[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100543170":3},{"organization":4,"armGroups":7,"interventions":10,"overallOfficials":18,"centralContacts":23,"locations":10,"responsibleParty":29,"collaborators":10,"id":32,"slug":33,"hasResults":34,"nctId":35,"briefTitle":36,"officialTitle":37,"acronym":10,"eligibilityCriteria":38,"healthyVolunteers":34,"sex":39,"minAge":40,"maxAge":41,"enrollmentInfo":42,"targetDuration":45,"studyType":46,"phases":10,"briefSummary":47,"conditions":48,"keywords":10,"overallStatus":51,"whyStopped":10,"lastUpdateSubmitDate":52,"lastUpdatePostDateStruct":53,"startDateStruct":56,"completionDateStruct":58,"leadSponsor":60,"locationsCount":10},{"fullName":5,"class":6},"Shanghai Jiao Tong University School of Medicine","OTHER",[8,12,14,16],{"label":9,"type":10,"description":11,"interventionNames":10},"Children aged 4 -6",null,"This is a non intervention-observation only study.",{"label":13,"type":10,"description":11,"interventionNames":10},"Children aged 9 -11",{"label":15,"type":10,"description":11,"interventionNames":10},"Students aged 13 -15",{"label":17,"type":10,"description":11,"interventionNames":10},"Students aged 17-20",[19],{"name":20,"affiliation":21,"role":22},"Bing Fang, PhD","Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University","PRINCIPAL_INVESTIGATOR",[24],{"name":25,"role":26,"phone":27,"phoneExt":10,"email":28},"Chao Liu, PhD","CONTACT","19821231579","120116@sh9hospital.org.cn",{"type":22,"investigatorFullName":30,"investigatorTitle":31,"investigatorAffiliation":5,"oldNameTitle":10,"oldOrganization":10},"Bing Fang","Professor","100543170","epidemiological-investigation-of-malocclusion-in-china-100543170",false,"NCT06352385","Epidemiological Investigation of Malocclusion in China","A Comprehensive Epidemiological Investigation of Malocclusion in China","Inclusion Criteria:\n\n1. Individuals with all genders;\n2. Individuals with good general health;\n3. Individuals with no history of orthodontic treatment or other maxillofacial surgical interventions;\n4. Individuals who agree to and are willing to sign the informed consent form.\n\nExclusion Criteria:\n\n1. Individuals diagnosed with genetic or systemic disorders;\n2. Individuals with a recent (within the past 3 months) history of maxillofacial trauma;\n3. Individuals who are incapable of undergoing oral examinations or completing the necessary questionnaires.","ALL","4 Years","20 Years",{"count":43,"type":44},19847,"ESTIMATED","1 Day","OBSERVATIONAL","Malocclusion is a kind of craniomaxillofacial complex deformity caused by heredity, environment, bad habits, trauma, inflammation, tumor and aging. Notably, the last comprehensive national prevalence data on malocclusion in China, which encompassed a significant sample size, dates back over two decades. Given the evolving nature of these epidemiological metrics, such as prevalence rates, it is imperative to update our understanding. Consequently, there is an urgent need for China to undertake a unified, standardized epidemiological survey of malocclusion with a substantial sample size to ensure accurate and timely data collection.",[49,50],"Epidemiological Investigation","Malocclusion","NOT_YET_RECRUITING","2025-05-11",{"date":54,"type":55},"2025-05-14","ACTUAL",{"date":57,"type":44},"2025-05",{"date":59,"type":44},"2026-12",{"name":5,"class":6}]