Abstracts Posters SICOT-SOF meeting Gothenburg 2010 _2_

Poster
Topic: General Orthopaedics
Abstract number: 26420
FACTORS DETERMINING THE LENGTH OF STAY FOLLOWING A PRIMARY
TOTAL KNEE REPLACEMENT
Shruti RAUT, Stephan MERTES, Vikas KHANDUJA
Addenbrooke’s - Cambridge University Hospitals NHS Foundation Trust, Cambridge
(UNITED KINGDOM)
Aim: The aim of this study was to determine the factors that affect the length of stay
in hospital following a primary total knee replacement. Materials and Methods: It is a
retrospective analysis of all the patients who underwent a primary total knee
replacement (TKR) between January and December 2008 at our institution (n=346).
A comprehensive database was developed and all the patient records were
examined for pre, intra and post-operative factors that had previously been shown to
affect length of stay and recorded into the database. At the time of submission of the
abstract complete data from 175 operations was available. Spearman’s correlation
coefficient, Mann-Whitney U test or Kruskal-Wallis ANOVA were used to analyse the
data depending on the nature of the variable. Results: The following factors were
found to significantly affect the length of stay at the 95% confidence level: Age,
marital status, pre-operative use of a walking aid, comorbidity, pre and post-operative
haemolobin, post-operative blood transfusion requirement, weekday of surgery, early
post-operative mobilisation, post-operative day on which 10m mobilisation or 90o
knee flexion were achieved, post-operative complications and ITU stay and the postoperative
day deemed fit for discharge by occupational therapy. Conclusion: The
above patient and treatment-related factors are associated with length of stay
following a primary TKR. Although preliminary these results certainly show a trend
and further investigation is warranted to assess whether modifying these factors has
an impact on length of stay and the potential use of the above in a predictive model.
281