[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100631816":3},{"organization":4,"armGroups":7,"interventions":20,"overallOfficials":26,"centralContacts":31,"locations":37,"responsibleParty":52,"collaborators":26,"id":56,"slug":57,"hasResults":58,"nctId":59,"briefTitle":60,"officialTitle":61,"acronym":26,"eligibilityCriteria":62,"healthyVolunteers":58,"sex":63,"minAge":64,"maxAge":65,"enrollmentInfo":66,"targetDuration":26,"studyType":69,"phases":70,"briefSummary":72,"conditions":73,"keywords":75,"overallStatus":40,"whyStopped":26,"lastUpdateSubmitDate":80,"lastUpdatePostDateStruct":81,"startDateStruct":84,"completionDateStruct":86,"leadSponsor":88,"locationsCount":89},{"fullName":5,"class":6},"Fudan University","OTHER",[8,14],{"label":9,"type":10,"description":11,"interventionNames":12},"Active air purifier group","EXPERIMENTAL","Participants in this group received a home-based air purifier equipped with high-efficiency particulate air (HEPA) and carbon filters.",[13],"Behavioral: Using air purifiers with high-efficiency particulate air (HEPA) and carbon filters",{"label":15,"type":16,"description":17,"interventionNames":18},"Sham air purifier group","SHAM_COMPARATOR","Participants in this group received an air purifier identical in appearance to those used by the active air purifier group, but without the filtration function.",[19],"Behavioral: Using air purifiers with non-functional filtration system",[21,27],{"type":22,"name":23,"description":24,"armGroupLabels":25,"otherNames":26},"BEHAVIORAL","Using air purifiers with high-efficiency particulate air (HEPA) and carbon filters","Participants in the intervention arm will receive active air purifiers, which will be installed in their bedroom and the room where they spend the most time at home. The devices will operate continuously for the entire intervention period.",[9],null,{"type":22,"name":28,"description":29,"armGroupLabels":30,"otherNames":26},"Using air purifiers with non-functional filtration system","Participants in the intervention arm will receive sham air purifiers, which will be installed in their bedroom and the room where they spend the most time at home. The devices will operate continuously for the entire intervention period.",[15],[32],{"name":33,"role":34,"phone":35,"phoneExt":26,"email":36},"Haidong Kan, Ph.D","CONTACT","+86-021-54237908","kanh@fudan.edu.cn",[38],{"facility":39,"status":40,"city":41,"state":26,"zip":26,"country":42,"countryCode":43,"cosmosGeoPoint":44,"geoPoint":49,"contacts":50},"School of Public Health, Fudan University","RECRUITING","Shanghai","China","CN",{"type":45,"coordinates":46},"Point",[47,48],121.45806,31.22222,{"lat":48,"lon":47},[51],{"name":33,"role":34,"phone":35,"phoneExt":26,"email":36},{"type":53,"investigatorFullName":54,"investigatorTitle":55,"investigatorAffiliation":5,"oldNameTitle":26,"oldOrganization":26},"PRINCIPAL_INVESTIGATOR","Haidong Kan","Professor","100631816","air-purifier-use-and-respiratory-health-in-copd-patients-100631816",false,"NCT07505602","Air Purifier Use and Respiratory Health in COPD Patients","Respiratory Benefits of Indoor Air Purification in Patients With Chronic Obstructive Pulmonary Disease: A Randomized Controlled Trial","Inclusion Criteria:\n\n* Age between 50 and 80 years old\n* Physician diagnosis of COPD\n* Living in Shanghai during the intervention period\n* Subjects who have no plans to change homes during the intervention period\n* Non-smokers and former smokers\n\nExclusion Criteria:\n\n* Subjects living in a location other than home\n* Subjects with a history of alcohol abuse\n* Subjects with other chronic lung diseases, such as active tuberculosis, pulmonary fibrosis, cystic fibrosis, or alpha-1 antitrypsin deficiency\n* Subjects with a history of thoracic surgery\n* Subjects with a history of malignant tumors, such as lung cancer, liver cancer, or gastric cancer\n* Subjects with diagnosed chronic hepatic or renal insufficiency, such as liver cirrhosis, chronic viral hepatitis, or autoimmune liver disease\n* Subjects with acute myocardial infarction or unstable arrhythmia diagnosed within the past 6 weeks\n* Subjects currently participating in other interventional studies","ALL","50 Years","80 Years",{"count":67,"type":68},120,"ESTIMATED","INTERVENTIONAL",[71],"NA","This randomized, double-blind, parallel-controlled trial aims to evaluate the effects of an indoor air purifier intervention on respiratory health in patients with Chronic Obstructive Pulmonary Disease (COPD).",[74],"Respiratory Health",[76,77,78,79],"Chronic Obstructive Pulmonary Disease","Air purifier","Randomized controlled trial","Respiratory health","2026-06-05",{"date":82,"type":83},"2026-06-09","ACTUAL",{"date":85,"type":83},"2026-03-30",{"date":87,"type":68},"2027-12",{"name":5,"class":6},1]