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Roubos, MSc.","CONTACT","+31 20 599 3653","L.A.C.Roubos@olvg.nl",[33,50,63,76,89,102,115,128,141],{"facility":34,"status":35,"city":36,"state":22,"zip":22,"country":37,"countryCode":38,"cosmosGeoPoint":39,"geoPoint":44,"contacts":45},"OLVG","RECRUITING","Amsterdam","Netherlands","NL",{"type":40,"coordinates":41},"Point",[42,43],4.88969,52.37403,{"lat":43,"lon":42},[46],{"name":47,"role":29,"phone":48,"phoneExt":22,"email":49},"Prof. Poolman","+31 20 510 8911","R.W.Poolman@olvg.nl",{"facility":51,"status":35,"city":52,"state":22,"zip":22,"country":37,"countryCode":38,"cosmosGeoPoint":53,"geoPoint":57,"contacts":58},"Amphia","Breda",{"type":40,"coordinates":54},[55,56],4.77596,51.58656,{"lat":56,"lon":55},[59],{"name":60,"role":29,"phone":61,"phoneExt":22,"email":62},"Van Oost, MSc.","+31 76 595 5000","Ivanoost@amphia.nl",{"facility":64,"status":35,"city":65,"state":22,"zip":22,"country":37,"countryCode":38,"cosmosGeoPoint":66,"geoPoint":70,"contacts":71},"Deventer 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Follow-Up at 1 Year After Hip- or Knee Arthroplasty: Wasting Resources or Appropriate Healthcare?","Cost-effectiveness of Routine Follow-up at One Year After Total Hip and Knee Arthroplasty Compared to Check-up on Demand: a Multicenter Hybrid Stepped-wedge Cluster De-implementation Study","HAKA 1year FU","Inclusion Criteria:\n\n* Painful and disabled hip or knee joint resulting from osteoarthritis\n* Scheduled for primary THA or TKA surgery\n* Age 50 years or older at the time of THA or TKA\n* Capable and willing to complete questionnaires\n* Proficient in Dutch or English\n* Willing to provide informed consent\n\nExclusion Criteria:\n\n* Other indication for surgery than osteoarthritis\n* Scheduled for hip or knee revision arthroplasty, except a conversion from unicompartmental knee arthroplasty to TKA or from hip hemiarthroplasty\u002Fresurfacing to THA\n* Already participating in this study due to a previous hip or knee surgery","ALL","50 Years",{"count":172,"type":173},1000,"ESTIMATED","INTERVENTIONAL",[176],"NA","After undergoing total hip or total knee arthroplasty, current guidelines recommend routine follow-up with an X-ray within 3 months and again at 1 year. Follow-up at 5 years (for hip arthroplasties) or every 5 years (for knee arthroplasties) is also considered worthwhile according to the guideline. However, these follow-up appointments require considerable time from patients, caregivers, and healthcare professionals, and it is unclear whether they are truly beneficial. It is possible that a single follow-up within 3 months is sufficient. This could potentially prevent over 100,000 unnecessary hospital visits per year, resulting in significant cost savings. If patients or healthcare providers have concerns, they can always request an additional follow-up.\n\nThe HAKA trial consists of three different work packages (WPs). This trial (WP1) investigates the 1-year follow-up, WP2 examines the 10-year follow-up, and WP3 is a qualitative study exploring the experiences and perceptions of patients and healthcare professionals. The aim of the HAKA trial is to safely reduce routine follow-up appointments after total hip or knee arthroplasty and to revise current clinical guidelines accordingly.",[179,180],"Hip Arthroplasty, Total","Knee Arthroplasty, Total",[182,183,184,185,186],"total hip arthroplasty","total knee arthroplasty","follow-up","PROMIS physical function","healthcare consumption","2025-11-14",{"date":189,"type":190},"2025-11-18","ACTUAL",{"date":192,"type":190},"2025-07-01",{"date":194,"type":173},"2029-12-31",{"name":5,"class":6},9]