Efficacy and Safety Study of Talimogene Laherparepvec Compared to Granulocyte Macrophage Colony Stimulating Factor (GM-CSF) in Melanoma

Durable response rate was defined as the percentage of participants with a complete response (CR) or partial response (PR) maintained continuously for at least 6 months from the time the objective response was first observed and initiating within 12 months of starting therapy as assessed by the Endpoint Assessment Committee (EAC). This reflects all new sites of disease as well as disease sites identified at baseline.

Disease assessments were performed at the beginning of each treatment cycle in accordance with modified World Health Organization criteria.

CR: Disappearance of all clinical evidence of tumor (both measurable and non-measurable but evaluable disease); PR: ≥ 50% reduction in the sum of the products of the perpendicular diameters of all measurable tumors at the time of assessment as compared to baseline.

Overall survival was defined as the time from the date of randomization to the date of death from any cause. Overall survival time was censored at the last date the patient was known to be alive when the confirmation of death was absent or unknown. Participants were censored at the date of randomization if no additional follow-up data were obtained.

Objective response rate was defined as the percentage of participants with a best overall response of complete response (CR) or partial response (PR) assessed by the Endpoint Assessment Committee (EAC). Best overall response for a patient is the best overall response observed across all time points.

Disease assessments were performed at the beginning of each treatment cycle and assessed in accordance with modified World Health Organization criteria.

CR: Disappearance of all clinical evidence of tumor (both measurable and non-measurable but evaluable disease); PR: ≥ 50% reduction in the sum of the products of the perpendicular diameters of all measurable tumors at the time of assessment as compared to baseline.

The duration of response is defined as the longest individual period from entering response (CR or PR as assessed by the EAC) to the first documented evidence of the patient no longer meeting the criteria for being in response or death, whichever is earlier. Responses were censored at the last assessment showing response.

Response onset is defined as the time from the date of randomization to the date of the first documented evidence of response (CR or PR) per EAC assessment.

Time to treatment failure was assessed by the investigator, and calculated from randomization until the first clinically relevant disease progression where there is no response achieved after the progression, or until death if no such progression occurs. Participants who did not have clinically relevant progression or did not die were censored at the time of the their last tumor assessment. Participants who withdrew from treatment due to a clinically unacceptable toxicity were not considered as an event in the analysis.

Progressive disease (PD) is defined as a ≥ 25% increase in the sum of the products of the perpendicular diameters of all measurable tumors since baseline, or the unequivocal appearance of a new tumor since the last response assessment time point.

Clinically relevant progressive disease is PD that is associated with a decline in performance status and/or in the opinion of the investigator the patient requires alternative therapy.

Response interval is defined as the interval between the date of randomization and the date of the last documented evidence of response (CR or PR as assessed by the Investigator) prior to any new anti-cancer therapy. Response Interval post response onset was censored if a patient was still in response at the last observation.