), symptom, or disease temporally associated with the use of a pharmaceutical product, whether or not considered related to the pharmaceutical product. Preexisting conditions which worsen during a study are also considered as adverse events. AEs were reported based on the national cancer institute common terminology criteria for AEs, Version 4.0 (NCI-CTCAE, v4.0). Reported are the number of subjects with AEs, Grade 3-5 AEs, and Serious Adverse Events (SAEs). | Baseline up to 5 years | 
| Number of Participants With Dose Limiting Toxicities (DLTs) in DLBCL Population | All dose-escalation cohorts will consist of at least 3 participants. If a DLT is observed in 1 participant at a given dose level during the DLT observation period before dose escalation, additional participants will be enrolled at that dose level for a total of at least 6 participants. DLT assessment forms part of determining the Maximum Tolerated Dose (MTD). The highest dose level resulting in DLTs in less than one-third of a minimum of 6 participants will be declared the MTD. | Cycle (Cy) 1 Day 1 (D1) to Cy 2 D1 (cycle length=21 days) | 
| Number of Participants With DLTs in Non-DLBCL Population | All dose-escalation cohorts will consist of at least 3 participants. If a DLT is observed in 1 participant at a given dose level during the DLT observation period before dose escalation, additional participants will be enrolled at that dose level for a total of at least 6 participants. DLT assessment forms part of determining the Maximum Tolerated Dose (MTD). The highest dose level resulting in DLTs in less than one-third of a minimum of 6 participants will be declared the MTD. | Cycle (Cy) 1 Day 1 (D1) to Cy 2 D1 (cycle length=21 days) | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Percentage of Participants With Objective Response (CR or Partial Response [PR]), as Assessed by Investigator Using Cheson Criteria for DLBCL Population | Complete Response (CR) rate was defined as the percentage of participants with CR at the end of treatment, as assessed by the investigator, with and without FDG-PET. The overall response rate was defined as the percentage of participants with CR or PR at the end of treatment, as assessed by the investigator, with and without FDG-PET. | At the end of treatment (Month 6) | 
| Percentage of Participants With Objective Response (CR or Partial Response [PR]), as Assessed by Investigator Using Cheson Criteria for Non-DLBCL Population | Complete Response (CR) rate was defined as the percentage of participants with CR at the end of treatment, as assessed by the investigator, with and without FDG-PET. The overall response rate was defined as the percentage of participants with CR or PR at the end of treatment, as assessed by the investigator, with and without FDG-PET. | At the end of treatment (Month 6) | 
| Number of Participants With Anti-Polatuzumab Vedotin Antibodies | The Anti-Drug Antibody (ADA) screening assay was optimized to tolerate drug interference and was able to detect 90 and 500 ng/mL of the positive control sample in the presence of 20 μg/mL of polatuzumab vedotin. Polatuzumab vedotin total antibody concentrations were determined for each ADA sample. Out of a total of 186 ADA samples that were measured for polatuzumab vedotin total antibody, 184 samples had levels less than 20 μg/mL. Polatuzumab vedotin total antibody concentrations ranged from <0.050 μg/mL to 52.1 μg/mL with a median concentration of 3.38 μg/mL. | Baseline up to Month 9 (assessed prior to polatuzumab vedotin infusion [0 hour; Hr] on Day 2 [D2] of Cy 1 and 2, D1 of Cy 4, treatment completion/early termination [Month 6], and at 3 months post-treatment [Month 9]; cycle length=21 days) | 
| Number of Participants With Anti-Obinutuzumab Antibodies | The ADA screening assay was optimized to tolerate drug interference and was able to detect 500 ng/mL of the ADA-positive control sample in the presence of 50 micrograms/mL of obinutuzumab. Obinutuzumab concentrations were determined for each ADA sample. Out of a total of 48 ADA samples that were measured for obinutuzumab, 9 samples had levels less than 50 micrograms/mL of obinutuzumab. Obinutuzumab concentrations in ADA samples ranged from 0.282 micrograms/mL to 522 micrograms/mL with a median concentration of 210 micrograms/mL. Therefore, it is possible that samples with obinutuzumab concentrations greater than 50 micrograms/mL might be false negative for ADA. | Baseline up to Month 9 (assessed prior to obinutuzumab infusion [0 Hr] on D1 of Cy 1, 2, 4 and at 3 months post-treatment [Month 9]; cycle length=21 days) | 
| Area Under the Concentration-Time Curve (AUC) of Polatuzumab Vedotin | AUC information for Polatuzumab Vedotin was estimated from serum concentration data using non-compartmental analysis. | Pre-polatuzumab vedotin infusion (Hr 0), 30 minutes (min) post-infusion (infusion time=30-90 min) on D 2 of Cy 1, 2 & D1 of Cy 3, 4; Cy 1 Days 8 & 15; Cy 3 Day 8; at end of treatment (Month 6), at Month 3 follow-up (Month 9) (cycle length=21 days) | 
