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Official Journal of the Italian Society of Orthopaedics and Traumatology

Table 2 Results of the regression analyses to evaluate the associations between the preoperative factors and the postoperative outcomes

From: Key factors in determining surgical timing of total knee arthroplasty in osteoarthritic patients: age, radiographic severity, and symptomatic severity

Preoperative factor PO WOMAC pain score PO WOMAC function scorea Patient satisfaction
β coefficient P value β coefficient P value Odds ratio [95% CI] P value
Age 0.101 0.118 0.232 <0.001 0.931 [0.849–1.021] 0.130
Radiographic OA score −0.024 0.700 −0.078 0.193 1.119 [0.833–1.503] 0.456
Preoperative WOMAC score
 Pain 0.189 0.002 0.041 0.621 0.866 [0.730–1.027] 0.097
 Function −0.031 0.717 0.205 <0.001 1.018 [0.960–1.080] 0.551
  1. The associations between the preoperative factors and the postoperative WOMAC scores were tested using the linear regression analysis, while the associations between the preoperative factors and patient satisfaction were tested using the logistic regression analysis
  2. PO Postoperative, WOMAC Western Ontario and McMaster Universities Osteoarthritis Index, OA osteoarthritis, CI confidence interval
  3. aAs the postoperative range of motion was associated with the postoperative WOMAC function score (β coefficient = −0.179, P = 0.003), the confounding effect was controlled with multivariate regression analysis