Page 99 - The value of total hip and knee arthroplasties for patients

Patients’ pre-operative general and specific outcome expectations predict postoperative pain and function after total knee and total hip arthroplasties
Results:
The 146 TKA patients included in this study had a mean age of 66.9 years (SD 9.2) and 69% was female, The 148 THA patients had a mean age 67.2 (SD 9.5) and 57% was female. Mean outcomes: postoperative HOOS-ADL 84.3 (SD 16.6), Pain 88.2 (SD 15.4), KOOS-ADL 83.9 (SD 15.8) and Pain 83.6 (SD 17.1). CEQ- expectancy median was in THA 23 (IQR 21;24) and TKA 23 (IQR 20;24). HSS- expectation sur veys function was for THA 21.0 (18.0;24.0) and 19.0 (14.0;22.0) in TKA. Patients’ outcome expectations were consistently part of the combination of variables that best predicted outcomes for both TKA/THA 1-year post-operatively. Expectations alone explained between 17.0-30.3% of the variance in outcomes.The CEQ expectancy subscale explained more variance of postoperative function in TKA and of function and pain inTHA as compared to the HSS expectation surveys.
Conclusion:
In planning of surgical treatment, orthopedic surgeons should take a range of variables into account of which the patient’s expectations about outcome of surgery is one.The CEQ expectancy subscale predicted outcomes slightly better as the HSS expectation surveys, but differences in predictive value of the two measurements were too small to prefer between the two. Future studies are advised to replicate these findings and externally validate the models presented.
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