title: Quality measures for total ankle replacement, 30-day readmission and reoperation rates within 1 year of surgery: a data linkage study using the NJR data set.
abstract: To report on the rate of 30-day readmission and the rate of additional or revision surgery within 12 months following total ankle replacement (TAR).
  
  
  
  A data-linkage study of the UK National Joint Registry (NJR) data and Hospital Episodes Statistics (HES) database. These two databases were linked in a deterministic fashion. HES episodes 12 months following the index procedure were isolated and analysed. Logistic regression was used to model predictors of reoperation and revision for primary ankle replacement.
  
  
  
  All patients who underwent primary and revision ankle replacements according to the NJR between February 2008 and February 2013.
  
  
  
  The rate of 30-day readmission following primary and revision ankle replacement was 2.2% and 1.3%, respectively. In the 12 months following primary and revision ankle replacements, the revision rate (where implants needed to be removed) was 1.2% with increased odds in those orthopaedic units preforming <20 ankle replacements per year and patients with a preoperative fixed equinus deformity. The reoperation other than revision (where implants were not removed) in the 12 months following primary and revision TARs was 6.6% and 9.3%, respectively. Rheumatoid arthritis, cemented prosthesis and high ASA grade significantly increased the odds of reoperation.
  
  
  
  TAR has a 30-day readmission rate of 2.2%, which is similar to that of knee replacement but lower than that of total hip replacement. 6.6% of patients undergoing primary TAR require a reoperation within 12 months of the index procedure. Early revision rates are significantly higher in low-volume centres.
authors.affiliation: UCL Institute of Orthopaedics and Musculoskeletal Science (IOMS), Royal National Orthopaedic Hospital (RNOH), Stanmore, London, UK.
authors.forename: Razi
authors.initials: R
authors.lastname: Zaidi
authors.affiliation: Norwich Medical School, University of East Anglia, Norwich, UK.
authors.forename: Alexander J
authors.initials: AJ
authors.lastname: Macgregor
authors.affiliation: UCL Institute of Orthopaedics and Musculoskeletal Science (IOMS), Royal National Orthopaedic Hospital (RNOH), Stanmore, London, UK.
authors.forename: Andy
authors.initials: A
authors.lastname: Goldberg
mesh_terms: D000328:Adult; D000368:Aged; D058737:Arthroplasty, Replacement, Ankle / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D016247:Information Storage and Retrieval; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D010359:Patient Readmission / Q000706:statistics & numerical data*; D012042:Registries; D012086:Reoperation / Q000706:statistics & numerical data*; D013997:Time Factors; D006113:United Kingdom
keywords: ankle replacement; data linkage; national joint registry