DOS 2020

204 · DOS Abstracts Patient involvement in evaluation of the Hip Disability and Osteoarthritis Outcome Score (HOOS) in patients undergoing total hip arthroplasty. Camilla Holmenlund, Randi Bilberg, Maja Tang Jensen, Søren Overgaard, Claus Varnum Department of Orthopaedic Surgery and Traumatology, Odense University Hospital; Department of Clinical Research, Unit of Clinical Alcohol Research, University of Southern Denmark; Department of Orthopaedic Surgery and Traumatology and Department of Clinical Research, Faculty of Health Sciences, Odense University Hospital and University of Southern Denmark; Department of Orthopaedic Surgery, Section for Hip and Knee Replacement and Department of Regional Health Research, Vejle Hospital and University of Southern Denmark Background: The Hip disability and Osteoarthritis Outcome Score (HOOS) has previ- ously been recommended as a patient reported outcome measure for patients with hip osteoarthritis (OA) undergoing total hip arthroplasty (THA). The HOOS is an adaptation of the Knee injury and Osteoarthritis Outcome Score which again is an adaptation of the Western Ontario and Macmaster Universities Osteoarthritis index. The HOOS was devel- oped 18 years ago with only partial patient involvement. Purpose / Aim of Study: We aimed to evaluate if the HOOS contains items that pres- ent-day patients undergoing THA find relevant preoperatively and postoperatively in a patient involvement study. Materials and Methods: Patients aged 60-75 years, diagnosed with primary OA, and receiving a THA was included. We recruited patients for focus group interviews preoper- atively and at 3, and 12 months after primary THA from a university and a regional hos- pital. We conducted 6 focus group interviews with 28 patients in total. The interviews were transcribed and analyzed using qualitative inductive thematic content analysis. Findings / Results: When comparing items identified from the transcripts to the items of the HOOS, we showed that 7 of 40 items were very important or important at all 3 time periods. They included walking, pain, awareness of the hip and light domestic duties. 8 of 40 items, including bending the hip and rising from the bed, were not mentioned at neither of the time periods. 25 items mentioned by the patients and identified from the transcripts were not represented in the HOOS. 5 of these, including cycling and the abili- ty to get on the floor, were found to be very important at all 3 time periods. Furthermore, 3 items related to psychological health, including fear of dislocation, were found to be important at all 3 time periods. Conclusions: According to present-day patients in a Danish population, we showed that the HOOS lacks several dimensions. Furthermore, we showed that the HOOS still have some items that are relevant to present-day patients but also contains several items not mentioned by the patients. In perspective, this study shows that patient preferences may change over time and may indicate a need for revision of the HOOS score to get better content validity. 183.