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Total knee replacement after high tibial osteotomy: time-to-event analysis and predictors.
- Source :
- Canadian Medical Association Journal (CMAJ); 2/1/2021, Vol. 193 Issue 5, pE158-E166, 9p, 1 Diagram, 2 Charts, 3 Graphs
- Publication Year :
- 2021
-
Abstract
- <bold>Background: </bold>An important aim of high tibial osteotomy (HTO) is to prevent or delay the need for total knee replacement (TKR). We sought to estimate the frequency and timing of conversion from HTO to TKR and the factors associated with it.<bold>Methods: </bold>We prospectively evaluated patients with osteoarthritis (OA) of the knee who underwent medial opening wedge HTO from 2002 to 2014 and analyzed the cumulative incidence of TKR in July 2019. The presence or absence of TKR on the HTO limb was identified from the orthopedic surgery reports and knee radiographs contained in the electronic medical records for each patient at London Health Sciences Centre. We used cumulative incidence curves to evaluate the primary outcome of time to TKR. We used multivariable Cox proportional hazards analysis to assess potential preoperative predictors including radiographic disease severity, malalignment, correction size, pain, sex, age, body mass index (BMI) and year of surgery.<bold>Results: </bold>Among 556 patients who underwent 643 HTO procedures, the cumulative incidence of TKR was 5% (95% confidence interval [CI] 3%-7%) at 5 years and 21% (95% CI 17%-26%) at 10 years. With the Cox proportional hazards multivariable model, the following preoperative factors were significantly associated with an increased rate of conversion: radiographic OA severity (adjusted hazard ratio [HR] 1.96, 95% CI 1.12-3.45), pain (adjusted HR 0.85, 95% CI 0.75-0.96)], female sex (adjusted HR 1.67, 95% CI 1.08-2.58), age (adjusted HR 1.50 per 10 yr, 95% CI 1.17-1.93) and BMI (adjusted HR 1.31 per 5 kng/m2, 95% CI 1.12-1.53).<bold>Interpretation: </bold>We found that 79% of knees did not undergo TKR within 10 years after undergoing medial opening wedge HTO. The strongest predictor of conversion to TKR is greater radiographic disease at the time of HTO. [ABSTRACT FROM AUTHOR]
- Subjects :
- TOTAL knee replacement
ORTHOPEDIC surgery
TOTAL ankle replacement
OSTEOTOMY
PROPORTIONAL hazards models
ELECTRONIC health records
BODY mass index
TIBIA surgery
KNEE diseases
PAIN measurement
AGE distribution
DISEASE incidence
SEVERITY of illness index
SEX distribution
OSTEOARTHRITIS
LONGITUDINAL method
Subjects
Details
- Language :
- English
- ISSN :
- 08203946
- Volume :
- 193
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- Canadian Medical Association Journal (CMAJ)
- Publication Type :
- Academic Journal
- Accession number :
- 148769689
- Full Text :
- https://doi.org/10.1503/cmaj.200934