ORR According to Immune-related Response Criteria (irRC) as Assessed by Investigator in Melanoma Participants (Parts B Plus D)
ORR was defined as the percentage of participants in the analysis population who had a confirmed immune-related Complete Response (irCR: complete disappearance of all tumor lesions whether measurable or not, and no new lesions) or immune-related Partial Response (irPR: decrease in sum of the products of the two largest perpendicular diameters (SPD) of ≥50% by a consecutive assessment ≥4 weeks after first documentation) according to irRC. The percentage of participants who experienced a confirmed irCR or irPR according to irRC as assessed by the investigator was reported as the ORR for each melanoma dose arm (Parts B plus D).
ORR According to irRC as Assessed by Investigator in NSCLC Participants (Parts C Plus F)
ORR was defined as the percentage of participants in the analysis population who had a confirmed irCR (complete disappearance of all tumor lesions whether measurable or not, and no new lesions) or irPR (decrease in sum of the products of the two largest perpendicular diameters (SPD) of ≥50% by a consecutive assessment ≥4 weeks after first documentation) according to irRC. The percentage of participants who experienced a confirmed irCR or irPR according to irRC as assessed by the investigator was reported as the ORR for each NSCLC dose arm (Parts C plus F).
Area Under the Concentration-Time Curve of Pembrolizumab From Time 0 to Day 28 (AUC 0-28) in Solid Tumor Participants (Parts A and A1)
Blood samples were collected at specified intervals for the determination of AUC0-28. AUC0-28 was defined as the area under the concentration-time curve of pembrolizumab from time zero to Day 28. AUC0-28 was based on noncompartmental analysis and reported for participants in Parts A and A1.
Area Under the Concentration-Time Curve of Pembrolizumab From Time 0 to Infinity (AUC 0-inf) in Solid Tumor Participants (Parts A and A1)
Blood samples were collected at specified intervals for the determination of AUC0-inf. AUC0-inf was defined as the area under the concentration-time curve of pembrolizumab from time zero to infinity. AUC0-inf was based on noncompartmental analysis and reported for participants in Parts A and A1.
Maximum Concentration (Cmax) of Pembrolizumab in Solid Tumor Participants (Parts A and A1)
Blood samples were collected at specified intervals for the determination of Cmax. Cmax was defined as the maximum concentration of pembrolizumab reached. Cmax was based on noncompartmental analysis and reported for participants in Parts A and A1.
Time to Maximum Concentration (Tmax) of Pembrolizumab in Solid Tumor Participants (Parts A and A1)
Blood samples were collected at specified intervals for the determination of Tmax. Tmax was defined as time to the maximum concentration of pembrolizumab reached. Tmax was based on noncompartmental analysis and reported for participants in Parts A and A1.
Terminal Half-Life (t ½) of Pembrolizumab in Solid Tumor Participants (Parts A and A1)
Blood samples were collected at specified intervals for the determination of t½. t½ was defined as the time required to divide the pembrolizumab plasma concentration by two after reaching pseudo-equilibrium, following a single dose of pembrolizumab. t½ was based on noncompartmental analysis and reported for participants in Parts A and A1.
Area Under the Concentration-Time Curve of Pembrolizumab From Time 0 to Day 21 (AUC 0-21) in Solid Tumor Participants (Part A2)
Blood samples were collected at specified intervals for the determination of AUC0-21. AUC0-21 was defined as the area under the concentration-time curve of pembrolizumab from time zero to Study Day 21. AUC0-21 was based on noncompartmental analysis and reported for participants in Part A2.
Area Under the Concentration-Time Curve of Pembrolizumab From Day 21 to Day 42 (AUC21-42) in Solid Tumor Participants (Part A2)
Blood samples were collected at specified intervals for the determination of AUC21-42. AUC21-42 was defined as the area under the concentration-time curve of pembrolizumab from Study Day 21 (end of Cycle 1) through Study Day 42 (end of Cycle 2). AUC21-42 was based on noncompartmental analysis and reported for participants in Part A2.
Lowest Plasma Concentration (Ctrough) of Pembrolizumab in Solid Tumor Participants (Parts A, A1, and A2)
Pre-dose samples were collected 24 hours before infusion of pembrolizumab at specified intervals for the determination of Ctrough. Ctrough was defined as the lowest concentration of pembrolizumab reached before the next dose was administered. Ctrough was reported for each Part A arm according to cycle and nominal time after first dose (Day). Results for each cycle reported for arms with N>1 at that timepoint. Ctrough data for melanoma (Parts B and D) and NSCLC (Parts C and F) participants are presented separately and are not included here.
