[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100630768":3},{"organization":4,"armGroups":7,"interventions":16,"overallOfficials":10,"centralContacts":22,"locations":28,"responsibleParty":40,"collaborators":10,"id":44,"slug":10,"hasResults":45,"nctId":46,"briefTitle":47,"officialTitle":48,"acronym":10,"eligibilityCriteria":49,"healthyVolunteers":45,"sex":50,"minAge":10,"maxAge":10,"enrollmentInfo":51,"targetDuration":10,"studyType":54,"phases":10,"briefSummary":55,"conditions":56,"keywords":58,"overallStatus":31,"whyStopped":10,"lastUpdateSubmitDate":61,"lastUpdatePostDateStruct":62,"startDateStruct":65,"completionDateStruct":67,"leadSponsor":69,"locationsCount":70},{"fullName":5,"class":6},"Sohag University","OTHER",[8,13],{"label":9,"type":10,"description":10,"interventionNames":11},"case",null,[12],"Diagnostic Test: Vitamin D",{"label":14,"type":10,"description":10,"interventionNames":15},"control",[12],[17],{"type":18,"name":19,"description":20,"armGroupLabels":21,"otherNames":10},"DIAGNOSTIC_TEST","Vitamin D","Level of Vitamin D",[9,14],[23],{"name":24,"role":25,"phone":26,"phoneExt":10,"email":27},"Ahmed Usama","CONTACT","2001012888469","ahmedurashad2101@gmail.com",[29],{"facility":30,"status":31,"city":32,"state":10,"zip":10,"country":33,"cosmosGeoPoint":34,"geoPoint":39,"contacts":10},"Sohag University Hospital","RECRUITING","Sohag","Egypt",{"type":35,"coordinates":36},"Point",[37,38],31.69478,26.55695,{"lat":38,"lon":37},{"type":41,"investigatorFullName":42,"investigatorTitle":43,"investigatorAffiliation":5,"oldNameTitle":10,"oldOrganization":10},"PRINCIPAL_INVESTIGATOR","Ahmed Osama Rashad","Resident doctor","100630768",false,"NCT07491965","Association Between Benign Paroxysmal Positional Vertigo and Vitamin D Deficiency .","Association Between Benign Paroxysmal Positional Vertigo and Vitamin D Deficiency ; Sohag University Hospital Experience.","Inclusion Criteria:\n\n* • Cases: Adults with a confirmed diagnosis of idiopathic BPPV based on positive Dix-Hallpike maneuver (nystagmus and vertigo lasting \\\u003C1 minute).\n\n  * Controls: Adults attending ENT clinic without history of vertigo or BPPV, confirmed by negative Dix-Hallpike test.\n\nExclusion Criteria:\n\n* Known causes of secondary vertigo (e.g., Meniere's disease, vestibular neuritis, central vertigo).\n\n  * Conditions affecting vitamin D metabolism (e.g., chronic kidney disease, malabsorption syndromes, hyperparathyroidism).\n  * Use of medications interfering with vitamin D levels (e.g., anticonvulsants, glucocorticoids) in the past 3 months.\n  * Pregnancy or lactation.\n  * Inability to provide consent.","ALL",{"count":52,"type":53},160,"ESTIMATED","OBSERVATIONAL","Association between Benign Paroxysmal Positional Vertigo and Vitamin D deficiency",[57],"Benign Paroxysmal Positional Vertigo (BPPV)",[59,60],"Vitamin D deficiency","Benign Paroxysmal Positional Vertigo","2026-06-16",{"date":63,"type":64},"2026-06-18","ACTUAL",{"date":66,"type":64},"2026-04-01",{"date":68,"type":53},"2026-10-01",{"name":5,"class":6},1]