A Frontline Therapy Trial in Participants With Advanced Classical Hodgkin Lymphoma

mPFS was defined as the time from the date of randomization to the date of the first of documentation of progressive disease (PD), death due to any cause, or for participants who were confirmed non complete responders per IRF, receipt of subsequent anticancer therapy for Hodgkin lymphoma (HL) after completion of frontline therapy. PD was defined as any new lesion or increase by greater than or equal to (>=) 50 percent (%) of previously involved sites from nadir. Frontline therapy is the part of standard set of treatments.

OS was defined as the time from the date of randomization to the date of death. Participants without documented death at the time of analysis were censored at the date last known to be alive.

CR rate at the end of randomized regimen per investigator was defined as the percentage of participants who achieved CR at the end of treatment with randomized regimen (ABVD or A+AVD) as determined by IRF. CR was defined as disappearance of all evidence of disease.

EFS was defined as the time from randomization until any cause of treatment failure: PD, premature discontinuation of randomized treatment for any reason, or death due to any cause, whichever occurs first. PD was defined as any new lesion or increase by >=50% of previously involved sites from nadir per IRF.

DFS per IRF was defined as the time from CR to disease progression as determined by an IRF or to death from lymphoma or acute toxicity from treatment. CR was defined as disappearance of all evidence of disease.

ORR per IRF was defined as the percentage of participants who achieved CR or partial remission (PR) at the end of treatment with randomized regimen (ABVD or A+AVD) as determined by an IRF. CR was defined as disappearance of all evidence of disease. PR was defined as regression of measurable disease and no new sites.

DOR per IRF in participants with response was the time between first documentation of response (PR or CR) and PD as determined by an IRF. PD was defined as any new lesion or increase by >=50% of previously involved sites from nadir. CR was defined as disappearance of all evidence of disease. PR was defined as regression of measurable disease and no new sites.

DOCR per IRF in participants with CR was the time between first documentation of CR and PD as determined by an IRF. PD was defined as any new lesion or increase by >=50% of previously involved sites from nadir. CR was defined as disappearance of all evidence of disease.

CR was defined as disappearance of all evidence of disease as determined by an IRF.

CR rate at the end of frontline therapy per IRF was defined as the percentage of participants who achieved CR at the end of frontline therapy that is after completion of either randomized regimen or alternate frontline therapy as determined by an IRF. CR was defined as disappearance of all evidence of disease.

PET negativity rate at Cycle 2 was defined as the percentage of participants with negative Cycle 2 PET results defined as Deauville score less than or equal to (<=) 3 at Cycle 2. The Deauville score according to IRF assessment of response was used to evaluate the results of PET scans.

The nATA positive was defined as positive ATA with neutralizing activity at any postbaseline visit.

EORTC QLQ-C30 included 30 items across 5 functional scales (physical, role, cognitive, emotional, and social), 9 symptom scales (fatigue, nausea and vomiting, pain, dyspnea, insomnia, appetite loss, constipation, diarrhea, and financial difficulties) and global health status/QOL scale. It has 28 questions (4-point scale where 1=not at all [best] to 4=Very Much [worst]) and 2 questions (7-point scale where 1=very poor [worst] to 7= excellent [best]). Raw scores were converted into scale scores from 0 to 100. For functional scales and global health status/QOL scale, higher scores show better QOL; for symptom scales, lower scores show better QOL. mPFS was time from date of randomization to date of first of documentation of PD, death due to any cause, or for participants who were confirmed non complete responders per IRF, receipt of subsequent anticancer therapy for HL after completion of frontline therapy. PD is any new lesion or increase by >=50% of previously involved sites from nadir.