title: Correlation between the level of physical activity as measured by accelerometer and the Harris Hip Score.
abstract: BACKGROUND
  The most widely used method to assess the outcome of total hip arthroplasty (THA) is the Harris Hip Score (HHS). Patients' expectations about the benefits of hip arthroplasty are increasing and are no longer limited to pain reduction. Patients believe they will be able to do recreational activity and sport after surgery. It is also essential to assess the level of physical activity after arthroplasty insofar as it is associated with early failure of the components. The purpose of this study is to explore correlation of the HHS with physical activity in patients with THA.
  
  
  METHODS
  This is a cross-sectional study on 47 patients with THA. Correlation of HHS with the results of physical activity obtained objectively using accelerometer worn for a week and subjectively using the IPAQ questionnaire and the UCLA scale.
  
  
  RESULTS
  There was no correlation between the HHS and the activity measured using accelerometers, or with the IPAQ activity questionnaire. The HHS reported moderately significant correlations with the UCLA scale.
  
  
  CONCLUSIONS
  The HHS may not be as discriminatory as other instruments at assessing patient activity levels after THA.
authors.affiliation: Hospital Arnau de Vilanova, Valencia - Spain.|Faculty of Health Sciences, University Cardenal Herrera CEU, Valencia - Spain.
authors.forename: Alejandro
authors.initials: A
authors.lastname: Alvarez
authors.affiliation: Hospital Arnau de Vilanova, Valencia - Spain.|Faculty of Health Sciences, University Cardenal Herrera CEU, Valencia - Spain.
authors.forename: Julio
authors.initials: J
authors.lastname: Domenech
authors.affiliation: Hospital Arnau de Vilanova, Valencia - Spain.
authors.forename: Carlos
authors.initials: C
authors.lastname: Valverde-Mordt
authors.affiliation: Faculty of Health Sciences, University Cardenal Herrera CEU, Valencia - Spain.
authors.forename: Juan F
authors.initials: JF
authors.lastname: Lison
mesh_terms: D061725:Accelerometry / Q000379:methods*; D000367:Age Factors; D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects / Q000379:methods*; D003430:Cross-Sectional Studies; D005260:Female; D005500:Follow-Up Studies; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D009043:Motor Activity / Q000502:physiology*; D010147:Pain Measurement; D011475:Prosthesis Failure; D016059:Range of Motion, Articular / Q000502:physiology*; D012016:Reference Values; D012189:Retrospective Studies; D018570:Risk Assessment; D012737:Sex Factors; D018709:Statistics, Nonparametric; D011795:Surveys and Questionnaires; D016896:Treatment Outcome