Ctrough of Pembrolizumab in Melanoma Participants (Parts B and D)
Pre-dose samples were collected 24 hours before infusion of pembrolizumab at specified intervals for the determination of Ctrough. Ctrough was defined as the lowest concentration of pembrolizumab reached before the next dose was administered. For the purposes of the Ctrough analysis, samples were collected and analyzed separately for each Part B and D enrolment cohort, and Ctrough was reported for each cohort according to cycle and nominal time after first dose (Day). Results for each cycle reported for arms with N>1 at that timepoint. Ctrough data for solid tumor (Part A) and NSCLC (Parts C and F) participants are presented separately and are not included here.
Ctrough of Pembrolizumab in NSCLC Participants (Parts C and F)
Pre-dose samples were collected 24 hours before infusion of pembrolizumab at specified intervals for the determination of Ctrough. Ctrough was defined as the lowest concentration reached by pembrolizumab before the next dose was administered. For the purposes of the Ctrough analysis, samples were collected and analyzed separately for each Part C and F enrolment cohort, and Ctrough was reported for each cohort according to cycle and nominal time after first dose (Day). Results for each cycle reported for arms with N>1 at that timepoint. Ctrough data for solid tumor (Part A) and melanoma (Parts B and D) participants are presented separately and are not included here.
Maximum Change From Baseline (CFB) in Tumor Size Assessed by IRC Per RECIST 1.1 According to Programmed Death-Ligand 1 (PD-L1) Immunohistochemical (IHC) Expression Status in Ipilimumab (Ipi)-Exposed and Ipi-Naive Melanoma Participants (Parts B Plus D)
The percent change from baseline in tumor size based on IRC per RECIST 1.1 was reported according to PD-L1 status in Ipi-Exposed and Ipi-Naïve melanoma participants. Tumor PD-L1 status was measured by the tumor proportion score (TPS), which was the percentage of tumor cells identified using IHC analysis that expressed PD-L1. Tumors with ≥1% positive staining for PD-L1 were considered positive. Maximum tumor change was defined as the percent change of the participant's smallest post-baseline tumor size from the baseline. The number of participants in a percent change from baseline range was reported categorically according to PD-L1 status (PD-L1-Positive, PD-L1 Negative, PD-L1 Status Unknown). Negative percent change from baseline values indicate tumor size reduction, with the greatest reduction possible indicated as "≤ -30%". As specified by the protocol, this analysis of melanoma participants was performed according to ipilimumab exposure (Ipi-Exposed and Ipi-Naïve).
Maximum Change From Baseline (CFB) in Tumor Size Assessed by IRC Per RECIST 1.1 According to PD-L1 IHC Expression Status in Prior Treatment (TRT)-Naïve and Previously-Treated NSCLC Participants (Parts C Plus F)
Percent CFB in tumor size based on IRC per RECIST 1.1 was reported according to PD-L1 status in prior treatment-naïve and previously-treated NSCLC participants. Tumor PD-L1 status was measured by TPS, which was the percentage of tumor cells identified using IHC analysis that expressed PD-L1, as follows: TPS ≥50% =tumor strongly positive, TPS of 1%-49% =tumor weakly positive, TPS <1% =tumor considered negative, or TPS unknown. Maximum tumor change for a participant was defined as the percent change of the participant's smallest post-baseline tumor size from baseline. The number of participants in a percent CFB range was reported categorically according to PD-L1 status (TPS ≥50%, TPS = 1-49%, TPS <1%, TPS Unknown). Negative percent CFB values indicate tumor size reduction, with the greatest reduction possible indicated as "≤ -30%". As specified by the protocol, analysis of NSCLC participants was performed according to prior treatment exposure (Treatment Naive and Previously Treated).
