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- Title
Patient-specific and intra-operatively modifiable factors assessed by computer navigation predict maximal knee flexion one year after TKA.
- Authors
Lampe, Frank; Marques, Carlos; Fiedler, Franziska; Sufi-Siavach, Anusch; Carita, Ana; Matziolis, Georg; Marques, Carlos J; Carita, Ana I
- Abstract
<bold>Purpose: </bold>There are multiple factors affecting maximal knee flexion (MKF) after total knee arthroplasty (TKA). The aim of the study was to investigate whether patient-specific factors (PSF) and surgically modifiable factors (SMF), measured by means of a computer-assisted navigation system, can predict the MKF after TKA.<bold>Methods: </bold>Data from 99 patients collected during a randomized clinical trial were used for this secondary data analysis. The MKF of the patients was measured preoperatively and 1-year post-surgery. Multiple regression analyses were performed to investigate which combination of variables would be the best to predict the 1-year MKF.<bold>Results: </bold>When considering SMF alone, the combination of three factors significantly predicted the 1-year MKF (p = 0.001), explaining 22 % of its variation. When considering only PSF, the combination of pre-op MKF and BMI significantly predicted the 1-year MKF (p < 0.001), explaining 23 % of its variation. When considering both groups of potential predictors simultaneously, the combination of five SMF with two PSF significantly predicted the 1-year MKF (p = 0.001), explaining 32 % of its variation.<bold>Conclusions: </bold>Computer navigation variables alone could explain 22 % of the variance in the 1-year MKF. The larger proportion (32 %) of the 1-year MKF variation could be explained with a combination of SMF and PSF. The results of studies in this area could be used to identify patients at risk of poor outcomes.<bold>Level Of Evidence: </bold>Level II, Prognostic study.
- Subjects
TOTAL knee replacement; COMPUTER-assisted surgery; RANGE of motion of joints; BODY mass index; PROGNOSIS; CLINICAL trials; KNEE surgery; KNEE diseases; LONGITUDINAL method; OSTEOARTHRITIS
- Publication
Knee Surgery, Sports Traumatology, Arthroscopy, 2016, Vol 24, Issue 11, p3457
- ISSN
0942-2056
- Publication type
journal article
- DOI
10.1007/s00167-016-4134-x