{"analyses":[{"ciLowerLimit":"-8.2","ciNumSides":"TWO_SIDED","ciPctValue":"95","ciUpperLimit":"9.1","groupDescription":"ORR in CPS ≥1 participants of the pembro combo arm was compared to ORR in CPS ≥1 participants of the control arm. The comparison was based on Miettinen \\& Nurminen method stratified by ECOG (0 vs. 1), HPV status (Positive vs. Negative) and PD-L1 TPS status (Strongly Positive, Not Strongly Positive).","groupIds":["OG001","OG002"],"nonInferiorityType":"OTHER","pValue":"0.4586","pValueComment":"No formal hypothesis testing performed; nominal p-value provided for treatment comparison.","paramType":"Difference in ORR Percentage","paramValue":"0.5","statisticalMethod":"Miettinen & Nurminen method"}],"classes":[{"categories":[{"measurements":[{"groupId":"OG001","lowerLimit":"30.3","upperLimit":"42.8","value":"36.4"},{"groupId":"OG002","lowerLimit":"29.6","upperLimit":"42.2","value":"35.7"}]}]}],"denoms":[{"counts":[{"groupId":"OG000","value":"0"},{"groupId":"OG001","value":"242"},{"groupId":"OG002","value":"235"}],"units":"Participants"}],"description":"ORR was defined as the percentage of participants in the analysis population who have a CR (disappearance of all target lesions) or a PR (≥30% decrease in the sum of diameters of target lesions) per RECIST 1.1. based upon BICR. Per protocol, ORR in the pembro combo arm was compared to the control arm as a pre-specified secondary analysis of the ITT population. The percentage of participants who experienced CR or PR is reported here as the ORR, for the first course of treatment, for all participants with PD-L1 biomarker positive expression defined by IHC as CPS ≥1 in the pembro combo arm and control arm. Per protocol, ORR was compared separately between CPS ≥1 participants of the pembro mono arm and control arm and is presented later in the record.","dispersionType":"95% Confidence Interval","groups":[{"description":"Participants received pembrolizumab 200 mg intravenously (IV) on Day 1 of each 3-week cycle for up to 35 cycles (up to \\~2 years).","id":"OG000","title":"Pembrolizumab Monotherapy (Pembro Mono)"},{"description":"Participants received pembrolizumab 200 mg IV on Day 1 of each 3-week cycle for up to 35 cycles (up to \\~2 years); plus cisplatin 100 mg/m\\^2 IV or carboplatin at a target area under the curve of 5 (AUC 5) IV, per Investigator's choice, on Day 1 of each 3-week cycle (6 cycle maximum \\[up to \\~4 months\\]); plus 5-Fluorouracil (5-FU) 1000 mg/m\\^2/day IV continuous from Day 1-4 of each 3-week cycle (6 cycle maximum \\[up to \\~4 months\\]).","id":"OG001","title":"Pembrolizumab + Chemotherapy (Pembro Combo)"},{"description":"Participants received cetuximab on Day 1 at a dose of 400 mg/m\\^2 IV, and then 250 mg/m\\^2 IV on Day 1 of each subsequent week until disease progression or unacceptable toxicity; plus cisplatin 100 mg/m\\^2 IV or carboplatin AUC 5 IV (Investigator's choice) on Day 1 of each 3-week cycle (6 cycle maximum \\[up to \\~4 months\\] for platinum-based therapy); plus 5-FU 1000 mg/m\\^2/day IV continuous from Day 1-4 of each 3-week cycle (6 cycle maximum \\[up to \\~4 months\\]).","id":"OG002","title":"Cetuximab + Chemotherapy (Control)"}],"paramType":"NUMBER","populationDescription":"Participants in the ITT population randomized to either pembro combo arm or control arm during active enrollment with CPS ≥1 were analyzed. 20 participants in control arm enrolled during an enrollment pause of the pembro combo arm were excluded. Per protocol, pembro mono arm was compared to control arm separately and not included in this analysis.","reportingStatus":"POSTED","timeFrame":"Up to approximately 47 months","title":"Pembro Combo vs Control: ORR Per RECIST 1.1 by BICR in Participants With PD-L1 CPS ≥1","type":"SECONDARY","unitOfMeasure":"Percentage of Participants"}