{"analyses":[{"ciLowerLimit":"0.65","ciNumSides":"TWO_SIDED","ciPctValue":"95","ciUpperLimit":"0.93","groupDescription":"PFS in all participants of the pembro combo arm was compared to PFS in all participants of the chemo arm to address the first primary hypothesis (superiority to chemo). The hazard ratio (HR) and its 95% confidence interval (CI) were estimated using a stratified Cox regression model with Efron's method of tie handling with treatment as a covariate stratified by investigator's choice of chemotherapy (cisplatin or carboplatin) and PD-L1 status (CPS\\<10 vs. CPS≥10) at baseline.","groupIds":["OG000","OG002"],"nonInferiorityType":"SUPERIORITY","pValue":"0.0033","paramType":"Hazard Ratio (HR)","paramValue":"0.78","statisticalComment":"The treatment difference in PFS was assessed by the stratified log-rank test.","statisticalMethod":"Stratified Log-Rank"}],"classes":[{"categories":[{"measurements":[{"groupId":"OG000","lowerLimit":"7.5","upperLimit":"8.5","value":"8.3"},{"groupId":"OG002","lowerLimit":"6.4","upperLimit":"7.9","value":"7.1"}]}]}],"denoms":[{"counts":[{"groupId":"OG000","value":"351"},{"groupId":"OG001","value":"0"},{"groupId":"OG002","value":"352"}],"units":"Participants"}],"description":"PFS was defined as the time from randomization to the first documented progressive disease (PD) per RECIST 1.1 based on BICR, 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 had to demonstrate an absolute increase of ≥5 mm. The appearance of one or more new lesions was also considered PD. The sponsor allowed a maximum of 10 target lesions in total and 5 per organ on this study.\n\nPer protocol, PFS in the pembro combo arm was compared to the chemo arm as a pre-specified primary analysis of the Intent-To-Treat (ITT) population (all randomized participants). PFS is reported here for all participants in the pembro combo arm and chemo arm. Per protocol, PFS was compared separately between all participants of the pembro arm and chemo arm and is presented later in the record.","dispersionType":"95% Confidence Interval","groups":[{"description":"Participants received pembrolizumab 200 mg IV on Day 1 of each 3-week cycle for a maximum of 35 doses PLUS standard therapy (ST) chemotherapy with EITHER cisplatin 70 mg/m\\^2 IV on Day 1 (or Day 2 if required per local guidelines) of each 3-week cycle plus gemcitabine IV infusion 1,000 mg/m\\^2 on Day 1 and Day 8 of each 3-week cycle, OR carboplatin at an area under the curve 5 (AUC 5) (or AUC 4.5 if required per local guidelines) IV on Day 1 (or Day 2 if required per local guidelines) of each 3-week cycle plus gemcitabine 1,000 mg/m\\^2 IV on Day 1 and Day 8 of each 3-week cycle.","id":"OG000","title":"Pembrolizumab + ST Chemotherapy (Pembro Combo)"},{"description":"Participants received pembrolizumab 200 mg intravenously (IV) on Day 1 of each 3-week cycle for a maximum of 35 doses.","id":"OG001","title":"Pembrolizumab (Pembro)"},{"description":"Participants received ST chemotherapy with EITHER cisplatin 70 mg/m\\^2 IV on Day 1 (or Day 2 if required per local guidelines) of each 3-week cycle plus gemcitabine IV infusion 1,000 mg/m\\^2 on Day 1 and Day 8 of each 3-week cycle OR carboplatin at AUC 5 (or AUC 4.5 if required per local guidelines) IV on Day 1 (or Day 2 if required per local guidelines) of each 3-week cycle plus gemcitabine 1,000 mg/m\\^2 IV on Day 1 and Day 8 of each 3-week cycle.","id":"OG002","title":"ST Chemotherapy (Chemo)"}],"paramType":"MEDIAN","populationDescription":"All participants in the ITT population randomized to the pembro combo arm and chemo arm were included in the analysis. Per protocol, the pembro arm was compared to the chemo arm separately and not included in this analysis.","reportingStatus":"POSTED","timeFrame":"Up to approximately 42 months","title":"Pembro Combo vs Chemo: Progression-free Survival (PFS) Using Response Criteria in Solid Tumors Version 1.1 (RECIST 1.1) as Assessed by Blinded Independent Central Review (BICR)","type":"PRIMARY","unitOfMeasure":"Months"}