Diabetes does not influence the early outcome of total knee replacement: A prospective study assessing the Oxford knee score, short form 12, and patient satisfaction

N. D. Clement*, D. MacDonald, R. Burnett, S. J. Breusch

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Background: There is conflicting evidence as to whether diabetes mellitus influences the functional outcome and patient satisfaction after a total knee replacement (TKR). The aim of this study was to assess the effect of diabetes upon the Oxford knee score (OKS), short form (SF)-12, and patient satisfaction after TKR. Methods: Prospective pre- and post-operative (one year) OKS and SF-12 scores for 2389 patients undergoing primary TKR were compiled, of which 275 (12%) patients suffered with diabetes. Patient satisfaction was assessed at one year. Results: Patients with diabetes were more likely to have a greater level of comorbidity (p < 0.001), and a worse pre-operative OKS and SF-12 score (p < 0.02), compared to those patients without diabetes. Diabetes was not a significant (p > 0.41) independent predictor of post-operative OKS or the SF-12 physical score on multivariable analysis. Although, factors more prevalent within the diabetic cohort (heart disease, vascular disease, liver disease, anaemia, depression, back pain, worse pre-operative OKS and SF-12 score) were found to be independent predictors of post-operative OKS and SF-12 physical score. Interestingly, diabetes was associated with a significantly greater improvement in mental wellbeing (SF-12 mental component), which was confirmed on multivariable analysis. Patient satisfaction was not influenced by a concomitant diagnosis of diabetes (p = 0.57). Conclusion: The outcome of TKR as assessed by the OKS, SF-12, and overall patient satisfaction rates are not influenced by diabetes per se, although factors more prevalent within this population result in a worse post-operative outcome. Level of evidence: prospective cohort study, level III.

Original languageEnglish
Pages (from-to)437-441
Number of pages5
JournalKnee
Volume20
Issue number6
DOIs
Publication statusPublished - 1 Dec 2013

Keywords

  • Diabetes mellitus
  • Outcome
  • Satisfaction
  • Total knee replacement

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