[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100607404":3},{"organization":4,"armGroups":7,"interventions":18,"overallOfficials":10,"centralContacts":23,"locations":29,"responsibleParty":44,"collaborators":10,"id":46,"slug":10,"hasResults":47,"nctId":48,"briefTitle":49,"officialTitle":50,"acronym":10,"eligibilityCriteria":51,"healthyVolunteers":47,"sex":52,"minAge":53,"maxAge":54,"enrollmentInfo":55,"targetDuration":10,"studyType":58,"phases":10,"briefSummary":59,"conditions":60,"keywords":63,"overallStatus":67,"whyStopped":10,"lastUpdateSubmitDate":68,"lastUpdatePostDateStruct":69,"startDateStruct":72,"completionDateStruct":74,"leadSponsor":76,"locationsCount":77},{"fullName":5,"class":6},"Zhejiang Hospital","OTHER",[8,14],{"label":9,"type":10,"description":11,"interventionNames":12},"Without COVID-19",null,"No COVID-19 infection",[13],"Other: COVID-19",{"label":15,"type":10,"description":16,"interventionNames":17},"With COVID-19","With COVID-19 infection",[13],[19],{"type":6,"name":20,"description":21,"armGroupLabels":22,"otherNames":10},"COVID-19","The COVID-19 infection situation was used as an intervention measure, and the cohort was divided into groups.",[15,9],[24],{"name":25,"role":26,"phone":27,"phoneExt":10,"email":28},"Pengyuan Liu","CONTACT","18368846455","oncologyliupengyuan@outlook.com",[30],{"facility":31,"status":10,"city":32,"state":33,"zip":34,"country":35,"cosmosGeoPoint":36,"geoPoint":41,"contacts":42},"Zhejiang Hospital, Department of Oncology, Hangzhou, China, 310030","Hangzhou","Zhejiang","310030","China",{"type":37,"coordinates":38},"Point",[39,40],120.16142,30.29365,{"lat":40,"lon":39},[43],{"name":25,"role":26,"phone":27,"phoneExt":10,"email":28},{"type":45,"investigatorFullName":10,"investigatorTitle":10,"investigatorAffiliation":10,"oldNameTitle":10,"oldOrganization":10},"SPONSOR","100607404",false,"NCT07188116","Correlation Between COVID-19 and Radiation Pneumonitis in Breast Cancer","Correlation Between COVID-19 and Radiation Pneumonitis in Breast Cancer: A Historical Cohort Study","Inclusion Criteria:\n\n1. patients with pathologically or cytologically confirmed primary breast cancer,\n2. aged 18 years or older but younger than 80 years,\n3. with complete and reliable medical records,\n4. for those with COVID-19 infection, documented evidence of a positive test result.\n\nExclusion Criteria:\n\n1. concomitant pulmonary malignancies,\n2. a history of prior thoracic radiotherapy,\n3. concurrent pulmonary infections other than COVID-19 during radiotherapy,\n4. missing key data with loss to follow-up,\n5. or any other condition considered unsuitable for enrollment by the investigators.","FEMALE","18 Years","80 Years",{"count":56,"type":57},200,"ESTIMATED","OBSERVATIONAL","This study was designed as a single-center retrospective analysis aimed at investigating whether COVID-19 infection increases the risk or burden of radiation-induced pneumonitis in breast cancer patients.",[61,62,20],"Breast Cancer","Radiation Pneumonia",[64,20,65,66,61],"Retrospective Analysis","Radiation Pneumonitis","Propensity Score Matching","NOT_YET_RECRUITING","2025-09-22",{"date":70,"type":71},"2025-09-23","ACTUAL",{"date":73,"type":57},"2025-09-15",{"date":75,"type":57},"2025-12-31",{"name":5,"class":6},1]