{"analyses":[{"ciLowerLimit":"0.55","ciNumSides":"TWO_SIDED","ciPctValue":"95","ciUpperLimit":"0.76","groupDescription":"PFS in all participants of the pembrolizumab + SOC arm was compared to PFS in all participants of the placebo + SOC arm based on a Cox regression model with Efron's method of tie handling with treatment as a covariate stratified by geographic region (Asia versus Rest of the World), tumor histology (Adenocarcinoma versus Squamous Cell Carcinoma), and ECOG performance status (0 versus 1).","groupIds":["OG000","OG001"],"nonInferiorityType":"SUPERIORITY","pValue":"<0.0001","paramType":"Hazard Ratio (HR)","paramValue":"0.65","statisticalMethod":"Stratified Log-Rank"}],"classes":[{"categories":[{"measurements":[{"groupId":"OG000","lowerLimit":"6.2","upperLimit":"6.9","value":"6.3"},{"groupId":"OG001","lowerLimit":"5.0","upperLimit":"6.0","value":"5.8"}]}]}],"denoms":[{"counts":[{"groupId":"OG000","value":"373"},{"groupId":"OG001","value":"376"}],"units":"Participants"}],"description":"PFS was defined as the time from randomization to the first documented progressive disease (PD) per RECIST 1.1 as assessed by the investigator, 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. Per protocol, PFS is reported here for all participants of the ITT population (all randomized).","dispersionType":"95% Confidence Interval","groups":[{"description":"Participants received pembrolizumab 200 mg IV Q3W plus SOC chemotherapy with cisplatin 80 mg/m\\^2 IV Q3W and 5-FU 800 mg/m\\^2/day continuous IV infusion on Days 1 to 5 (120 hours) Q3W. All treatments were administered on an outpatient basis beginning on Day 1 of each 3-week dosing cycle.","id":"OG000","title":"Pembrolizumab + SOC"},{"description":"Participants received placebo to pembrolizumab (saline) IV Q3W plus SOC chemotherapy with cisplatin 80 mg/m\\^2 IV Q3W and 5-FU 800 mg/m\\^2/day continuous IV infusion on Days 1 to 5 (120 hours) Q3W. All treatments were administered on an outpatient basis beginning on Day 1 of each 3-week dosing cycle.","id":"OG001","title":"Placebo + SOC"}],"paramType":"MEDIAN","populationDescription":"All randomized participants (ITT population) were analyzed.","reportingStatus":"POSTED","timeFrame":"Up to approximately 34 months","title":"PFS Per RECIST 1.1 As Assessed By Investigator in All Participants","type":"PRIMARY","unitOfMeasure":"Months"}