Comparative outcomes of total hip and knee arthroplasty: a prospective cohort study

David Hamilton*, G. Robin Henderson, Paul Gaston, Deborah MacDonald, Colin Howie, A. Hamish R.W. Simpson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

62 Citations (Scopus)


Purpose: The comparative outcome of primary hip and knee arthroplasty is not well understood. This study aimed to investigate the outcome and satisfaction of these procedures and determine predictive models for 1 year patient outcome with a view to informing surgical management and patient expectations. Study design: Prospective cohort study of all primary hip and knee arthroplasty procedures performed at the Royal Infirmary of Edinburgh between January 2006 and November 2008. General health (SF-12) and joint specific function (Oxford Score) was assessed preoperatively and at 6 and 12months post-operatively. Patient satisfaction was assessed at 12 months. Results: 1410 total hip arthroplasty (THA) and 1244 total knee arthroplasty(TKA) procedures were assessed. Oxford Score improved by 4.9 points more in THA patients than in TKA patients. SF-12 physical scores were on average 2.7 points greater in the THA patients at one year. Satisfaction was also greater (91%)following THA compared with TKA (81%). Regression modelling was not able to predict individual patient outcome; however, mean pre-operative Oxford Scores were found to be strong predictors of mean postoperative Oxford Scores for each procedure. Age, gender and pre-operative general health scores did not influence these models. Conclusions: Both THA and TKA confer substantial improvement in patient outcome; however, greater joint specific, general health and satisfaction scores are reported following THA. This difference is physical in nature. Regression models are presented that can be applied to predict mean hip/knee arthroplasty outcome based on preoperative values.

Original languageEnglish
Pages (from-to)627-631
Number of pages5
JournalPostgraduate Medical Journal
Early online date21 Jul 2012
Publication statusPublished - Nov 2012


  • y hip and knee arthroplasty
  • surgical management
  • patients

ASJC Scopus subject areas

  • Medicine(all)


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