Relapse-Free Survival (RFS) was defined as the time from randomization to disease recurrence or death from any cause. RFS events included loco-regional recurrence, distant metastases, new primary melanoma, and death without prior documented recurrence; such deaths were counted as events and not censored.

Patients without an event at the analysis cut-off (30-Jun-2017) were censored at the date of the last radiological or non-radiological efficacy assessment. Patients lost to follow-up before recurrence or who initiated subsequent anti-cancer therapy prior to recurrence were censored at the last efficacy assessment before loss to follow-up or therapy initiation. Events after prolonged loss to follow-up were handled per the analysis plan.

Malignancies other than new primary melanoma were not considered RFS events and, except for basal cell carcinoma, were reported as serious adverse events. Tumor tissue from any new primary cancer was collected for biomarker analyses.

Intent-to-Treat (ITT) Population

Relapse-Free Survival (RFS) was defined as the time from randomization to disease recurrence or death from any cause. RFS events included loco-regional recurrence, distant metastases, new primary melanoma, and death without prior documented recurrence; such deaths were counted as events and not censored.

Patients without an event at the analysis cut-off (30-Jun-2017) were censored at the date of the last radiological or non-radiological efficacy assessment. Patients lost to follow-up before recurrence or who initiated subsequent anti-cancer therapy prior to recurrence were censored at the last efficacy assessment before loss to follow-up or therapy initiation. Events after prolonged loss to follow-up were handled per the analysis plan.

Malignancies other than new primary melanoma were not considered RFS events and, except for basal cell carcinoma, were reported as serious adverse events. Tumor tissue from any new primary cancer was collected for biomarker analyses.

Intent-to-Treat (ITT) Population

Censoring was performed using the date of last known contact for those who were alive at the time of analysis.

Intent-to-Treat (ITT) Population

Overall Survival (OS) was defined as the interval from randomization to the date of death, irrespective of the cause of death. Censoring was performed using the date of last known contact for those who were alive at the time of analysis.

Intent-to-Treat (ITT) Population

Distant metastasis-free survival (DMFS) was defined as the time from randomization to the first occurrence of distant metastasis or death, whichever occurred first, if death preceded documented recurrence. Patients who remained alive and free of distant metastasis were censored at the date of their last assessment.

Intent-to-Treat (ITT) Population

Distant metastasis-free survival (DMFS) was defined as the time from randomization to the first occurrence of distant metastasis or death, whichever occurred first, if death preceded documented recurrence. Patients who remained alive and free of distant metastasis were censored at the date of their last assessment.

Intent-to-Treat (ITT) Population

The first appearance of local/distant metastasis or mortality due to disease recurrence or toxicity were used as events. Censoring was performed using the date of last assessment for those who were alive without local/distant metastasis or new primary melanoma at the time of analysis. FFR was censored if patients died from causes other than melanoma or treatment-related toxicity at the date of death.

Intent-to-Treat (ITT) Population

Freedom from relapse (FFR) was defined as the interval from randomization to local or distant recurrence with censoring of patients dying from causes other than melanoma or treatment -related toxicity at the date of death. The first appearance of local/distant metastasis or mortality due to disease recurrence or toxicity were used as events. Censoring was performed using the date of last assessment for those who were alive without local/distant metastasis or new primary melanoma at the time of analysis. FFR was censored if patients died from causes other than melanoma or treatment-related toxicity at the date of death.

Intent-to-Treat (ITT) Population

Pre-treatment deaths were collected from day of participant's informed consent to the day before first dose of study medication.

On-treatment deaths were collected from first dose of study treatment to 30 days after last dose of study medication (on-treatment), up to approximately 12 months.

Deaths were collected in the post treatment survival follow up from 31 days after last dose of study medication until the end of the study, up to approximately 126 months.

Intent-to-Treat (ITT) Population