Study of Pembrolizumab (MK-3475) in Participants With Advanced Non-small Cell Lung Cancer (MK-3475-025/KEYNOTE-025)

PFS was defined as the time from the first day of study treatment to the first documented disease progression per RECIST 1.1 based on blinded independent central radiologists' review or death due to any cause, whichever occurred first. Using RECIST 1.1, progressive disease was defined as either a 20% relative increase in the sum of diameters of target lesions, taking as reference the smallest sum on study OR an absolute increase of >5 mm in the sum of lesions, OR the appearance of new lesions. PFS was analyzed using the Kaplan-Meier method and is reported in months. The median PFS for all strongly PD-L1 positive participants is presented.

DOR was measured from the time measurement criteria were first met for CR/PR (whichever was first recorded) until the first date that recurrent or progressive disease was objectively documented (taking as reference for progressive disease the smallest measurements recorded on study). DOR was censored at the last tumor assessment date if a responder did not have PD or death. Non-responders were not included in the analysis. The lower and upper limits were estimated at the time of data cutoff. DOR was analyzed using the Kaplan-Meier method and is reported in days. The median DOR for all strongly PD-L1 positive participants with a confirmed response is presented.

OS was defined as the time from the first day of study treatment to death due to any cause. OS is reported for all strongly PD-L1 positive participants in months

ORR per irRC was defined as the percentage of participants in the analysis population who had a Complete Response (irCR: Complete disappearance of all tumor lesions [whether measureable or not, and no new lesions; irCR must be confirmed by repeated, consecutive assessments made no less than 4 weeks from the date first documented]) or Partial Response (irPR: Decrease in sum of the products of the two largest perpendicular diameters [SPD] of 50% or greater by a consecutive assessment at least 4 weeks after first documentation). The percentage of strongly PD-L1 positive participants who experienced an irCR or irPR is presented.

PFS was defined as the time from the first day of study treatment to the first documented disease progression per irRC or death due to any cause, whichever occurred first. Using irRC, progressive disease was defined as at least a 25% increase in SPD relative to minimum recorded tumor burden. Confirmation by a repeat, consecutive assessment no less than 4 weeks from the data first documented was required. Median PFS was analyzed using the Kaplan-Meier method and is presented in months for all strongly PD-L1 positive participants.

DOR was measured from the time measurement criteria were first met for irCR/irPR (whichever was first recorded) until the first date that recurrent or progressive disease (PD) was objectively documented (taking as reference for progressive disease the smallest measurements recorded on study). PD was defined as at least a 25% increase in SPD relative to minimum recorded tumor burden. Confirmation by a repeat, consecutive assessment no less than 4 weeks from the data first documented was required. DOR was censored at the last tumor assessment date if a responder did not have PD or death. Non-responders were not included in the analysis. DOR was analyzed using the Kaplan-Meier method, is reported in days and is presented for all strongly PD-L1 positive participants who experienced an irCR or irPR.

On-study imaging was to be performed every 9 weeks after the first dose of study drug, or more frequently if clinically indicated. ORR was defined as the percentage of participants in the analysis population who had a CR (disappearance of all target lesions) or PR (at least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters). The percentage of PD-L1 positive participants who experienced a CR or PR is presented.

PFS was defined as the time from the first day of study treatment to the first documented disease progression per RECIST 1.1 based on blinded independent central radiologists' review or death due to any cause, whichever occurred first. Using RECIST 1.1, progressive disease was defined as either a 20% relative increase in the sum of diameters of target lesions, taking as reference the smallest sum on study OR an absolute increase of >5 mm in the sum of lesions, OR the appearance of new lesions. PFS was analyzed using the Kaplan-Meier method and is reported in months. The median PFS for all PD-L1 positive participants is presented.

DOR was measured from the time measurement criteria were first met for CR/PR (whichever was first recorded) until the first date that recurrent or progressive disease was objectively documented (taking as reference for progressive disease the smallest measurements recorded on study). DOR was censored at the last tumor assessment date if a responder did not have PD or death. Non-responders were not included in the analysis. The lower and upper limits were estimated at the time of data cutoff. DOR was analyzed using the Kaplan-Meier method and is reported in days. The median DOR for all PD-L1 positive participants with a confirmed response is presented.

OS was defined as the time from the first day of study treatment to death due to any cause. OS is reported for all PD-L1 positive participants in months.

ORR per irRC was defined as the percentage of participants in the analysis population who had a irCR (Complete disappearance of all tumor lesions [whether measureable or not, and no new lesions; irCR must be confirmed by repeated, consecutive assessments made no less than 4 weeks from the date first documented]) or irPR (Decrease in sum of the products of the two largest perpendicular diameters [SPD] of 50% or greater by a consecutive assessment at least 4 weeks after first documentation). The percentage of PD-L1 positive participants who experienced an irCR or irPR is presented.

PFS was defined as the time from the first day of study treatment to the first documented disease progression per irRC or death due to any cause, whichever occurred first. Using irRC, progressive disease was defined as at least a 25% increase in SPD relative to minimum recorded tumor burden. Confirmation by a repeat, consecutive assessment no less than 4 weeks from the data first documented was required. Median PFS was analyzed using the Kaplan-Meier method and is presented in months for all PD-L1 positive participants.

DOR was measured from the time measurement criteria were first met for irCR/irPR (whichever was first recorded) until the first date that recurrent or progressive disease (PD) was objectively documented (taking as reference for progressive disease the smallest measurements recorded on study). PD was defined as at least a 25% increase in SPD relative to minimum recorded tumor burden. Confirmation by a repeat, consecutive assessment no less than 4 weeks from the data first documented was required. DOR was censored at the last tumor assessment date if a responder did not have PD or death. Non-responders were not included in the analysis. DOR was analyzed using the Kaplan-Meier method, is reported in days and is presented for all PD-L1 positive participants who experienced an irCR or irPR.