[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100630768":3},{"organization":4,"armGroups":7,"interventions":16,"overallOfficials":10,"centralContacts":22,"locations":28,"responsibleParty":41,"collaborators":10,"id":45,"slug":46,"hasResults":47,"nctId":48,"briefTitle":49,"officialTitle":50,"acronym":10,"eligibilityCriteria":51,"healthyVolunteers":47,"sex":52,"minAge":10,"maxAge":10,"enrollmentInfo":53,"targetDuration":10,"studyType":56,"phases":10,"briefSummary":57,"conditions":58,"keywords":60,"overallStatus":31,"whyStopped":10,"lastUpdateSubmitDate":63,"lastUpdatePostDateStruct":64,"startDateStruct":67,"completionDateStruct":69,"leadSponsor":71,"locationsCount":72},{"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,"countryCode":34,"cosmosGeoPoint":35,"geoPoint":40,"contacts":10},"Sohag University Hospital","RECRUITING","Sohag","Egypt","EG",{"type":36,"coordinates":37},"Point",[38,39],31.69478,26.55695,{"lat":39,"lon":38},{"type":42,"investigatorFullName":43,"investigatorTitle":44,"investigatorAffiliation":5,"oldNameTitle":10,"oldOrganization":10},"PRINCIPAL_INVESTIGATOR","Ahmed Osama Rashad","Resident doctor","100630768","association-between-benign-paroxysmal-positional-vertigo-and-vitamin-d-deficiency--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":54,"type":55},160,"ESTIMATED","OBSERVATIONAL","Association between Benign Paroxysmal Positional Vertigo and Vitamin D deficiency",[59],"Benign Paroxysmal Positional Vertigo (BPPV)",[61,62],"Vitamin D deficiency","Benign Paroxysmal Positional Vertigo","2026-06-16",{"date":65,"type":66},"2026-06-18","ACTUAL",{"date":68,"type":66},"2026-04-01",{"date":70,"type":55},"2026-10-01",{"name":5,"class":6},1]