Disease Control Rate (DCR) According to RECIST 1.1 as Assessed by IRO in Melanoma Participants (Parts B and D)
DCR was defined as the percentage of participants who had a CR (disappearance of all target lesions), PR (at least a 30% decrease in the sum of diameters of target lesions), or Stable Disease (SD: neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for progressive disease [PD: at least a 20% increase in the sum of diameters of target lesions and an absolute increase of at least 5 mm. The appearance of one or more new lesions was also considered PD]). The percentage of participants who experienced a confirmed CR, PR, or SD according to RECIST 1.1 as assessed by IRO was reported as the DCR for each melanoma dose arm (Parts B plus D).
Duration of Response (DOR) According to RECIST 1.1 as Assessed by IRO in Melanoma Participants (Parts B and D)
For participants who demonstrated a confirmed CR (disappearance of all target lesions) or PR (At least a 30% decrease in the sum of diameters of target lesions) per RECIST 1.1, DOR was defined as the time from first documented evidence of a CR or PR until progressive disease (PD) or death. DOR for participants who had not progressed or died at the time of analysis was censored at the date of their last tumor assessment. Per RECIST 1.1, PD was defined as at least a 20% increase in the sum of diameters of target lesions. In addition to the relative increase of 20%, the sum must also have demonstrated an absolute increase of at least 5 mm. The appearance of one or more new lesions was also considered PD. DOR assessments were based on IRO with confirmation. The DOR according to RECIST 1.1 for all participants who experienced a confirmed CR or PR was reported for each melanoma dose arm (Parts B plus D).
Progression Free Survival (PFS) According to RECIST 1.1 as Assessed by IRO in Melanoma Participants (Parts B Plus D)
PFS was defined as the time from randomization to the first documented PD or death due to any cause, whichever occurred first. Per RECIST 1.1, PD was defined as ≥20% increase in the sum of diameters of target lesions. In addition to the relative increase of 20%, the sum must also have demonstrated an absolute increase of ≥5 mm. The appearance of one or more new lesions was also considered PD. PFS according to RECIST 1.1 as assessed by IRO was reported for each melanoma dose arm (Parts B plus D).
Overall Survival (OS) in Melanoma Participants (Parts B Plus D)
OS was defined as the time from randomization to death due to any cause. Participants without documented death at the time of the final analysis were to be censored at the date of the last follow-up. OS was reported for each melanoma dose arm (Parts B plus D).
DCR According to irRC as Assessed by Investigator in Melanoma Participants (Parts B Plus D)
DCR according to irRC was defined as the percentage of participants who had a irCR (complete disappearance of all tumor lesions whether measurable or not, and no new lesions), irPR (decrease in SPD of ≥50% by a consecutive assessment ≥4 weeks after first documentation), or SD (neither sufficient shrinkage to qualify for irPR nor sufficient increase to qualify for PD [at least a 25% increase in SPD relative to nadir (minimum recorded tumor burden) with confirmation by a repeat, consecutive assessment no less than 4 weeks from the data first documented]). The percentage of participants who experienced a confirmed CR, PR, or SD according to irRC as assessed by the investigator was reported as the DCR for each melanoma dose arm (Parts B plus D).
DOR According to irRC as Assessed by Investigator in Melanoma Participants (Parts B Plus D)
For participants who demonstrated a confirmed irCR (complete disappearance of all tumor lesions whether measurable or not, and no new lesions) or irPR (decrease in SPD of ≥50% by a consecutive assessment ≥4 weeks after first documentation) according to irRC, DOR was defined as the time from first documented evidence of an irCR or irPR until PD or death. DOR for participants who had not progressed or died at the time of analysis was censored at the date of their last tumor assessment. According to irRC, PD was defined as at least a 25% increase in SPD relative to nadir (minimum recorded tumor burden) with confirmation by a repeat, consecutive assessment no less than 4 weeks from the data first documented. The DOR according to irRC as assessed by the investigator for all participants who experienced a confirmed irCR or irPR was reported for each melanoma dose arm (Parts B plus D).
PFS According to irRC as Assessed by Investigator in Melanoma Participants (Parts B Plus D)
PFS was defined as the time from randomization to the first documented PD or death due to any cause, whichever occurred first. According to irRC, PD was defined as at least a 25% increase in SPD relative to nadir (minimum recorded tumor burden) with confirmation by a repeat, consecutive assessment no less than 4 weeks from the data first documented. PFS according to irRC as assessed by the investigator was reported for each melanoma dose arm (Parts B plus D).