| Maximum Concentration (Cmax) of Polatuzumab Vedotin | Cmax for Polatuzumab Vedotin was estimated from serum concentration data using non-compartmental analysis. | Pre-polatuzumab vedotin infusion (Hr 0), 30 min post-infusion (infusion time=30-90 min) on D 2 of Cy 1, 2 & D1 of Cy 3, 4; Cy 1 Days 8 & 15; Cy 3 Day 8; at end of treatment (Month 6), at Month 3 follow-up (Month 9) (cycle length=21 days) | 
| Clearance (CL) of Polatuzumab Vedotin | CL for Polatuzumab Vedotin was estimated from serum concentration data using non-compartmental analysis. | Pre-polatuzumab vedotin infusion (Hr 0), 30 min post-infusion (infusion time=30-90 min) on D 2 of Cy 1, 2 & D1 of Cy 3, 4; Cy 1 Days 8 & 15; Cy 3 Day 8; at end of treatment (Month 6), at Month 3 follow-up (Month 9) (cycle length=21 days) | 
| Terminal Half-Life (t1/2) of Polatuzumab Vedotin | t1/2 for Polatuzumab Vedotin was estimated from serum concentration data using non-compartmental analysis. | Pre-polatuzumab vedotin infusion (Hr 0), 30 min post-infusion (infusion time=30-90 min) on D 2 of Cy 1, 2 & D1 of Cy 3, 4; Cy 1 Days 8 & 15; Cy 3 Day 8; at end of treatment (Month 6), at Month 3 follow-up (Month 9) (cycle length=21 days) | 
| Steady-State Volume of Distribution (Vss) of Polatuzumab Vedotin | Vss for Polatuzumab Vedotin was estimated from serum concentration data using non-compartmental analysis. | Pre-polatuzumab vedotin infusion (Hr 0), 30 min post-infusion (infusion time=30-90 min) on D 2 of Cy 1, 2 & D1 of Cy 3, 4; Cy 1 Days 8 & 15; Cy 3 Day 8; at end of treatment (Month 6), at Month 3 follow-up (Month 9) (cycle length=21 days) | 
| Plasma Levels of Cyclophosphamide | Plasma levels of cyclophosphamide will be assessed and compared at the same timepoints of Cycle 1 (in the absence of polatuzumab vedotin) and Cycle 3 (in the presence of polatuzumab vedotin), and compared with historical data to evaluate potential PK interactions with polatuzumab vedotin. | End of cyclophosphamide infusion (infusion time=1-24 Hr), 3 and 23 hours post end of cyclophosphamide infusion on D1 of Cy 1 and 3 (cycle length=21 days) | 
| Plasma Levels of Doxorubicin | Plasma levels of doxorubicin will be assessed and compared at the same timepoints of Cycle 1 (in the absence of polatuzumab vedotin) and Cycle 3 (in the presence of polatuzumab vedotin), and compared with historical data to evaluate potential PK interactions with polatuzumab vedotin. | 2, 24 hours post end of doxorubicin infusion (infusion time=15 min) on D1 of Cy 1 and 3 (cycle length=21 days) | 
| Peripheral Neuropathy Symptom Severity: Therapy-Induced Neuropathy Assessment Scale (TINAS) Overall Neuropathy Severity Score | The TINAS is an 11-item questionnaire scored on a 0 to 10 scale, with 0 being the symptom is not present to 10 being the symptom is as bad as the participant can imagine. The questionnaire will be analyzed for the individual neuropathy symptoms experienced by a participant as well as the calculation of an overall neuropathy severity score. The TINAS scale will be completed daily over the course of study treatment. Additionally, to collect information about the reversibility of peripheral neuropathy, the TINAS will be completed once a week for the first 2 months, then once a month for the next 10 months following treatment completion. Results are only being reported here up until the End of Treatment visit (duration of Study treatment). | Weekly up to Month 6 (22 weeks). TINAS data were collected daily, though for the analysis purpose for each participant, only the first record of each week was selected. | 
| Peripheral Neuropathy Symptom Interference: TINAS Numbness/Tingling Item Score | The TINAS is an 11-item questionnaire scored on a 0 to 10 scale, with 0 being the symptom is not present to 10 being the symptom is as bad as the patient can imagine. The questionnaire will be analyzed for the individual neuropathy symptoms experienced by a participant as well as the calculation of an overall neuropathy severity score. The TINAS scale will be completed daily over the course of study treatment. Additionally, to collect information about the reversibility of peripheral neuropathy, the TINAS will be completed once a week for the first 2 months, then once a month for the next 10 months following treatment completion. Additionally, a single item that asks patients to rate when numbness and tingling was at the worst will be used to predict the onset of peripheral neuropathy. The measure takes less than 5 minutes to complete. Results are only being reported here up until the End of Treatment visit (duration of Study treatment). | Weekly up to Month 6 (22 weeks). TINAS data were collected daily, though for the analysis purpose for each participant, only the first record of each week was selected. | 
