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Table 4 Independent predictors of a MCID in the improvement in the OKS from 6 to 12 months after TKA

From: One-year Oxford knee scores should be used in preference to 6-month scores when assessing the outcome of total knee arthroplasty

Demographic Descriptive Odds ratio 95% CI P value
BMI For each BMI point 0.97 0.94 to 0.99 0.028
Comorbidity Not present Reference*   
Diabetes mellitus 0.61 0.39 to 0.96 < 0.001
Functional measure
OKS Preoperative 1.05 1.02 to 1.07 < 0.001
6 Months 0.91 0.89 to 0.92 < 0.001
  1. Logistic regression analysis: entering all variables into the model (Table 1) using forward conditional methodology. The R2 value of the model was 0.10
  2. MCID minimal clinically important difference, OKS Oxford Knee Score, TKA total knee arthroplasty, BMI body mass index, CI confidence interval
  3. *Odds ratio relative to a patient without the stated comorbidity