Do Total Ankle Replacements have Worse Outcomes when Compared to Total Knee and Hip Replacements at 10 Years Post-Operatively? A Prospective Clinical Study

Abstract

Category: Ankle Arthritis; Ankle Introduction/Purpose: There is paucity of literature comparing patient reported outcomes (PROMs) between total joint arthroplasties. There is a need to study the PROMS data to understand outcomes of treatment and factors affecting outcomes. We aimed to to study the PROMs data for total ankle replacement (TAR) to 10 years. To study how PROMS outcomes of TAR compare to total hip replacement (THR) and total knee replacement (TKR) at 10 years Methods: This is a prospective data collection from local hospital joint registry. 10 year follow up data was collected from patients who underwent a total joint replacement (Hip, Knee or ankle), provided informed consent for their data. Patients who refused consent, or had cognitive language problems were not approached for participation in the registry. Self-administered questionnaire data included WOMAC scores, Foot and ankle outcomes scores (FAOS), SF-36 scores and patient satisfaction data. Data was collected at pre-op, 3 years, 5 years and 10 years post operatively. Statistical tests including ANOVA, GLM univariate tests and chi-square tests were used for analysis. Results: There were 119 patients who underwent TAR for the duration of 2006-2009. 74 patients were male (62.18%). Average age of patients was 59.1 yrs. Data was available on 2672 THR and 3520 TKR patients. At 5 years, TAR patients reported lower scores for stiffness, similar outcomes to THR and TKR for mental health score, similar to TKR for ¾ physical domains (p<0.05), but lower satisfaction rates for ADL and recreation when compared to THR (p<0.05). We are currently processing the questionnaires for 10 year mailing returns (completion expected March 2020). Conclusion: The outcomes for TAR were similar to outcomes reported by TKR patients at 10 years but lower than THR. The lower score of TAR was due to stiffness and recreational activity comparing to THR. We aim to present the complete set of results if the abstract is accepted (data completion March 2020).