{"description":"Same event may appear as both non-SAE and SAE but are distinct events. An event may be categorized as serious in 1 participant and non-serious in another, or a participant may have experienced both SAE and non-SAE. AEs were monitored for safety analysis set. All-cause mortality was monitored for full analysis set","eventGroups":[{"deathsNumAffected":45,"deathsNumAtRisk":313,"description":"Participants were randomized to receive vepdegestrant 200 milligrams (mg) orally, once daily on Days 1 to 28 of each 28-day cycle. 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v27.1","stats":[{"groupId":"EG000","numAffected":0,"numAtRisk":312},{"groupId":"EG001","numAffected":1,"numAtRisk":307}],"term":"Pneumothorax"},{"assessmentType":"NON_SYSTEMATIC_ASSESSMENT","organSystem":"Respiratory, thoracic and mediastinal disorders","sourceVocabulary":"MedDRA v27.1","stats":[{"groupId":"EG000","numAffected":0,"numAtRisk":312},{"groupId":"EG001","numAffected":1,"numAtRisk":307}],"term":"Pulmonary embolism"},{"assessmentType":"NON_SYSTEMATIC_ASSESSMENT","organSystem":"Respiratory, thoracic and mediastinal disorders","sourceVocabulary":"MedDRA v27.1","stats":[{"groupId":"EG000","numAffected":0,"numAtRisk":312},{"groupId":"EG001","numAffected":1,"numAtRisk":307}],"term":"Respiratory failure"}],"timeFrame":"Adverse events: From the first dose of study treatment up to 28 days after last dose of study treatment (up to 19.56 months and 20.38 months for vepdegestrant and fulvestrant arms respectively); All-cause mortality: From randomization until date of death due to any cause (up to 19.56 months and 20.38 months for vepdegestrant and fulvestrant arms respectively)"}