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Table 4 Results of logistic regression models – factors associated with patients’ willingness to undergo TJR

From: Which disease-related factors influence patients’ and physicians’ willingness to consider joint replacement in hip and knee OA? Results of a questionnaire survey linked to claims data

Variable Reference OR hip 95% CI hip p-Value hip OR knee 95% CI knee p-Value knee
Age, years per 10-year increment 0.9 (0.67; 1.19) 0.45 1.09 (0.9; 1.31) 0.38
Sex, female Male 0.99 (0.53; 1.86) 0.98 0.77 (0.5; 1.18) 0.22
BMI > =35 kg/m2a < 35 kg/m2 0.44 (0.15; 1.36) 0.15 1 (0.53; 1.91) 1
Symptom duration, yearsb per 5-year increment 1.01 (0.86; 1.19) 0.9 1.07 (0.99; 1.16) 0.09
Deterioration of symptoms over the 2 preceding yearsa no change/ improvement 2.73 (1.14; 6.55) 0.02 3.66 (2.05; 6.53) < 0.01
WOMACa per 10-unit increase 1.47 (1.24; 1.75) < 0.01 1.42 (1.26; 1.61) < 0.01
Any impact on personal lifea No impact 10.3c (1.04; 103) 0.05 6.81 (2.23; 20.79) < 0.01
WHO-5a per 10 units increase 0.98 (0.86; 1.11) 0.72 0.86 (0.79; 0.95) < 0.01
Treatment by orthopaedist a Treatment by other physician 2.39 (1.04; 5.48) 0.04 1.44 (0.84; 2.46) 0.18
NSAID prescriptiona No 0.97 (0.53; 1.77) 0.91 1.27 (0.78; 2.07) 0.34
Opioid prescriptiona No 0.9 (0.32; 2.54) 0.85 1.83 (1.01; 3.34) 0.05
Physical therapy prescriptiona No 1.24 (0.65; 2.39) 0.51 1.19 (0.72; 1.95) 0.49
Having at least one artificial joint No 6.01 (3; 12.06) < 0.01 3.69 (2.2; 6.18) < 0.01
  1. aadjusted for age, sex, symptom duration
  2. badjusted for age, sex
  3. cThis result is not robust (see confidence interval) since there are only few patients willing for TJR without impact on their personal life
  4. Results of 11 multiple logistic regression models with “patients’ willingness to undergo TJR” as independent variable. Bold numbers indicate statistically significant associations
  5. Multiple imputation (n = 20 imputations) was used to deal with missing values