DCR According to RECIST 1.1 as Assessed by IRC in NSCLC Participants (Parts C Plus F)
DCR was defined as the percentage of participants who had a CR (disappearance of all target lesions), PR (at least a 30% decrease in the sum of diameters of target lesions), or SD (neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for progressive disease [PD: at least a 20% increase in the sum of diameters of target lesions and an absolute increase of at least 5 mm. The appearance of one or more new lesions was also considered PD]). The percentage of participants who experienced a confirmed CR, PR, or SD according to RECIST 1.1 as assessed by IRC was reported as the DCR for each NSCLC dose arm (Parts C plus F).
DOR According to RECIST 1.1 as Assessed by IRC in NSCLC Participants (Parts C Plus F)
For participants who demonstrated a confirmed CR (disappearance of all target lesions) or PR (at least a 30% decrease in the sum of diameters of target lesions) per RECIST 1.1, DOR was defined as the time from first documented evidence of a CR or PR until PD or death. DOR for participants who had not progressed or died at the time of analysis was censored at the date of their last tumor assessment. Per RECIST 1.1, PD was defined as at least a 20% increase in the sum of diameters of target lesions. In addition to the relative increase of 20%, the sum must also have demonstrated an absolute increase of at least 5 mm. The appearance of one or more new lesions was also considered PD. DOR assessments were based on IRC with confirmation. The DOR according to RECIST 1.1 for all participants who experienced a confirmed CR or PR was reported for each NSCLC dose arm (Parts C plus F).
PFS According to RECIST 1.1 as Assessed by IRC in NSCLC Participants (Parts C Plus F)
PFS was defined as the time from randomization to the first documented PD or death due to any cause, whichever occurred first. Per RECIST 1.1, PD was defined as ≥20% increase in the sum of diameters of target lesions. In addition to the relative increase of 20%, the sum must also have demonstrated an absolute increase of ≥5 mm. The appearance of one or more new lesions was also considered PD. PFS according to RECIST 1.1 as assessed by IRC was reported for each NSCLC dose arm (Parts C plus F).
OS in NSCLC Participants (Parts C Plus F)
OS was defined as the time from randomization to death due to any cause. Participants without documented death at the time of the final analysis were to be censored at the date of the last follow-up. OS was reported for each NSCLC dose arm (Parts C plus F).
DCR According to irRC as Assessed by Investigator in NSCLC Participants (Parts C Plus F)
DCR according to irRC was defined as the percentage of participants who had a irCR (complete disappearance of all tumor lesions whether measurable or not, and no new lesions), irPR (decrease in SPD of ≥50% by a consecutive assessment ≥4 weeks after first documentation), or SD (neither sufficient shrinkage to qualify for irPR nor sufficient increase to qualify for PD [at least a 25% increase in SPD relative to nadir (minimum recorded tumor burden) with confirmation by a repeat, consecutive assessment no less than 4 weeks from the data first documented]). The percentage of participants who experienced a confirmed CR, PR, or SD according to irRC as assessed by the investigator was reported as the DCR for each NSCLC dose arm (Parts C plus F).
DOR According to irRC as Assessed by Investigator in NSCLC Participants (Parts C Plus F)
For participants who demonstrated a confirmed irCR (complete disappearance of all tumor lesions whether measurable or not, and no new lesions) or irPR (decrease in SPD of ≥50% by a consecutive assessment ≥4 weeks after first documentation) according to irRC, DOR was defined as the time from first documented evidence of an irCR or irPR until PD or death. DOR for participants who had not progressed or died at the time of analysis was censored at the date of their last tumor assessment. According to irRC, PD was defined as at least a 25% increase in SPD relative to nadir (minimum recorded tumor burden) with confirmation by a repeat, consecutive assessment no less than 4 weeks from the data first documented. The DOR according to irRC as assessed by the investigator for all participants who experienced a confirmed irCR or irPR was reported for each NSCLC dose arm (Parts C plus F).
PFS According to irRC as Assessed by Investigator in NSCLC Participants (Parts C Plus F)
PFS was defined as the time from randomization to the first documented PD or death due to any cause, whichever occurred first. According to irRC, PD was defined as at least a 25% increase in SPD relative to nadir (minimum recorded tumor burden) with confirmation by a repeat, consecutive assessment no less than 4 weeks from the data first documented. PFS according to irRC as assessed by the investigator was reported for each NSCLC dose arm (Parts C plus F).