[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100651744":3},{"organization":4,"armGroups":7,"interventions":14,"overallOfficials":23,"centralContacts":27,"locations":33,"responsibleParty":50,"collaborators":19,"id":53,"slug":54,"hasResults":55,"nctId":56,"briefTitle":57,"officialTitle":57,"acronym":19,"eligibilityCriteria":58,"healthyVolunteers":55,"sex":59,"minAge":60,"maxAge":19,"enrollmentInfo":61,"targetDuration":19,"studyType":64,"phases":65,"briefSummary":67,"conditions":68,"keywords":70,"overallStatus":73,"whyStopped":19,"lastUpdateSubmitDate":74,"lastUpdatePostDateStruct":75,"startDateStruct":78,"completionDateStruct":80,"leadSponsor":82,"locationsCount":83},{"fullName":5,"class":6},"University of Calgary","OTHER",[8],{"label":9,"type":6,"description":10,"interventionNames":11},"Enrolled Study Participants","All enrolled participants will be simultaneously patch tested with both expired and non-expired patches. Therefore, there is no difference in intervention amongst study participants.",[12,13],"Biological: Patch 1 (Expired)","Biological: Patch 2 (non-expired)",[15,20],{"type":16,"name":17,"description":10,"armGroupLabels":18,"otherNames":19},"BIOLOGICAL","Patch 1 (Expired)",[9],null,{"type":16,"name":21,"description":10,"armGroupLabels":22,"otherNames":19},"Patch 2 (non-expired)",[9],[24],{"name":25,"affiliation":5,"role":26},"Laurie Parsons, Medical Doctor","PRINCIPAL_INVESTIGATOR",[28],{"name":29,"role":30,"phone":31,"phoneExt":19,"email":32},"Dylan Hollman, Medical Doctor","CONTACT","1-403-955-8444","dylan.hollman@ucalgary.ca",[34],{"facility":35,"status":19,"city":36,"state":37,"zip":38,"country":39,"countryCode":40,"cosmosGeoPoint":41,"geoPoint":46,"contacts":47},"Richmond Road Diagnostic Treatment Centre","Calgary","Alberta","T2T 5C7","Canada","CA",{"type":42,"coordinates":43},"Point",[44,45],-114.08529,51.05011,{"lat":45,"lon":44},[48,49],{"name":29,"role":30,"phone":31,"phoneExt":19,"email":32},{"name":25,"role":26,"phone":19,"phoneExt":19,"email":19},{"type":26,"investigatorFullName":51,"investigatorTitle":52,"investigatorAffiliation":5,"oldNameTitle":19,"oldOrganization":19},"Laurie Parsons","Principle Investigator","100651744","phase-4-reliability-of-expired-allergens-in-patch-testing-a-comparative-study-with-non-expired-series-100651744",false,"NCT07765563","Reliability of Expired Allergens in Patch Testing: A Comparative Study With Non-Expired Series","Inclusion Criteria:\n\n* Adults (age 18 years or older) referred for patch testing.\n\nExclusion Criteria:\n\n* Relative or absolute contraindication to patch testing\n* Wide spread dermatitis prior to patch placement\n* Inability to return to clinic for reading of results\n* Patient non-consenting","ALL","18 Years",{"count":62,"type":63},100,"ESTIMATED","INTERVENTIONAL",[66],"PHASE4","Patch testing remains the gold standard in the diagnosis of allergic contact dermatitis. Patches used in testing consist of a wide spectrum of allergens, with variability in the stability of products over time. Due to limited allergen stability, careful storage and preparation is needed to prevent product degradation over time. Expiration dates are provided by manufacturers to ensure stability and reactivity, while minimizing the risk of product degradation contributing to inaccurate testing results. Preparation of patch series can be time intensive and procurement of allergens comes with an associated economic burden. Expired allergens are not routinely used in patch testing, however many clinics have expired allergens accessible. There is paucity of evidence comparing the reactivity of expired vs non-expired patch series. If expired allergens remain effective, this could result in significant cost-savings and accessibility implications for dermatology practice.",[69],"Allergic Contact Dermatitis",[71,72],"contact dermatitis","patch testing","NOT_YET_RECRUITING","2026-08-10",{"date":76,"type":77},"2026-08-14","ACTUAL",{"date":79,"type":63},"2026-09",{"date":81,"type":63},"2027-12",{"name":5,"class":6},1]