| Duration of Response, as Assessed by Investigator Using Cheson Criteria for DLBCL Population | Time from the date of the first occurrence of a documented CR or PR to the date of disease progression, relapse or death from any cause (PFS), as assessed by the investigator for the subgroup of participants with a best overall response of CR or PR. For participants achieving a response who did not experience disease progression, relapse, or died prior to the time of the analysis, the DOR was censored on the date of last disease assessment. | Screening up to disease progression or death, whichever occurs first (up to approximately 2.75 years) | 
| Duration of Response, as Assessed by Investigator Using Cheson Criteria for Non-DLBCL Population | Time from the date of the first occurrence of a documented CR or PR to the date of disease progression, relapse or death from any cause (PFS), as assessed by the investigator for the subgroup of participants with a best overall response of CR or PR. For participants achieving a response who did not experience disease progression, relapse, or died prior to the time of the analysis, the DOR was censored on the date of last disease assessment. | Screening up to disease progression or death, whichever occurs first (up to approximately 2.75 years) | 
| Progression Free Survival, as Assessed by Investigator Using Cheson Criteria for DLBCL Population | Time from date of first dose of study drug (Day 1) to the first occurrence of progression or relapse, or death from any cause while in the study, as assessed by the investigator. If a participant did not experience progressive disease or death, PFS was censored on the day of the last tumor assessment. If a post-baseline assessment was not available, PFS was censored on Day 1. | Screening up to disease progression or death, whichever occurs first (up to approximately 2.75 years) | 
| Progression Free Survival, as Assessed by Investigator Using Cheson Criteria for Non-DLBCL Population | Time from date of first dose of study drug (Day 1) to the first occurrence of progression or relapse, or death from any cause while in the study, as assessed by the investigator. If a participant did not experience progressive disease or death, PFS was censored on the day of the last tumor assessment. If a post-baseline assessment was not available, PFS was censored on Day 1. | Screening up to disease progression or death, whichever occurs first (up to approximately 2.75 years) | 
| Event Free Survival, as Assessed by Investigator Using Cheson Criteria for DLBCL Population | Time from randomization to disease progression or relapse, as assessed by the investigator, death from any cause, or initiation of any new anti-lymphoma therapy (NALT). If the specified event (disease progression or relapse, death, initiation of a NALT) did not occur, EFS was censored at the date of last tumor assessment. For participants without an event who did not have post-baseline tumor assessments, EFS was censored at the time of randomization. | Screening up to disease progression or death, whichever occurs first (up to approximately 2.75 years) | 
| Event Free Survival, as Assessed by Investigator Using Cheson Criteria for Non-DLBCL Population | Time from randomization to disease progression or relapse, as assessed by the investigator, death from any cause, or initiation of any new anti-lymphoma therapy (NALT). If the specified event (disease progression or relapse, death, initiation of a NALT) did not occur, EFS was censored at the date of last tumor assessment. For participants without an event who did not have post-baseline tumor assessments, EFS was censored at the time of randomization. | Screening up to disease progression or death, whichever occurs first (up to approximately 2.75 years) | 
| Relative Dose Intensity of Polatuzumab Vedotin (Ratio of the Amount of Drug Actually Administered to the Amount Planned) for DLBCL Population | Relative dose intensity (DI) was defined as the ratio of the amount of a drug actually administered (actual DI) to the amount planned (planned DI) for a fixed time period, expressed as a percentage. | 6 months | 
| Relative Dose Intensity of Polatuzumab Vedotin (Ratio of the Amount of Drug Actually Administered to the Amount Planned) for Non-DLBCL Population | Relative dose intensity (DI) was defined as the ratio of the amount of a drug actually administered (actual DI) to the amount planned (planned DI) for a fixed time period, expressed as a percentage. | 6 months | 
| Overall Survival for DLBCL Population | The time from the date of randomization to the date of death from any cause. For participants who did not die at the time of the analyses, OS was censored on the last date when the participants were known to be alive. | Screening up to death due to any cause (up to approximately 6 years) | 
| Overall Survival for Non-DLBCL Population | The time from the date of randomization to the date of death from any cause. For participants who did not die at the time of the analyses, OS was censored on the last date when the participants were known to be alive. | Screening up to death due to any cause (up to approximately 6 years) |